JP5771424B2 - Optical line terminator - Google Patents

Description

  The present invention relates to an optical line termination device.

  In recent years, with the progress of optical communication technology, optical transmission systems using optical cables have become widespread. According to this optical transmission system, since repeatless transmission of about several tens of kilometers is possible, the transmission system can be easily widened. In general, this optical transmission system is an optical transmission in which an optical transmitter arranged on the sender side and an optical network unit (ONU) arranged on the receiver side are configured by an optical cable. They are connected via a road. Then, the transmitter side mixes the TV signal and the announcement broadcast signal, converts the mixed electric signal into an optical signal by the optical transmitter, and transmits the optical signal to the optical line terminating device via the optical transmission line. . In this optical line terminator, an optical signal is converted into an electric signal (RF signal) and output to a TV receiver or a notification broadcast receiver (see, for example, Patent Document 1).

JP 2006-174221 A

  Here, when the optical line terminator is installed on the receiver side, it is necessary to check the level of the optical signal input from the optical transmitter to the optical line terminator via the optical transmission line. However, in the conventional apparatus as described above, the operator could not confirm the level of the input optical signal. Therefore, an optical power meter prepared separately was connected to the optical transmission line to measure the level of the optical signal. The work was complicated. When checking the optical signal level for maintenance after installing the optical line terminator, remove the optical line terminator from the optical transmission line and connect the optical power meter to the optical transmission line. After measuring the signal level, it is necessary to connect the optical line termination device to the optical transmission line again, and there is room for reducing the work cost.

  The present invention has been made in view of the above, and an object of the present invention is to provide an optical line termination device that can easily confirm the reception level of an optical signal in the optical line termination device.

In order to solve the above-described problems and achieve the object, an optical line termination device according to claim 1 receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts it into an electrical signal. An optical line terminator comprising: a display means; a photoelectric conversion means for converting the optical signal transmitted from the optical transmitter through the optical transmission line into an electrical signal; and the photoelectric conversion means converted by the photoelectric conversion means. Based on the electrical signal, detection means for detecting the reception level of the optical signal in the optical line termination device, and information corresponding to the reception level of the optical signal detected by the detection means is displayed on the display means. Control means for causing the display means to emit light, and the control means blinks the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means, Detected by detection means Been blink the display unit in a color corresponding to the reception level of the optical signal, to blink the display means in weighted color based on the reception level of said detected light signal by the detecting means.

An optical line terminator according to claim 2 is an optical line terminator that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electric signal. A photoelectric conversion means for converting the optical signal transmitted from the transmitter through the optical transmission path into an electrical signal, and the electrical signal converted by the photoelectric conversion means, based on the electrical signal, the optical line termination device A detection unit that detects a reception level of the optical signal; and a control unit that causes the display unit to display information corresponding to the reception level of the optical signal detected by the detection unit. The display unit emits light. A plurality of display elements, wherein the control means blinks the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means, and is detected by the detection means; Said optical signal The display device of the number corresponding to the reception level blink.

An optical line terminator according to claim 3 is an optical line terminator that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electrical signal. A photoelectric conversion means for converting the optical signal transmitted from the transmitter through the optical transmission path into an electrical signal, and the electrical signal converted by the photoelectric conversion means, based on the electrical signal, the optical line termination device A detecting means for detecting a reception level of the optical signal; and a control means for causing the display means to display information corresponding to the reception level of the optical signal detected by the detecting means, wherein the display means emits light. And the control means blinks the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means, and the control means blinks the display means a plurality of times. Last time Blink in a different manner the flashing and blinking of other times.

According to the optical line termination device of the first aspect, the information corresponding to the reception level of the optical signal detected by the detection means is displayed on the display means, so that the operator prepares an optical power meter or the like separately. In addition, the reception level of the optical signal in the optical line terminator can be easily confirmed via the display means of the optical line terminator itself, and the installation work of the optical line terminator can be further simplified. Also, when the optical signal level is checked for maintenance after installation of the optical line termination device, the optical line termination device itself is not removed from the optical transmission line via the display means of the optical line termination device itself. The reception level of the optical signal in the optical line terminating device can be easily confirmed, and the operation cost can be further reduced.
Further, since the display means blinks at the number of times corresponding to the reception level of the optical signal detected by the detection means, various reception levels of the optical signal can be displayed on the display means by a simple method. Also, the operator can easily confirm the reception level of the optical signal only by confirming the number of blinks of the display means.
In addition, since the display means corresponding to the optical signal reception level blinks in a color corresponding to the optical signal reception level detected by the detection means, the optical signal reception level can be displayed easily and accurately. The operator can more easily check the reception level of the optical signal in the optical line terminating device.
In addition, since the display means blinks with a color weighted based on the reception level of the optical signal detected by the detection means, the reception level of the optical signal can be displayed more easily and accurately. The reception level of the optical signal in the optical line terminator can be more easily confirmed.

According to the optical line termination device of the second aspect, the information corresponding to the reception level of the optical signal detected by the detection means is displayed on the display means, so that the operator prepares an optical power meter or the like separately. In addition, the reception level of the optical signal in the optical line terminator can be easily confirmed via the display means of the optical line terminator itself, and the installation work of the optical line terminator can be further simplified. Also, when the optical signal level is checked for maintenance after installation of the optical line termination device, the optical line termination device itself is not removed from the optical transmission line via the display means of the optical line termination device itself. The reception level of the optical signal in the optical line terminating device can be easily confirmed, and the operation cost can be further reduced.
Further, since the display means blinks at the number of times corresponding to the reception level of the optical signal detected by the detection means, various reception levels of the optical signal can be displayed on the display means by a simple method. Also, the operator can easily confirm the reception level of the optical signal only by confirming the number of blinks of the display means.
Further, since the number of display elements corresponding to the reception level of the optical signal detected by the detection means is blinked, the reception level of the optical signal can be displayed easily and accurately, and the operator can use the optical line termination device. The reception level of the optical signal at can be more easily confirmed.

According to the optical line termination device of the third aspect, the information corresponding to the reception level of the optical signal detected by the detection means is displayed on the display means, so that the operator prepares an optical power meter or the like separately. In addition, the reception level of the optical signal in the optical line terminator can be easily confirmed via the display means of the optical line terminator itself, and the installation work of the optical line terminator can be further simplified. Also, when the optical signal level is checked for maintenance after installation of the optical line termination device, the optical line termination device itself is not removed from the optical transmission line via the display means of the optical line termination device itself. The reception level of the optical signal in the optical line terminating device can be easily confirmed, and the operation cost can be further reduced.
Further, since the display means blinks at the number of times corresponding to the reception level of the optical signal detected by the detection means, various reception levels of the optical signal can be displayed on the display means by a simple method. Also, the operator can easily confirm the reception level of the optical signal only by confirming the number of blinks of the display means.
In addition, when the display means blinks a plurality of times, the display means blinks in a manner different from the last blinking, so that the display means can identify the last blinking. The operator can easily confirm that the blinking of the display means is the last time.

