JP3592121B2 - A switching device that identifies only analog terminals and reports errors when an error occurs - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is used in a communication network in which a plurality of terminals having different line usage types coexist. In particular, the present invention relates to a technique for processing a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line by one switching device.
[0002]
[Prior art]
In recent years, when personal computers have become widespread, personal computers have been used as telephone terminals together with telephones. With the spread of such personal computer communication, digital communication networks such as ISDN have also spread.
[0003]
In such a digital communication network, a user can use an analog terminal such as a telephone or a digital terminal such as a personal computer. Taking ISDN as an example, an analog terminal and a digital terminal can be connected to each of the B1 and B2 channels and used.
[0004]
In addition, a switching device arranged in a digital communication network needs to mix both a line to which an analog terminal is connected and a line to which a digital terminal is connected. In addition, it is necessary to mix dedicated lines.
[0005]
FIG. 5 shows an example of an exchange device in which three types of lines, namely, a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line are mixed in one exchange device. The switching device shown in FIG. 5 has an interface with a higher-order device of the switching device in an SDH (Synchronous Digital Hierarchy) 20. In a normal state, the B channel and the D channel from the SDH 20 are transmitted through the time division communication path switch 13, The maintenance and control information of the user terminal is sent to the user terminal via the format converter 12 which terminates the information. An SD (Signal Distributor) / CO (Control) unit 14 sends control information of analog terminals / digital terminals.
[0006]
When the line or the system is abnormal, a message notifying the abnormality is transmitted from the talk sound source 15. At this time, the SD pattern is sent from the SD pattern sequence circuit 16 as control information of the analog terminal. FIG. 6 is a diagram showing an example of the SD pattern. FIG. 7 shows an SD pattern sequence.
[0007]
When the button switch 21 is pressed or an abnormality is notified to the SD pattern sequence circuit 16 by an instruction from a higher-level device, the SD pattern sequence circuit 16 displays the SD pattern shown in FIG. Data is transmitted in accordance with such an SD pattern sequence. That is, when the occurrence of abnormality is notified, an SD pattern (off pattern) in which “0” is inserted into all SD bits is output as an off pattern for 6 seconds. As a result, the line to which the analog terminal is connected is reset. Subsequently, an SD pattern (normal pattern) in which “1” is inserted into SD10, SD12, SD13, and SD26 is output. As a result, the line is connected to the talker sound source 15. When the notification of the occurrence of the abnormality is released, the SD pattern (off pattern) in which “0” is inserted into all the SD bits is output again for one second, and then the process returns to the normal processing.
[0008]
[Problems to be solved by the invention]
As described above, when an abnormality occurs, a message from the talk sound source 15 is sent to the analog terminal after the SD patterns shown in FIGS. 6 and 7 are output.
[0009]
At this time, in a switching device in which the line to which the analog terminal is connected, the line to which the digital terminal is connected, and the dedicated line are mixed, the line to which the digital terminal is connected and the line to which the analog terminal is connected are also used. Similarly, after the SD patterns shown in FIGS. 6 and 7 are output, a message from the talker sound source 15 is sent.
[0010]
However, the message from the talker sound source 15 is valid only for analog terminals, and is invalid for digital terminals and dedicated lines. In particular, the continuity must always be guaranteed for the dedicated line, but by outputting the SD pattern as shown in FIGS. 6 and 7, the line is reset and the continuity is guaranteed. It becomes difficult to do.
[0011]
Therefore, in a switching device that mixes a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line, the line to which the analog terminal is connected is selected while ensuring the continuity of the dedicated line. Is required to be able to connect the talker sound source 15.
[0012]
The present invention has been made in such a background, and when an abnormality occurs, the analog terminal can select a line to which the analog terminal is connected and send a voice message. It is an object of the present invention to provide a switching device that performs notification. SUMMARY OF THE INVENTION It is an object of the present invention to provide a switching device that identifies only an analog terminal and notifies an abnormality when an abnormality occurs that does not affect a dedicated line even when an abnormality occurs in a general line.
