JP3496368B2 - Line terminal equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line terminal device for transferring data between a data terminal device and a central monitoring device or home controller by a no-ringing communication service utilizing an existing analog public line network.

[0002]

2. Description of the Related Art As shown in FIG. 4, a line terminal device 1 of this type conventionally is a device for connecting a data terminal device 2 to a public line 3. Here, the data terminal device 2 is an automatic gas shutoff device (commonly known as a microcomputer meter) with a built-in microcomputer, which has become popular recently, and is connected to a gas meter to measure the gas flow rate and shut off the gas supply when an abnormality is detected. In addition, the line reading 1
It is a device that communicates with the central monitoring device 4 via the.

Then, the line terminal device 1 of this type first detects a polarity reversal by the line control unit 5 and becomes a semi-closed state.
The RS ringing signal is monitored and the no ringing communication is started.
When the signal control unit 6 receives the NRS signal within a fixed time after the polarity reversal, the central control unit 7 collates with the NRS call data stored in the NRS call type storage unit 8 and, if they match, A
A general communication protocol is to respond to an NS signal and start receiving a message.

After that, the central monitoring device 4 transmits a meter reading request telegram to which the ID is added to the line terminal device 1. When the ID data set in the ID storage unit 9 of the line terminal device 1 match, communication with the data terminal device 2 is started via the transmission / reception interface unit 10. Then, during the no-ringing communication, the line terminal device 1
The off-hook of the telephone 11 connected to the public line 3 is monitored inside, and the communication is interrupted when the telephone 11 is off-hook.

Further, when communicating with a plurality of data terminal devices and one public line 3, the line terminal device to which the data terminal device is connected as shown in FIG. 5 is the line terminal to which the data terminal device is connected. NRS different from the device
Call type is set (line terminal device NRS call type =
1, the NRS call type of the line terminal device = 2) and the connection is established. By selecting the NRS call type from the central monitoring device 4, it was possible to select and communicate with the target line terminal device and data terminal device.

[0006]

However, in the above configuration, when a plurality of data terminal devices are monitored by one public line, the same number of line terminal devices as data terminal devices must be prepared. There were challenges.

On the other hand, as a method of monitoring a plurality of data terminal devices with one line terminal device, the line terminal device is provided with a transmission / reception interface unit for connecting to each data terminal device, and the data terminal device is selected by a telegram. There is also a method of making a new line terminal device by changing the communication protocol such as that, but it is difficult to mix and use the existing line terminal device because it is necessary to change the communication protocol of the central monitoring device and the line terminal device. There is also a problem that management of the monitoring device becomes complicated.

[0008]

In line terminal device of the present invention, in order to solve the problems] corresponds to another plurality of transmitting and receiving interface unit
The same number of NRS call classification data are stored in the multiple NRS call classification storage unit, and the NRS call signal received by the signal control unit when no ringing is received is compared with the NRS call classification data in the multiple NRS call classification storage unit. If they match, a central control unit for starting communication with a data terminal device communicatively connected to the corresponding transmission / reception interface unit,
The same NRS call type data in the S call type storage unit
When set to a value, no ringing is received when an incoming call is received.
The stored NRS call type data is stored in the multiple NRS call type data.
And a transmission / reception interface selection unit for controlling the central control unit so as to communicate with a predetermined transmission / reception interface unit and a data terminal device connected in communication when the NRS call type data stored in the unit is matched. It is a thing.

According to the present invention, by connecting a plurality of data terminal devices by communication with one line terminal device without changing the existing NRS call type management method of the central monitoring device, one data terminal It is possible to reduce the cost of the line terminal device with respect to the device and to connect one data terminal device to one line terminal device, which is the same as the conventional one.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The line terminal device of the present invention is placed between a plurality of data terminal devices and a public line, and has a line control unit for matching electrical conditions so as to perform no ringing communication via the public line. Supports a signal control unit that sends and receives signals to and from the public line, multiple transmission / reception interface units that communicate with the data terminal device, and transmission / reception interface units
To a double NRS call type storage unit which stores a plurality of NRS call type data by the same number, NRS call signal stored in NRS call signal and a double NRS call type storage unit received by the signal control unit during non-ringing call A central control unit that starts communication with a data terminal device that is communicatively connected to a corresponding transmission / reception interface unit if there is a match with the data, and a plurality of NRS call type storage units
When the NRS call type data of is set to the same value,
NRS call type data received when no ringing is received
NRS stored in the multiple NRS call type storage unit
A transmission / reception interface selection unit for controlling the central control unit so as to communicate with a predetermined transmission / reception interface unit and a data terminal device communicatively connected when the data matches the call type data .