It is a figure which shows the optical line termination | terminus apparatus which concerns on Embodiment 1, (a) is a front view, (b) is a bottom view, (c) is a side view. It is the block diagram which showed the electrical structure of the optical line termination device functionally conceptually. It is the flowchart which showed the schematic example of the display process which an optical line termination | terminus apparatus performs. 6 is a diagram illustrating a display pattern by the display unit according to Embodiment 1. FIG. It is the figure which illustrated the relationship between the color displayed on a display part, and the weighting per blink. 6 is a diagram illustrating a display pattern by a display unit according to Embodiment 2. FIG. 10 is a diagram illustrating a display pattern by a display unit according to Embodiment 3. FIG. FIG. 10 is a diagram illustrating a display pattern by a display unit according to a fourth embodiment. FIG. 10 is a diagram illustrating a display pattern by a display unit according to a fifth embodiment. FIG. 10 is a diagram illustrating a display pattern by a display unit according to a sixth embodiment. 18 is a flowchart illustrating a schematic example of display processing executed by the optical line termination device according to the seventh embodiment. FIG. 10 is a diagram illustrating a display pattern by a display unit according to a seventh embodiment.

  Embodiments of an optical line termination device according to the present invention will be described below in detail with reference to the accompanying drawings. However, the present invention is not limited by these embodiments.

[Embodiment 1]
First, the first embodiment will be described. This form is a form in which the display means blinks at the number of times corresponding to the optical signal reception level of the optical transmitter detected by the detection means.

(Constitution)
First, the configuration of the optical line termination device will be described. 1A and 1B are diagrams showing an optical line termination device according to Embodiment 1, wherein FIG. 1A is a front view, FIG. 1B is a bottom view, and FIG. 1C is a side view. In the following description, the X direction in FIG. 1 is the left-right direction, the Y direction in FIG. 1 is the up-down direction, and the Z direction in FIG. FIG. 2 is a block diagram functionally conceptually showing the electrical configuration of the optical line termination device 1.

  The optical line termination device 1 includes a PD (Photo Diode) 20, an amplification unit 30, an output terminal 40, a display unit 50, a speaker 60, and a control unit 70 shown in FIG. 2 inside the housing 10 shown in FIG. ing.

(Configuration-housing)
The housing 10 is a structure of the optical line termination device 1 and is a protection unit that protects the PD 20, the amplification unit 30, the output terminal 40, the display unit 50, the speaker 60, and the control unit 70 from the outside. As shown in FIG. 1, the housing 10 is configured to include a substantially box-shaped base portion 11 having one side opened, and a cover portion 12 that substantially covers the base portion 11 from the open surface side. The cover 12 is pivotally supported with respect to the base 11 at a position near the upper end thereof. In a state where the cover portion 12 is closed and the base portion 11 is substantially covered, a pair of lead-in ports 13 are formed at positions facing the base portion 11 and the cover portion 12, and an optical fiber ( (Not shown) can be drawn into the housing 10, or an optical fiber can be drawn out from the inside of the housing 10. In addition, a pair of terminal holes 14 are formed on the side of the inlet 13, and the output terminals 40 (for example, a TV signal output terminal, a coaxial connector, etc.) are connected to the housing 10 through the terminal holes 14. A signal cable (hereinafter referred to as a coaxial cable) (not shown) can be connected to the output terminal 40 by being exposed to the outside.

(Configuration-PD)
In FIG. 2, a PD 20 is a photoelectric conversion unit that converts an optical signal transmitted from an optical transmitter (not shown) through an optical transmission path (not shown) into an electrical signal (hereinafter “RF signal”). The PD 20 outputs the RF signal to the amplification unit 30 and the control unit 70.

(Configuration-amplification section)
The amplifying unit 30 is an amplifying unit that amplifies the RF signal output from the PD 20. The amplifying unit 30 is configured using, for example, a known AGC (Automatic Gain Control) circuit, and is controlled by the control unit 70.

(Configuration-output terminal)
The output terminal 40 outputs the RF signal amplified by the amplification unit 30 to an external device (for example, a set top box) of the optical line termination device 1.

(Configuration-display section)
The display unit 50 is a display unit that displays information based on control by the control unit 70. As the display unit 50, for example, an LED (Light Emitting Diode) can be used. As shown in FIG. 1B, the display unit 50 is disposed on the lower surface of the housing 10 so as to be visible from the outside, for example. In the first embodiment, the display unit 50 includes an LED 51 (“PWR” in FIG. 1B) indicating power ON / OFF of the optical line termination device 1 and an LED 52 indicating the output state of the RF signal (FIG. 1 ( It is assumed that an “RF” in b)) and an LED 53 (“OPT” in FIG. 1B) indicating the reception state of the optical signal are provided.

(Configuration-Speaker)
Returning to FIG. 2, the speaker 60 is an alarm unit that outputs an alarm sound based on control by the control unit 70, and for example, a known speaker can be used.

(Configuration-control unit)
The control unit 70 is a control unit that controls each unit of the optical line termination device 1. Specifically, the control unit 70 is a CPU, various programs that are interpreted and executed on the CPU (a basic control program such as an OS, and the OS). And a computer configured to include an internal memory such as a RAM for storing programs and various data.

  The control unit 70 includes a detection unit 71 and an output control unit 72 in terms of functional concept. The detection unit 71 is detection means for detecting the reception level of the optical signal in the optical line termination device 1. The output control unit 72 is a control unit that controls the display unit 50 and the speaker 60. Details of processing executed by each component of the control unit 70 will be described later.

(processing)
Next, processing executed by the optical network unit 1 configured as described above will be described. FIG. 3 is a flowchart showing a schematic example of a display process executed by the optical network unit 1 (steps are abbreviated as “S” in the description of each process below). This process is activated when, for example, the optical line terminating device 1 is powered on.

  When the display process is activated, the output control unit 72 determines whether it is time to display information corresponding to the reception level of the optical signal detected by the detection unit 71 on the display unit 50 (SA1). For example, when the determination is made first after the optical line termination device 1 is turned on, when the RF signal is output for the first time from the state where the RF signal is not output from the PD 20, or when a known operation means ( When an instruction input for displaying the reception level of the optical signal is made via (not shown), an output control unit is provided when a switch for detecting the opening of the cover unit 12 is provided and the opening of the cover unit 12 is detected. 72 is determined to be the timing at which information corresponding to the reception level of the optical signal detected by the detection unit 71 should be displayed on the display unit 50.

  As a result of SA1, when it is determined that it is time to display the information corresponding to the reception level of the optical signal detected by the detection unit 71 on the display unit 50 (SA1, Yes), the detection unit 71 is the PD 20 Based on the converted RF signal, the reception level of the optical signal in the optical line terminating device 1 is detected (SA2). For example, the detection unit 71 performs A / D conversion on the voltage of the RF signal output from the PD 20 and detects the reception level of the optical signal based on the A / D conversion value.

  Subsequently, the output control unit 72 determines whether the reception level of the optical signal detected by the detection unit 71 in SA2 is equal to or greater than a predetermined threshold (SA3). For example, when an optical signal including a TV signal is received by the PD 20, the minimum reception level (for example, −20 dBm) at which an image can be displayed on the TV receiver based on the TV signal is set as a predetermined threshold.

  As a result, when the reception level of the optical signal detected by the detection unit 71 is equal to or higher than a predetermined threshold (SA3, Yes), the output control unit 72 outputs the optical signal detected by the detection unit 71 in SA2. Information corresponding to the reception level is displayed on the display unit 50 (SA4). As the display unit 50 for displaying information corresponding to the reception level of the optical signal, for example, an “OPT” LED 53 in FIG. 1B is used.