[0013]
[Means for Solving the Problems]
According to the present invention, when various use types of a line are mixed, the use type is stored corresponding to the line, and when an abnormality occurs, the user of the terminal is notified that an abnormality has occurred in a form suitable for the use type. Is notified.
[0014]
That is, the present invention includes means for mixing a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line, and sending a voice message notifying the occurrence of an abnormality to the terminal when an abnormality occurs. This is a switching device that identifies only analog terminals when an abnormality occurs and notifies an abnormality.
[0015]
Here, a feature of the present invention is that a means for storing use type information of the line is provided, and the voice message is selectively transmitted to a line to which the analog terminal is connected with reference to the storage means. Including means for connecting means for performing the operations.
[0016]
Thus, it is possible to prevent the transmission of the voice message from adversely affecting the communication between the user of the digital terminal and the user of the leased line.
[0017]
It is preferable that a means for storing the type of use of the line and updating the type of use information from upper software be provided.
[0018]
Accordingly, it is possible to cope with the case where the user changes the analog terminal to the digital terminal or the digital terminal to the analog terminal.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of a main part of a switching device for identifying only an analog terminal when an abnormality occurs and notifying an abnormality according to the embodiment of the present invention. FIG. 2 is a diagram showing an A / I identification memory.
[0020]
In the embodiment of the present invention, as shown in FIG. 1, a line to which the analog terminal 10-1 is connected, a line to which the digital terminal 10-2 is connected, and a dedicated line are mixed. This is an exchange device that identifies only an analog terminal when an abnormality occurs and includes an SD pattern sequence circuit 16 and a talker sound source 15 that are means for transmitting a voice message notifying the occurrence, and notifies the abnormality.
[0021]
Here, a feature of the present invention is that an A / I identification memory 18 is provided as means for storing the type of use information of the line, and the analog terminal 10-1 is referred to by referring to the A / I identification memory 18. It is provided with a format converter 12 which is a means for selectively connecting the talk sound source 15 to the connected line. The A / I identification memory 18 is backed up by a battery 19.
[0022]
In the embodiment of the present invention, a memory control unit 17 is provided as means for storing the use type of the line and updating the use type information of the A / I identification memory 18 in accordance with an instruction from a host software.
[0023]
【Example】
The switching device of the embodiment of the present invention is as shown in FIG. 1, and the basic operation is the same as that of the conventional switching device shown in FIG. That is, the SDH 20 has an interface with a higher-level device, and in a normal state, the B channel and the D channel from the SDH 20 pass through the time-division communication path switch 13 and terminate the user terminal maintenance and control information. 12 to the user terminal. The SD / CO unit 14 sends out control information of analog terminals / digital terminals.
[0024]
When the line or the system is abnormal, a message notifying the abnormality is transmitted from the talk sound source 15. At this time, the SD pattern is sent from the SD pattern sequence circuit 16 as control information of the analog terminal. FIG. 6 is a diagram showing an example of the SD pattern. FIG. 7 shows an SD pattern sequence.
[0025]
When the button switch 21 is pressed or an abnormality is notified to the SD pattern sequence circuit 16 by an instruction from a higher-level device, the SD pattern sequence circuit 16 displays the SD pattern shown in FIG. Data is transmitted in accordance with such an SD pattern sequence. That is, when the occurrence of abnormality is notified, an SD pattern (off pattern) in which “0” is inserted into all SD bits is output as an off pattern for 6 seconds. As a result, the line to which the analog terminal is connected is reset. Subsequently, an SD pattern (normal pattern) in which “1” is inserted into SD10, SD12, SD13, and SD26 is output. As a result, the line is connected to the talker sound source 15. When the notification of the occurrence of the abnormality is released, the SD pattern (off pattern) in which “0” is inserted into all the SD bits is output again for one second, and then the process returns to the normal processing.