Further, each N of the multiple NRS call type storages
This is provided with a multiple ID storage section for storing a plurality of ID data for collation corresponding to the RS call type data.

Furthermore, it is stored in the multiple ID storage unit.
When the ID data is set to the same value, the ID data received during the no ringing communication is stored in the multiple ID storage unit.
A transmission / reception interface second selection unit that controls the central control unit so as to communicate with a data terminal device that is communicatively connected to a predetermined transmission / reception interface unit when it matches the stored ID data. is there.

According to the first aspect of the present invention, the line control unit matches the electrical conditions when a no-ringing call is received, and the signal control unit receives the NRS signal. When the NRS call signal data stored in the multiple NRS call type storage unit and the received NRS signal match, the signal control unit responds with an ANS signal, and then communicates with the corresponding data terminal device via the transmission / reception interface unit. The central controller controls communication. In this case, when the same data to the NRS call signal data stored in the multi-NRS call type storage unit is set, transceiver interface selection unit selects the reception interface unit predetermined Upon receipt of the data at the time of non-ringing call Communication with the corresponding data terminal device is started.

In the second configuration, when the communication telegram to which the ID is added is received by the signal control unit, it is collated with the ID data stored in the multiple ID storage unit corresponding to the NRS call type data received at the time of no ringing incoming call. If so, the no ringing communication will be continued.

[0015] If the same data is set to the ID data stored in the multi-ID storage unit by the third arrangement,
When the transmission / reception interface second selection unit receives a message with the ID data during no ringing communication, the transmission / reception interface second selection unit selects a predetermined transmission / reception interface unit and starts communication with the corresponding data terminal device.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block configuration diagram of a line terminal device of the present invention. The same reference numerals as those in FIG. 4 are components having the same functions.

Reference numeral 12 is a second transmission / reception interface section.
It is connected to the second data terminal device 13. Reference numeral 14 is a multiple NRS call type storage unit, and data settings can be changed by communication.
A plurality of call type data can be stored.

Reference numeral 15 denotes a multi-ID storage unit whose data settings can be changed by communication, and a 14-digit collation ID corresponding to each NRS call type data of the multi-NRS call type storage unit 14 is provided.
It is possible to store a plurality of data.

Reference numeral 16 denotes a transmission / reception interface selection unit, and when the same data is set in the data stored in the multiple NRS call type storage unit 14, when the data is received at the time of no ringing incoming, the transmission / reception interface unit 10 determined in advance The central controller 7 is controlled so as to communicate with the connected data terminal device 2.

When the same data is set in the data stored in the composite ID storage unit 15 at the transmission / reception interface second selection unit 17, when the data is received when there is no ringing incoming call, the predetermined transmission / reception interface unit 10 receives the data. The central controller 7 is controlled so as to communicate with the connected data terminal device 2.

The operation when the two data terminal devices 2 and 13 are connected in the above configuration will be described.

Here, the transmission / reception interface 10 corresponding to the data terminal device 2 has the NRS call type "1",
The collation ID data is "all 1", and the transmission / reception interface 12 corresponding to the data terminal device 12 has N.
The RS call type is set to “2” and the collation ID data is set to “2” so that the multiple NRS call type storage unit 14 and the duplicate I data are stored.
It is assumed that the D storage unit 15 is set.

In the central monitoring device 4, the communication is started so that the NRS call type is 1 and the collation ID data is all 1 to communicate with the data terminal device 2. The line terminal device 19 to which the present invention is applied first detects a polarity reversal by the line control unit 5, becomes a semi-closed state, monitors the NRS ringing signal, and enters no ringing communication.

When the signal control unit 6 receives the "1" of the NRS signal within a fixed time after the polarity reversal, the central control unit 18 outputs the multiple N signals.
Since it matches the NRS call data “1” set in the RS call storage unit 14, the electronic message receiving mode is entered so that communication can be performed by responding to the ANS signal.