  FIG. 4 is a diagram illustrating a display pattern by the display unit 50 according to the first embodiment. As shown in FIG. 4, for example, the output control unit 72 causes the “OPT” LED 53 to blink or the like at the number of times corresponding to the reception level of the optical signal detected by the detection unit 71. That is, for example, when the reception level S is less than −8 dBm, the “OPT” LED 53 is turned off. Further, when the reception level S is -8 dBm or more and less than -7 dBm, the "OPT" LED 53 is blinked six times at a predetermined cycle and then lit. When the reception level S is -7 dBm or more and less than -6 dBm, the “OPT” LED 53 blinks five times at a predetermined cycle and then lit. When the reception level S is -6 dBm or more and less than -5 dBm, the “OPT” LED 53 blinks four times at a predetermined cycle and then lit. When the reception level S is not less than −5 dBm and less than −4 dBm, the “OPT” LED 53 is blinked three times at a predetermined cycle and then lit. When the reception level S is not less than −4 dBm and less than −3 dBm, the “OPT” LED 53 is blinked twice at a predetermined cycle and then lit. When the reception level S is -3 dBm or more and less than -2 dBm, the “OPT” LED 53 is blinked once in a predetermined cycle and then lit. When the reception level S is −2 dBm or more and less than −1 dBm, the “OPT” LED 53 is turned on. When the reception level S is −1 dBm or more, the “OPT” LED 53 is blinked 12 times in a cycle twice the predetermined cycle and then lit. As described above, the operator can easily confirm the reception level of the optical signal in the optical line terminating device 1 by blinking the LED 53 of “OPT” at the number of times corresponding to the reception level.

  Returning to FIG. 3, in SA3, when the reception level of the optical signal detected by the detection unit 71 is not equal to or higher than the predetermined threshold (when it is lower than the predetermined threshold) (SA3, No), the output control unit 72 Causes the display unit 50 to display information indicating that the optical signal reception level is less than the predetermined threshold (SA5). For example, the output control unit 72 repeats the operation of blinking the “OPT” LED 53 three times at a predetermined cycle and then lighting it for a predetermined time.

  Further, the output control unit 72 outputs an alarm sound from the speaker 60 (SA6). As the alarm sound, for example, a buzzer sound is output, or a sound stored in advance in a memory or the like (for example, “the reception level of the optical signal is less than a threshold”) is output.

  If it is determined in SA1 that the timing corresponding to the reception level of the optical signal detected by the detection unit 71 is not to be displayed on the display unit 50 (SA1, No), the output control unit 72 determines that the optical line It is assumed that it is time to display information on the state of the terminating device 1 on the display unit 50, and information on the state of the optical line terminating device 1 is displayed on the display unit 50 (SA7). For example, the output control unit 72 determines that the reception level of the optical signal is a predetermined threshold (for example, when an optical signal including a TV signal is received by the PD 20, the minimum displayable video on the TV receiver based on the TV signal) If it is less than the reception level (for example, −20 dBm), the “OPT” LED 53 in FIG. 1B is turned off, and if the optical signal reception level is equal to or higher than a predetermined threshold, the “OPT” LED 53 is turned off. Lights up. Further, as a premise for executing the display processing, since the power state of the optical line termination device 1 is ON, the LED 51 of “PWR” in FIG. When the RF signal is output from the output terminal 40, the “RF” LED 52 is turned on, and when the RF signal is not output from the output terminal 40, the “RF” LED 52 is turned off.

  After executing the process of SA4, SA6, or SA7, the output control unit 72 returns to SA1.

(effect)
As described above, according to the first embodiment, information corresponding to the reception level of the optical signal detected by the detection unit 71 is displayed on the display unit 50, so that the operator does not prepare a separate optical power meter or the like. The reception level of the optical signal in the optical line termination device 1 can be easily confirmed via the display unit 50 of the optical line termination device 1 itself, and the installation work of the optical line termination device 1 can be further simplified. . In addition, when the optical signal level is checked for maintenance after installation of the optical line terminator 1, the display unit of the optical line terminator 1 itself is removed without removing the optical line terminator 1 from the optical transmission line. The reception level of the optical signal in the optical line termination device 1 can be easily confirmed via the line 50, and the work cost can be further reduced.

  In particular, since the display unit 50 blinks at the number of times corresponding to the reception level of the optical signal detected by the detection unit 71, various reception levels of the optical signal can be displayed on the display unit 50 by a simple method. . In addition, the worker can easily confirm the reception level of the optical signal only by confirming the number of blinks of the display unit 50.

  In addition, when it is time to display information corresponding to the reception level of the optical signal detected by the detection unit 71 on the display unit 50, information corresponding to the reception level of the optical signal is displayed on the display unit 50, When it is time to display information on the state of the terminating device 1 on the display unit 50, information on the state of the optical line terminating device 1 is displayed on the display unit 50. Therefore, information corresponding to the reception level of the optical signal, and the optical line Information regarding the state of the terminal device 1 can be displayed on the common display unit 50 (“OPT” LED 53 in the above-described embodiment) according to the timing. Therefore, it is not necessary to separately provide a display unit 50 for displaying information corresponding to the reception level of the optical signal, and the configuration of the optical line terminating device 1 can be prevented from becoming complicated.

  Further, when the reception level of the optical signal detected by the detection unit 71 is less than a predetermined threshold value, information indicating that the reception level of the optical signal is less than the predetermined threshold value is displayed on the display unit 50. In addition to the above-described effects, for example, when the optical signal includes a TV signal, the user is informed that the optical signal reception level has not reached the minimum reception level at which an image can be displayed on the TV receiver based on the TV signal. Can be notified.

  In addition, since the alarm sound is output from the speaker 60 when the reception level of the optical signal detected by the detection unit 71 is less than a predetermined threshold, in addition to the above-described effects, for example, the optical signal includes a TV signal. In this case, it is possible to notify the user that the reception level of the optical signal has not reached the minimum reception level at which video can be displayed on the TV receiver based on the TV signal.

[Embodiment 2]
Next, a second embodiment will be described. This form is a form in which the display means blinks in a color weighted based on the reception level of the optical signal detected by the detection means. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment, unless otherwise specified. The same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(Configuration-display section)
First, the configuration of the optical line termination device 1 according to the second embodiment will be described. The display unit 50 can be displayed in a display mode according to the reception level of the optical signal detected by the detection unit, and uses, for example, a three-color LED (for example, an LED that emits light in green, orange, or red). It is configured.

(processing)
Next, processing executed by the optical network unit 1 according to the second embodiment configured as described above will be described. The flowchart of the display process executed by the optical network unit 1 according to the second embodiment is substantially the same as the flowchart according to the first embodiment shown in FIG. Here, SA1-SA2 and SA5-SA7 in this display process are the same as SA1-SA2 and SA5-SA7 in the process of the first embodiment shown in FIG.

  In the process of SA3, when the reception level of the optical signal detected by the detection unit 71 is equal to or higher than a predetermined threshold (SA3, Yes), the output control unit 72 is detected by the detection unit 71 in SA2. Information corresponding to the reception level of the optical signal is displayed on the display unit 50 (SA4).

  FIG. 5 is a diagram illustrating the relationship between the color displayed on the display unit 50 and the weighting per blinking. FIG. 6 is a diagram illustrating a display pattern by the display unit 50 according to the second embodiment. As shown in FIG. 6, for example, the output control unit 72 blinks the “OPT” LED 53 in a color weighted based on the reception level of the optical signal detected by the detection unit 71. Here, “blink with a color weighted based on the reception level of the optical signal” means that the reception level of the optical signal indicated by one flash of the display unit 50 is the color that performs the flashing. It means to change by. Specifically, as shown in FIG. 5, the blinking of the green LED in the display unit 50 per time is the reception level of the minimum unit of the optical signal (here, the display unit 50 in the first embodiment once). The same as the reception level indicated by flashing per unit), the flashing of the orange LED in the display unit 50 per time is three times the reception level of the minimum unit of the optical signal, and per red LED in the display unit 50 The blinking indicates 5 times the reception level of the minimum unit of the optical signal. In other words, the blinking of the orange LED in the display unit 50 per one time shows the same reception level as the blinking of the green LED in the display unit 50 three times, and the red LED in the display unit 50 per one time. The blinking indicates the same reception level as the blinking of the green LED in the display unit 50 per five times.