[0026]
Comparing the exchange apparatus of the embodiment of the present invention shown in FIG. 1 with the exchange apparatus of the conventional example shown in FIG. 5, it has an A / I identification memory 18, a memory control unit 17 and a battery 19. As shown in FIG. 2, the A / I identification memory 18 stores a line number and a use type in association with each other. FIG. 3 is a flowchart showing the abnormality notification operation of the format conversion unit 12. In the first embodiment of the present invention, as shown in FIG. 3, when the format conversion unit 12 receives the notification of the occurrence of the abnormality by pressing the button switch 21 or by the host device (S1), the format conversion unit 12 refers to the A / I identification memory 18 (S1). S2). As a result, if the line is not connected to the analog terminal (S3), the information from the time division communication path switch 13 is sent directly to the terminal (S4). If the line is connected to an analog terminal (S3), the talker sound source 15 is inserted into the B channel (S5). Subsequently, the SD pattern from the SD pattern sequence circuit 16 is inserted into the control channel (D channel) (S6). Thereby, the system downtalk can be transmitted only to the analog terminal (S7).
[0027]
FIG. 4 is a flowchart showing an operation of updating the A / I identification memory 18 of the memory control unit 17. The memory control unit 17 monitors the line corresponding unit 11 to monitor the line use type (S11). As a result, if there is a change in the line usage type (S12), the A / I identification memory 18 is updated (S13).
[0028]
In addition, since the dedicated line is irrelevant even when an abnormality occurs, continuity can be always guaranteed by ignoring this and performing the processing.
[0029]
【The invention's effect】
As described above, according to the present invention, when an abnormality occurs, a line to which an analog terminal is connected can be selected and a voice message can be transmitted. Further, even when an abnormality related to the analog line occurs, the dedicated line is not affected.
[Brief description of the drawings]
FIG. 1 is a block diagram of a main part of an exchange device according to an embodiment of the present invention.
FIG. 2 is a diagram showing an A / I identification memory.
FIG. 3 is a flowchart showing an abnormality notification operation of the format conversion unit.
FIG. 4 is a flowchart showing an operation of updating the A / I identification memory of the memory control unit.
FIG. 5 is a diagram showing an example of a switching device in which three types of lines, namely, a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line are mixed.
FIG. 6 is a diagram showing an example of an SD pattern.
FIG. 7 is a diagram showing an SD pattern sequence.
[Explanation of symbols]
10-1 Analog Terminal 10-2 Digital Terminal 10-p Terminal 11 Line Correspondence Unit 12 Format Conversion Unit 13 Time-Division Communication Path Switch 14 SD / CO Unit 15 Talking Sound Source 16 SD Pattern Sequence Circuit 17 Memory Control Unit 18 A / I Identification Memory 19 Battery 20 SDH
21 Button switch

Claims (2)

A circuit arranged in a digital communication network, wherein a line to which an analog terminal is connected, a line to which a digital terminal is connected, and a dedicated line are mixed, and when an abnormality occurs, means for transmitting a voice message notifying the terminal of the abnormality is provided. In the exchange device that identifies only the analog terminal when an abnormality occurs and notifies the abnormality,
Means for storing the type-of-use information of the line, and when the occurrence of the abnormality is notified, an SD pattern in which 0 is inserted into all SD bits as an analog terminal control channel signal is transmitted for a predetermined time with reference to the means for storing. After resetting the line to which the analog terminal is connected, a normal SD pattern is transmitted as a control signal of the line to which the analog terminal is connected, and a voice message notifying the abnormality to the line to which the analog terminal is connected is transmitted. Means for outputting an SD pattern in which 0 is inserted into all SD bits when the notification of the occurrence of the abnormality is released, and returning to normal processing . Exchange apparatus according to claim 1 Symbol mounting comprising means for updating the usage type information from the higher software stores usage type of the line.

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