  Specifically, as shown in FIG. 6, when the reception level S is less than −8 dBm, the “OPT” LED 53 is turned off. In addition, when the reception level S is -8 dBm or more and less than -7 dBm, in the first embodiment, the “OPT” LED 53 is blinked six times at a predetermined cycle and then turned on. The LED 53 of “OPT” blinks twice at a predetermined cycle (red once, green once) and then lights up (green) (in this way, blinking once red + one green blinks green 56 times. The same reception level as flashing of). Similarly, when the reception level S is not less than −7 dBm and less than −6 dBm, the “OPT” LED 53 is blinked (red) once in a predetermined cycle and then lit (green). When the reception level S is -6 dBm or more and less than -5 dBm, the LED 53 of “OPT” blinks twice (once orange and once on green) and then lights up (green). When the reception level S is -5 dBm or more and less than -4 dBm, the “OPT” LED 53 blinks (orange) once in a predetermined cycle and then lights (green). When the reception level S is not less than −4 dBm and less than −3 dBm, the “OPT” LED 53 is blinked (green) twice in a predetermined cycle and then turned on (green). When the reception level S is not less than −3 dBm and less than −2 dBm, the “OPT” LED 53 is blinked (green) once in a predetermined cycle and then turned on (green). Further, when the reception level S is −2 dBm or more and less than −1 dBm, the “OPT” LED 53 is turned on (green). Further, when the reception level S is −1 dBm or more, the “OPT” LED 53 is blinked (green) 12 times in a cycle twice the above-mentioned predetermined cycle and then lit (green). In this manner, the operator can optically terminate the optical line termination device by blinking the LED 53 of “OPT” corresponding to the reception level with a color weighted based on the reception level of the optical signal detected by the detection unit 71. 1 can more easily confirm the reception level of the optical signal.

(effect)
As described above, according to the second embodiment, since the display unit 50 blinks with a color weighted based on the reception level of the optical signal detected by the detection unit 71, the reception level of the optical signal is simplified and simplified. It is possible to display accurately, and the operator can more easily confirm the reception level of the optical signal in the optical line termination device 1.

[Embodiment 3]
Next, Embodiment 3 will be described. In this mode, when the reception level of the optical signal detected by the detection unit is greater than or equal to a predetermined threshold value, the display unit blinks in a color corresponding to the state of the optical signal reception level. The configuration of the third embodiment is substantially the same as the configuration of the second embodiment, unless otherwise specified, and the configuration substantially the same as the configuration of the second embodiment is used in the second embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(processing)
Next, processing executed by the optical network unit 1 according to Embodiment 3 configured as described above will be described. The flowchart of the display process executed by the optical network unit 1 according to the third embodiment is substantially the same as the flowchart according to the first embodiment shown in FIG. Here, SA1-SA2 and SA5-SA7 in this display process are the same as SA1-SA2 and SA5-SA7 in the process of the first embodiment shown in FIG.

  After the process of SA2, when the reception level of the optical signal detected by the detection unit 71 is equal to or higher than a predetermined threshold (SA3, Yes), the output control unit 72 detects the light detected by the detection unit 71 at SA2. Information corresponding to the reception level of the signal is displayed on the display unit 50 (SA4).

  FIG. 7 is a diagram illustrating a display pattern by the display unit 50 according to the third embodiment. As shown in FIG. 7, the output control unit 72 sets the LED 53 of “OPT” in a color according to the state of the reception level of the optical signal detected by the detection unit 71 (referred to as a reception level classification here). Make it blink. Here, the “color according to the optical signal reception level category” means a color set for each optical signal reception level category. For example, the reception level category (here, three categories) Of these, red indicates a low level classification (for example, reception level is less than −6 dBm), orange indicates a medium level classification (for example, reception level is −6 dBm or more and less than −3 dBm), and high level classification (for example, reception level) Corresponds to green indicating -3 dBm or more).

  Specifically, as shown in FIG. 7, when the reception level S is less than −8 dBm, the “OPT” LED 53 is blinked (red) three times at a predetermined cycle and then lit (green). When the reception level S is -8 dBm or more and less than -7 dBm, the "OPT" LED 53 blinks (red) twice in a predetermined cycle and then lights (green). When the reception level S is not less than −7 dBm and less than −6 dBm, the “OPT” LED 53 blinks (red) once in a predetermined cycle and then lights (green). When the reception level S is -6 dBm or more and less than -5 dBm, the “OPT” LED 53 blinks (orange) three times at a predetermined cycle and then lights (green). When the reception level S is -5 dBm or more and less than -4 dBm, the “OPT” LED 53 is blinked (orange) twice in a predetermined cycle and then lit (green). Further, when the reception level S is not less than −4 dBm and less than −3 dBm, the “OPT” LED 53 is blinked (orange) once in a predetermined cycle and then turned on (green). Further, when the reception level S is not less than −3 dBm and less than −2 dBm, the “OPT” LED 53 is blinked (green) three times at a predetermined cycle and then turned on (green). When the reception level S is −2 dBm or more and less than −1 dBm, the “OPT” LED 53 blinks (green) twice in a predetermined cycle and then lights (green). When the reception level S is −1 dBm or more, the “OPT” LED 53 blinks once (green) at a predetermined cycle and then lights (green). In this way, by blinking the display unit 50 with a color corresponding to the classification of the reception level of the optical signal detected by the detection unit 71, the operator can detect the reception level of the optical signal in the optical line terminating device 1 and the light. The classification of the signal reception level can be easily confirmed.

(effect)
As described above, according to the third embodiment, since the display unit 50 blinks in a color corresponding to the classification of the reception level of the optical signal detected by the detection unit 71, simultaneously with the reception level of the optical signal, The reception level classification can also be displayed on the display unit 50, and the operator can easily confirm the reception level of the optical signal and the classification of the reception level in the optical line termination device 1.

[Embodiment 4]
Next, a fourth embodiment will be described. In this mode, when the reception level of the optical signal detected by the detection unit is equal to or higher than a predetermined threshold, the display unit corresponding to the state of the reception level of the optical signal is blinked. The configuration of the fourth embodiment is substantially the same as the configuration of the second embodiment unless otherwise specified, and the configuration substantially the same as the configuration of the second embodiment is used in the second embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(processing)
Next, processing executed by the optical network unit 1 according to Embodiment 4 configured as described above will be described. The flowchart of the display process executed by the optical network unit 1 according to the fourth embodiment is substantially the same as the flowchart according to the first embodiment shown in FIG. Here, SA1-SA2 and SA5-SA7 in this display process are the same as SA1-SA2 and SA5-SA7 in the process of the first embodiment shown in FIG.

  After the process of SA2, when the reception level of the optical signal detected by the detection unit 71 is equal to or higher than a predetermined threshold (SA3, Yes), the output control unit 72 detects the light detected by the detection unit 71 at SA2. Information corresponding to the reception level of the signal is displayed on the display unit 50 (SA4).

  FIG. 8 is a diagram illustrating a display pattern by the display unit 50 according to the fourth embodiment. As shown in FIG. 8, the output control unit 72 causes the display unit 50 to blink according to the state of the reception level of the optical signal detected by the detection unit 71 (referred to herein as a reception level category). Here, the “display unit according to the optical signal reception level category” is set for each optical signal reception level category, and is one of the three LEDs constituting the display unit 50. Means LED. For example, among the reception level classifications (here, three classifications), an “OPT” LED 53 indicating a low level classification (for example, reception level is less than −6 dBm), and a medium level classification (for example, reception level is −6 dBm) The “RF” LED 52 indicating the above (less than −3 dBm), the “PWR” LED 51 indicating the high level classification (for example, the reception level is −3 dBm or more), and the like.

  Specifically, as shown in FIG. 8, when the reception level S is less than −8 dBm, the “OPT” LED 53 is blinked three times at a predetermined period and then turned on. Further, when the reception level S is -8 dBm or more and less than -7 dBm, the "OPT" LED 53 blinks twice at a predetermined cycle and then lit. When the reception level S is -7 dBm or more and less than -6 dBm, the “OPT” LED 53 blinks once in a predetermined cycle and then lit. When the reception level S is -6 dBm or more and less than -5 dBm, the “RF” LED 52 is blinked three times at a predetermined cycle and then lit. When the reception level S is not less than −5 dBm and less than −4 dBm, the “RF” LED 52 is blinked twice at a predetermined cycle and then lit. When the reception level S is not less than −4 dBm and less than −3 dBm, the “RF” LED 52 is blinked once in a predetermined cycle and then lit. When the reception level S is -3 dBm or more and less than -2 dBm, the “PWR” LED 51 is blinked three times at a predetermined cycle and then lit. When the reception level S is −2 dBm or more and less than −1 dBm, the “PWR” LED 51 is blinked twice at a predetermined cycle and then lit. When the reception level S is −1 dBm or more, the “PWR” LED 51 blinks once in a predetermined cycle and then lit. In this way, by blinking the display unit 50 according to the classification of the reception level of the optical signal detected by the detection unit 71, the operator can receive the optical signal reception level and the optical signal in the optical line termination device 1. The reception level classification can be easily confirmed.

(effect)
As described above, according to the fourth embodiment, since the display unit 50 blinks according to the classification of the reception level of the optical signal detected by the detection unit 71, the reception of the optical signal is performed simultaneously with the reception level of the optical signal. The level classification can also be displayed on the display unit 50, and the operator can easily confirm the classification of the optical signal reception level and the optical signal reception level in the optical line terminating device 1.

[Embodiment 5]
Next, a fifth embodiment will be described. In this form, the display means is blinked in a manner corresponding to the state of the reception level of the optical signal detected by the detection means. The configuration of the fifth embodiment is substantially the same as the configuration of the second embodiment, unless otherwise specified. The same configuration as that of the second embodiment is used in the second embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(processing)
Next, processing executed by the optical network unit 1 according to the fifth embodiment configured as described above will be described. The flowchart of the display process executed by the optical network unit 1 according to the fifth embodiment is substantially the same as the flowchart according to the first embodiment shown in FIG. However, in this display process, the processes SA3 and SA5-SA6 are not performed. Note that SA1-SA2 in this display process is the same as SA1-SA2 in the process of the first embodiment shown in FIG.

  After the processing of SA2, the output control unit 72 causes the display unit 50 to display information corresponding to the reception level of the optical signal detected by the detection unit 71 in SA2 (SA4).

  FIG. 9 is a diagram illustrating a display pattern by the display unit 50 according to the fifth embodiment. As shown in FIG. 9, for example, the output control unit 72 blinks the “OPT” LED 53 in a manner corresponding to the state of the reception level of the optical signal detected by the detection unit 71. Here, the “mode according to the state of the reception level of the optical signal” means the color set for each state of the reception level of the optical signal, the location of the display unit 50, and the like (here, the color will be described). ). For example, the optical signal reception level state (for example, the reception level is less than −20 dBm) is orange, and the optical signal reception level state is appropriate (for example, the reception level is −20 dBm or more and less than −1 dBm). Green indicating that the reception level of the optical signal is excessive (for example, red indicating that the reception level is −1 dBm or more).

  Specifically, as shown in FIG. 9, every time the reception level of the optical signal changes by 1 dBm, the LED 53 of “OPT” is displayed in a color corresponding to the state of the reception level of the optical signal while changing the number of blinks by one. Blinks. That is, when the reception level of the optical signal is too low and the reception level S is -21 dBm or more and less than -20 dBm, the “OPT” LED 53 blinks once (orange) at a predetermined cycle and then lights up. (Green). Then, when the reception level S is less than −21 dBm, the LED 53 of “OPT” blinks a predetermined number of times (orange) at a predetermined cycle while increasing the number of flashes by one every time the reception level S decreases by 1 dBm. Lights up (green) (In FIG. 9, regarding the range when the optical signal reception level is too low, the above-described reception level S is −21 dBm or more and less than −20 dBm, and the reception level S is −25 dBm or more− The blinking pattern is illustrated only for the case of less than 24 dBm, and the illustration is omitted for other cases).

  Further, when the optical signal reception level is appropriate and the reception level S is −2 dBm or more and less than −1 dBm, the “OPT” LED 53 blinks once (green) at a predetermined cycle and then lights up. (Green). When the reception level S is -20 dBm or more and less than -2 dBm, the LED 53 of “OPT” blinks (green) a predetermined number of times at a predetermined cycle while increasing the number of flashes by one every time the reception level S decreases by 1 dBm. Then, it is turned on (green) (in FIG. 9, regarding the range in which the state of the optical signal reception level is appropriate, the reception level S is −2 dBm or more and less than −1 dBm, and the reception level S is − A blinking pattern is illustrated only for the case of 6 dBm or more and less than −5 dBm, and only when the reception level S is −20 dBm or more and less than −19 dBm, and the illustration is omitted in other cases).

  Further, when the reception level of the optical signal is excessive and the reception level S is −1 dBm or more and less than 0 dBm, the “OPT” LED 53 blinks once (red) at a predetermined cycle and then lights up ( Green). When the reception level S is 0 dBm or more, every time the reception level S increases by 1 dBm, the number of blinks is increased by one, and the “OPT” LED 53 blinks a predetermined number of times (red) and then lights up (In FIG. 9, regarding the range when the optical signal reception level is excessive, the above-mentioned reception level S is −1 dBm or more and less than 0 dBm, and the reception level S is 3 dBm or more and less than 4 dBm. Only the blinking pattern is illustrated, and illustration is omitted in other cases).

  In this way, the operator can light the optical signal reception level in the optical line terminal device 1 by blinking the “OPT” LED 53 with a color corresponding to the state of the optical signal reception level detected by the detection unit 71. And the state of the reception level of the optical signal can be easily confirmed.

(effect)
As described above, according to the fifth embodiment, since the display unit 50 blinks in a color corresponding to the state of the optical signal reception level detected by the detection unit 71, the optical signal simultaneously with the optical signal reception level. The reception level state of the optical signal can also be displayed on the display unit 50, and the operator can easily check the reception level of the optical signal and the reception level of the optical signal in the optical line terminating device 1.

[Embodiment 6]
Next, a sixth embodiment will be described. In this form, when the display means is blinked a plurality of times, the last blink is blinked in a manner different from the other blinks. The configuration of the sixth embodiment is substantially the same as the configuration of the second embodiment unless otherwise specified, and the same configuration as that of the second embodiment is used in the second embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(processing)
Next, processing executed by the optical network unit 1 according to Embodiment 6 configured as described above will be described. The flowchart of the display process executed by the optical network unit 1 according to the sixth embodiment is substantially the same as the flowchart according to the first embodiment shown in FIG. Here, SA1-SA2 and SA5-SA7 in this display process are the same as SA1-SA2 and SA5-SA7 in the process of the first embodiment shown in FIG.

  After the process of SA2, when the reception level of the optical signal detected by the detection unit 71 is equal to or higher than a predetermined threshold (SA3, Yes), the output control unit 72 detects the light detected by the detection unit 71 at SA2. Information corresponding to the reception level of the signal is displayed on the display unit 50 (SA4).

  FIG. 10 is a diagram illustrating a display pattern by the display unit 50 according to the sixth embodiment. As shown in FIG. 10, for example, when the output control unit 72 causes the display unit 50 to blink a plurality of times, the output control unit 72 has a color corresponding to the reception level of the optical signal detected by the detection unit 71. Then, the “OPT” LED 53 is caused to blink, and the “OPT” LED 53 is caused to blink in a manner different from the last blinking. Here, “different modes” refers to switching between different colors (for example, changing the blinking color of the LED 53) or different locations (for example, the LED 51 for “PWR”, the LED 52 for “RF”, and the LED 53 for “OPT”). ) Etc. Hereinafter, a case where different colors are used will be described.

  Specifically, when the LED 53 for “OPT” blinks a plurality of times, the LED 53 for “OPT” blinks in a color different from the other times in the last time among the plurality of times. However, if the number of blinks is not plural (if it is one), it is assumed that there is no “last round” and the last round color is not blinked. That is, as shown in FIG. 10, when the reception level state of the optical signal is too low, the “OPT” LED 53 does not blink a plurality of times when the reception level S is −21 dBm or more and less than −20 dBm. LED 53 blinks once (orange) at a predetermined cycle and then lights up (green). When the reception level S is less than -21 dBm, the LED 53 “OPT” blinks a predetermined number of times (orange) at a predetermined cycle while increasing the number of blinks by one every time the reception level S decreases by 1 dBm. Flashing (red) with a different color only at the last of a predetermined number of times, and then lighting (green) in FIG. 10 (in FIG. 10, regarding the range when the optical signal reception level is too low, the above-described reception level S is used. The flashing pattern is exemplified only when -21 dBm or more and less than -20 dBm and when the reception level S is -25 dBm or more and less than -24 dBm, and illustration is omitted in other cases.

  When the optical signal reception level is appropriate and the reception level S is not less than −2 dBm and less than −1 dBm, the “OPT” LED 53 is not blinked a plurality of times. Blink once (green) and then turn on (green). When the reception level S is not less than −20 dBm and less than −2 dBm, the “OPT” LED 53 blinks a predetermined number of times (green) while increasing the number of blinks by one every time the reception level S decreases by 1 dBm. At the same time, only the last of the predetermined number of times is blinked (red) and then turned on (green) (in FIG. 10, the range when the optical signal reception level is appropriate has been described above. Illustrated blinking patterns only when the reception level S is −2 dBm or more and less than −1 dBm, the reception level S is −6 dBm or more and less than −5 dBm, and the reception level S is −20 dBm or more and less than −19 dBm. In this case, the illustration is omitted). Note that, when the optical signal reception level is excessive, the same flashing as in the fifth embodiment is performed, and thus the description thereof is omitted.

  As described above, when the display unit 50 is blinked a plurality of times, the operator blinks the display unit 50 last time by blinking the display unit 50 in a manner different from the last blinking. Can be easily confirmed.

(effect)
As described above, according to the sixth embodiment, when the display unit 50 is caused to blink a plurality of times, the last blinking is caused to blink in a manner different from the other blinks. The fact that it is blinking can be displayed on the display unit 50 in an identifiable manner, and the operator can easily confirm that the blinking of the display unit 50 is the last time.

[Embodiment 7]
Next, a seventh embodiment will be described. In this embodiment, the display unit blinks at the number of times corresponding to the reception level of the optical signal before or after the information corresponding to the reception level state of the optical signal detected by the detection unit is displayed on the display unit. It is a form to be made. The configuration of the seventh embodiment is substantially the same as the configuration of the second embodiment, unless otherwise specified, and the configuration substantially the same as the configuration of the second embodiment is used in the second embodiment. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

(processing)
Next, processing executed by the optical network unit 1 according to the seventh embodiment configured as described above will be described. FIG. 11 is a flowchart showing a schematic example of display processing executed by the optical network unit 1 according to the seventh embodiment. Here, SB1-SB2 and SB6 in this display process are the same as SA1-SA2 and SA7 in the process of the first embodiment shown in FIG.

  After the process of SB2, the output control unit 72 causes the display unit 50 to display information related to the state of the reception level of the optical signal detected by the detection unit 71 in SB2 (SB3). Here, in the display of “information regarding the reception level state of the optical signal”, for example, the output control unit 72 displays the display unit 50 when the reception level state is too low (for example, the reception level is less than −20 dBm). Is displayed in orange, and when the reception level is appropriate (for example, the reception level is -20 dBm or more and less than -1 dBm), the display unit 50 is displayed in green, and the reception level is excessive (for example, the reception level is -1 dBm or more), the display unit 50 is displayed in red.

  Next, after a predetermined time (for example, 3 seconds) has elapsed (SB4), the output control unit 72 causes the display unit 50 to display information corresponding to the reception level of the optical signal detected by the detection unit 71 in SA2 (SB5). .

  FIG. 12 is a diagram illustrating a display pattern by the display unit 50 according to the seventh embodiment. In the process of SB5, as shown in FIG. 12, for example, the output control unit 72 blinks the LED 53 of “OPT” for the number of times corresponding to the reception level of the optical signal detected by the detection unit 71.

  Specifically, as shown in FIG. 12, when the reception level S is −25 dBm or more and less than −24 dBm, the “OPT” LED 53 blinks (green) five times at a predetermined cycle, and then lights (green). Let When the reception level S is -6 dBm or more and less than -5 dBm, the LED 53 “OPT” blinks (green) five times at a predetermined cycle and then lights (green). When the reception level S is 3 dBm or more and less than 4 dBm, the “OPT” LED 53 is blinked (green) five times at a predetermined cycle and then lit (green). As described above, after the information corresponding to the reception level state of the optical signal detected by the detection unit 71 is displayed on the LED 53 of “OPT”, the “OPT” of the number of times corresponding to the reception level of the optical signal is displayed. By blinking the LED 53, the operator can easily confirm the state of the optical signal reception level and the optical signal reception level in the optical line terminating device 1.

  Note that the timing for displaying the information related to the state of the reception level of the optical signal is not limited to this. For example, the display unit 50 is displayed at the number of times corresponding to the reception level of the optical signal detected by the detection unit 71 in SB2. The information regarding the state of the reception level of the optical signal may be displayed after blinking and after a predetermined time has elapsed.

(effect)
As described above, according to the seventh embodiment, the information corresponding to the state of the reception level of the optical signal detected by the detection unit 71 is displayed on the display unit 50 before or after the information is displayed. Since the display unit 50 blinks at the corresponding number of times, the optical signal reception level can be displayed on the display unit 50 before or after the optical signal reception level state is displayed on the display unit 50. The operator can easily confirm the optical signal reception level and the optical signal reception level in the optical line termination device 1.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. it can. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the display)
In the first embodiment, the case where information corresponding to the optical signal reception level is displayed using the “OPT” LED 53 indicating the optical signal reception state has been described as an example. However, the information corresponding to the optical signal reception level is described. A dedicated display unit 50 for displaying the image may be separately provided. In this case, as the dedicated display unit 50 for displaying information corresponding to the reception level of the optical signal, for example, one LED may be provided, or two or more LEDs may be provided. Furthermore, when two or more LEDs are provided, LEDs of a plurality of colors (for example, red, green, white, etc.) are provided, and each LED blinks with a combination of colors corresponding to the reception level of the optical signal. May be.

(About display processing)
The display of information corresponding to the reception level of the optical signal described in each embodiment can be combined in any combination. For example, the display of information corresponding to the reception level in the sixth embodiment and the seventh embodiment may be combined. Specifically, the output control unit 72 causes the display unit 50 to display information on the reception level state of the optical signal detected by the detection unit 71 in SB2 (SB3), and after a predetermined time has passed (SB4), When the output control unit 72 causes the display unit 50 to blink a plurality of times, information corresponding to the reception level of the optical signal detected by the detection unit 71 in SB2 is displayed on the display unit 50, and the last blinking is performed. The LED 53 may be blinked in a manner different from other blinks (for example, when the reception level S is -25 dBm or more and less than -24 dBm, the “OPT” LED 53 blinks once (orange). After a predetermined time has elapsed, the LED 53 of “OPT” blinks four times (green) at a predetermined cycle, then blinks once (red), and then lights (green) (SB5).

  In the first embodiment, when the reception level of the optical signal detected by the detection unit 71 is less than a predetermined threshold value (SA3, No) in the display process of FIG. 3, the reception level of the optical signal is predetermined. It has been described that information indicating that it is less than the threshold value is displayed on the display unit 50 (SA5), an alarm sound is output from the speaker 60 (SA6), and then the process returns to SA1, but the optical signal reception level is once predetermined. If the optical signal reception level subsequently becomes equal to or higher than the predetermined threshold value, information indicating that the optical signal reception level has subsequently become lower than the predetermined threshold value is displayed on the display unit 50. The alarm sound may be output from the speaker 60. Accordingly, it is possible to notify the user that there is a possibility that some trouble has occurred in the reception of the optical signal. In this case, for example, when the display of information indicating that the reception level of the optical signal is less than a predetermined threshold or the instruction input indicating that the output of the alarm sound should be canceled is received via the operation unit, the information The display of the alarm and the output of the alarm sound may be stopped.

  In the second embodiment, the display pattern by the display unit 50 shown in FIG. 6 is not limited to this. For example, the output control unit 72 has a number corresponding to the reception level of the optical signal detected by the detection unit 71. The display element (here, LED) may be blinked. Here, the “number according to the reception level of the optical signal” means the number of display elements set for each reception level of the optical signal. For example, three blinks of the “OPT” LED 53 are equivalent to one blink of the “RF” LED 52 and one of the “OPT” LED 53, and five blinks of the “OPT” LED 53 are the “PWR” LEDs 51. , “RF” LED 52 and “OPT” LED 53 correspond to one-time flashing. Specifically, when the reception level S is less than −8 dBm, all the LEDs are turned off as in the second embodiment. When the reception level S is -8 dBm or more and less than -7 dBm, the “PWR” LED 51, the “RF” LED 52, and the “OPT” LED 53 blink simultaneously once in a predetermined cycle, and then “OPT”. LED 53 blinks, and then LED “OPT” 53 is turned on. When the reception level S is -7 dBm or more and less than -6 dBm, the “PWR” LED 51, the “RF” LED 52, and the “OPT” LED 53 are simultaneously blinked once in a predetermined cycle, and then “OPT”. LED 53 is turned on. When the reception level S is -6 dBm or more and less than -5 dBm, the “RF” LED 52 and the “OPT” LED 53 are simultaneously blinked once in a predetermined cycle, and then the “OPT” LED 53 is blinked. After that, the “OPT” LED 53 is turned on. When the reception level S is not less than −5 dBm and less than −4 dBm, the “RF” LED 52 and the “OPT” LED 53 are simultaneously blinked once in a predetermined cycle, and then the “OPT” LED 53 is turned on. When the reception level S is not less than −4 dBm and less than −3 dBm, the “OPT” LED 53 is simultaneously blinked twice in a predetermined cycle, and then the “OPT” LED 53 is turned on. When the reception level S is not less than −3 dBm and less than −2 dBm, the “OPT” LED 53 blinks once in a predetermined cycle, and then the “OPT” LED 53 is turned on. When the reception level S is −2 dBm or more and less than −1 dBm, the “OPT” LED 53 is turned on. When the reception level S is −1 dBm or more, the “OPT” LED 53 is blinked 12 times in a cycle twice the predetermined cycle and then lit. In this way, by blinking the number of display elements corresponding to the reception level of the optical signal detected by the detection unit 71, the operator can more easily check the reception level of the optical signal in the optical line termination device 1. can do.

  Further, in the sixth embodiment, the display pattern by the display unit 50 shown in FIG. 10 is not limited to this. For example, the output control unit 72 has a number of times corresponding to the reception level of the optical signal detected by the detection unit 71. While blinking the LED 53 of “OPT”, the number of blinking elements (here, LEDs) different from the blinking of the other times may be blinked. Specifically, when the reception level S is −25 dBm or more and less than −24 dBm, the “OPT” LED 53 blinks four times at a predetermined cycle, then the “PWR” LED 51, the “RF” LED 52, and “ The LED 53 of “OPT” may be blinked once at the same time.

In the sixth embodiment, in the display pattern by the display unit 50 shown in FIG. 10, when the LED 53 of “OPT” blinks a plurality of times, the last blinking of the plurality of times is different from the other times. Although it has been described that the LED 53 “OPT” blinks in color, the present invention is not limited to this. For example, after blinking the “OPT” LED 53 by the number of times corresponding to the reception level of the optical signal, the “OPT” LED 53 may be blinked in a different color in order to notify that the blink has ended. Good. Specifically, when the reception level S is −25 dBm or more and less than −24 dBm, the “OPT” LED 53 blinks five times (orange) at a predetermined cycle, then blinks once (red), and then lights up. (Green).
(Appendix)
The optical line terminator according to appendix 1 is an optical line terminator that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electric signal, and includes display means and the optical transmitter. Photoelectric conversion means for converting the optical signal transmitted through the optical transmission path into an electrical signal; and based on the electrical signal converted by the photoelectric conversion means, the optical signal in the optical line termination device Detection means for detecting a reception level, and control means for causing the display means to display information corresponding to the reception level of the optical signal detected by the detection means.
The optical line terminator according to appendix 2 is the optical line terminator according to appendix 1, wherein the display means emits light, and the control means determines the reception level of the optical signal detected by the detection means. The display means is blinked at a corresponding number of times.
The optical line terminator according to appendix 3 is the optical line terminator according to appendix 2, wherein the control means displays the display means in a color corresponding to the reception level of the optical signal detected by the detection means. Blink.
The optical line terminator according to appendix 4, in the optical line terminator according to appendix 3, wherein the control means has the display means in a color weighted based on the reception level of the optical signal detected by the detection means. Blinks.
The optical line termination device according to appendix 5 is the optical line termination apparatus according to any one of appendices 2 to 4, wherein the display means includes a plurality of display elements, and the control means is detected by the detection means. The number of the display elements corresponding to the reception level of the optical signal is blinked.
The optical line terminator according to appendix 6 is the optical line terminator according to any one of appendices 2 to 5, wherein the control means responds to the state of the reception level of the optical signal detected by the detection means. The display means is blinked in the manner described above.
The optical line termination device according to appendix 7 is the optical line termination apparatus according to any one of appendices 2 to 6, wherein when the control means blinks the display means a plurality of times, the control means Blinks in a manner different from other blinks.
The optical line termination device according to appendix 8, in the optical line termination apparatus according to any one of appendices 2 to 7, wherein the control means corresponds to the state of the reception level of the optical signal detected by the detection means. Before or after displaying the information to be displayed on the display means, the display means is blinked at the number of times corresponding to the reception level of the optical signal.
The optical line termination device according to appendix 9, in the optical line termination apparatus according to any one of appendices 1 to 8, wherein the control means is information corresponding to the reception level of the optical signal detected by the detection means. In the case where the display means displays the information corresponding to the reception level of the optical signal on the display means and the information on the state of the optical line terminator is displayed on the display means Then, information related to the state of the optical line terminator is displayed on the display means.
The optical line termination apparatus according to appendix 10, in the optical line termination apparatus according to any one of appendices 1 to 9, wherein the control means has a reception level of the optical signal detected by the detection means that is a predetermined threshold value. If it is less than the threshold, information indicating that the reception level of the optical signal is less than a predetermined threshold is displayed on the display means.
The optical line terminator of appendix 11 is the optical line terminator according to any one of appendices 1 to 10, comprising alarm means for outputting an alarm sound, wherein the control means is detected by the detection means When the reception level of the optical signal is less than a predetermined threshold, an alarm sound is output from the alarm means.
(Additional effects)
According to the optical line terminator described in appendix 1, information corresponding to the reception level of the optical signal detected by the detection unit is displayed on the display unit, so that the operator does not prepare a separate optical power meter or the like. The optical signal reception level in the optical line terminator can be easily confirmed via the display means of the optical line terminator itself, and the installation work of the optical line terminator can be further simplified. Also, when the optical signal level is checked for maintenance after installation of the optical line termination device, the optical line termination device itself is not removed from the optical transmission line via the display means of the optical line termination device itself. The reception level of the optical signal in the optical line terminating device can be easily confirmed, and the operation cost can be further reduced.
According to the optical line terminator described in appendix 2, the display means blinks the number of times corresponding to the reception level of the optical signal detected by the detection means, so that various reception levels of the optical signal can be obtained by a simple method. It can be displayed on the display means. Also, the operator can easily confirm the reception level of the optical signal only by confirming the number of blinks of the display means.
According to the optical line terminator described in appendix 3, the display means corresponding to the reception level of the optical signal is blinked in a color corresponding to the reception level of the optical signal detected by the detection means. The level can be displayed easily and accurately, and the operator can more easily confirm the reception level of the optical signal in the optical line termination device.
According to the optical line termination device of appendix 4, the display means blinks with a color weighted based on the reception level of the optical signal detected by the detection means, so that the reception level of the optical signal can be further simplified and It is possible to display accurately, and the operator can more easily confirm the reception level of the optical signal in the optical line termination device.
According to the optical line termination device described in appendix 5, the number of display elements corresponding to the reception level of the optical signal detected by the detection means is blinked, so that the reception level of the optical signal is displayed easily and accurately. Thus, the operator can more easily check the reception level of the optical signal in the optical line terminating device.
According to the optical line termination device according to appendix 6, the display means blinks in a manner corresponding to the state of the reception level of the optical signal detected by the detection means. The reception level state of the optical signal can also be displayed on the display means, and the operator can easily confirm the optical signal reception level and the optical signal reception level state in the optical line terminating device.
According to the optical line terminator described in appendix 7, when the display unit blinks a plurality of times, the last blinking is caused to blink in a manner different from the other blinks. The fact that it is blinking can be displayed on the display means in an identifiable manner, and the operator can easily confirm that the blinking of the display means is the last time.
According to the optical line termination device of appendix 8, the information corresponding to the state of the optical signal reception level detected by the detection means is displayed on the display means before or after the information is displayed on the display means. Since the display means blinks at the corresponding number of times, the optical signal reception level can be displayed on the display means before or after the optical signal reception level state is displayed on the display means. It is possible to easily confirm the state of the optical signal reception level and the optical signal reception level in the optical line terminator.
According to the optical line termination device described in appendix 9, when the information corresponding to the reception level of the optical signal detected by the detection means is to be displayed on the display means, the information corresponding to the reception level of the optical signal is displayed. In the case of the timing to display on the display means and information on the state of the optical line terminator to be displayed on the display means, information on the state of the optical line terminator is displayed on the display means, so information corresponding to the reception level of the optical signal And information on the state of the optical network unit can be displayed on a common display unit according to the timing. Therefore, it is not necessary to separately provide display means for displaying information corresponding to the reception level of the optical signal, and the configuration of the optical line termination device can be prevented from becoming complicated.
According to the optical line termination device according to attachment 10, when the reception level of the optical signal detected by the detection unit is less than the predetermined threshold, the reception level of the optical signal is less than the predetermined threshold. Since the information to be displayed is displayed on the display means, in addition to the above-described effect, for example, when the optical signal includes a TV signal, the reception level of the optical signal is set to the minimum reception level at which video can be displayed on the TV receiver based on the TV signal It is possible to notify the user that the user has not reached.
According to the optical line termination device described in appendix 11, when the reception level of the optical signal detected by the detection unit is less than a predetermined threshold value, an alarm sound is output from the alarm unit. For example, when the optical signal includes a TV signal, the user can be notified that the optical signal reception level has not reached the minimum reception level at which video can be displayed on the TV receiver based on the TV signal. .

DESCRIPTION OF SYMBOLS 1 Optical line termination device 10 Case 11 Base part 12 Cover part 13 Lead-in port 14 Terminal hole 20 PD
30 Amplifying unit 40 Output terminal 50 Display unit 51, 52, 53 LED
60 Speaker 70 Control Unit 71 Detection Unit 72 Output Control Unit

Claims (3)

An optical line termination device that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electrical signal,
Display means;
Photoelectric conversion means for converting the optical signal transmitted from the optical transmitter via the optical transmission path into an electrical signal;
Detection means for detecting the reception level of the optical signal in the optical line termination device based on the electrical signal converted by the photoelectric conversion means;
Control means for causing the display means to display information corresponding to the reception level of the optical signal detected by the detection means ,
The display means emits light,
The control means includes
Blinking the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means;
Blinking the display means in a color corresponding to the reception level of the optical signal detected by the detection means;
Blinking the display means in a weighted color based on the reception level of the optical signal detected by the detection means;
Optical line termination equipment. An optical line termination device that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electrical signal,
Display means;
Photoelectric conversion means for converting the optical signal transmitted from the optical transmitter via the optical transmission path into an electrical signal;
Detection means for detecting the reception level of the optical signal in the optical line termination device based on the electrical signal converted by the photoelectric conversion means;
Control means for causing the display means to display information corresponding to the reception level of the optical signal detected by the detection means,
The display means emits light and includes a plurality of display elements,
The control means includes
Blinking the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means;
Blinking the number of the display elements corresponding to the reception level of the optical signal detected by the detection means;
Optical line termination equipment. An optical line termination device that receives an optical signal transmitted from an optical transmitter via an optical transmission line and converts the optical signal into an electrical signal,
Display means;
Photoelectric conversion means for converting the optical signal transmitted from the optical transmitter via the optical transmission path into an electrical signal;
Detection means for detecting the reception level of the optical signal in the optical line termination device based on the electrical signal converted by the photoelectric conversion means;
Control means for causing the display means to display information corresponding to the reception level of the optical signal detected by the detection means,
The display means emits light,
The control means includes
Blinking the display means at a number of times corresponding to the reception level of the optical signal detected by the detection means;
When the control means causes the display means to blink a plurality of times, the last blinking is caused to blink in a different manner from the other blinks.
Optical line termination equipment.

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