Then, when the central monitoring device 4 sends a meter-reading request telegram to which the "all 1" ID is added to the line terminal device 19, it corresponds to the received NRS call type data "1". Since the matching ID data “all 1” in the duplicate ID storage unit 15 match, the activation message is transmitted to the data terminal device 2 via the transmission / reception interface unit 10.

In the central monitoring unit 4, the data terminal unit 1
NRS call type is “2” to communicate with No. 3, I for verification
D data starts communication so as to be called with "all 2". Similarly, when the line terminal device 17 receives "2" of the NRS signal, the central control unit 18 matches the "2" of the NRS call data set in the multiple NRS call storage unit 14, and therefore responds to the ANS signal to communicate. Enter the message reception mode so that you can.

Then, when the central monitoring device 4 sends to the line terminal device 21 a meter-reading request telegram to which the "all 2" ID is added, it corresponds to the received NRS call type data "2". Since the matching ID data “all 2” in the duplicate ID storage unit 15 match, the activation message is transmitted to the data terminal device 13 via the second transmission / reception interface unit 12.

Therefore, when a plurality of data terminal devices are monitored by one line terminal device, the central monitoring device according to the present invention uses one NRS call type and one corresponding ID for each data terminal device. Existing ID of
There is no need to change the management method.

Next, the operation of the two line terminal devices 20 and 21 to which the present invention is applied when one line terminal device is connected to one data terminal device will be described with reference to FIG. The NRS call type corresponding to the transmission / reception interface unit 10 to which the data terminal device 2 is connected to the line terminal device 20 is “1”, the verification ID data is “all 1”, and the unused second transmission / reception interface unit 12 N corresponding to
The multiple NRS call type storage unit 14 and the multiple ID storage unit 15 are set so that the RS call type is “1”.

On the other hand, the data terminal unit 13 is connected to the line terminal unit 21 connected on the same line as the line terminal unit 20.
The NRS call type corresponding to the transmission / reception interface unit 10 connected to is “2”, the collation ID data is “all 2”, and the unused transmission / reception interface unit 12
Multiple NRs so that the NRS call type corresponding to
The S call type storage unit 14 and the multiple ID storage unit 15 are set.

In the central monitoring device 4, the communication is started so that the NRS call type is 1 for communicating with the data terminal device 2 and the collation ID data is all 1. The line terminal device 20 first detects the polarity reversal and becomes a semi-closed state, and NR
The S ringing signal is monitored and the no ringing communication is started.

When "1" of the NRS signal is received within a fixed time after the polarity inversion, the transmission / reception interface selection unit 16
Since the data stored in the multiple NRS call type storage unit 14 is the same data, the central control unit 18 is controlled to respond to the ANS signal in order to communicate with the data terminal device 2 connected to the transmission / reception interface unit 10. In order to communicate with the data terminal device 2, the electronic message receiving mode is entered.

Further, in order to communicate with another data terminal device 13, the central monitoring device 4 starts communication so that the NRS call type is 2, and the collation ID data is all 2. Line terminal device 2 connected on the same line
0 indicates no response even if the NRS signal “2” is received. Upon receiving the NRS signal “2”, the line terminal device 21 responds to the ANS signal and enters the telegram receiving mode so that it can communicate with the data terminal device 13 connected to the transmission / reception interface unit 10.

According to this configuration, when the device to which the present invention is applied connects one line terminal device to one data terminal device, one line terminal device occupies two or more types of NRS call types. Since there is no need to do so, it is also possible to use one data terminal device for communication connection to one line terminal device as in the prior art without changing the existing NRS call type management method of the central monitoring device.

Further, since it is possible to connect a plurality of data terminal devices with one line terminal device, there is no need to change the management method of the NRS call type in the central monitoring device, and one data terminal device can be used. On the other hand, it is possible to provide a low-cost line terminal device.

Another embodiment will be described with reference to FIG. 3. Since the line terminal device 22 can store the same number of ID data in the multiple ID storage unit 15 for each data terminal device connected, after no ringing is received. A corresponding data terminal device can be selected by a message with an ID, and the central monitoring device 4 that manages the data terminal device by the ID can also perform the same ID management as in the conventional art. Mixed use of equipment and conventional models is possible without changing the management of the central monitoring equipment.

Next, another operation example in the case of connecting one line terminal device to one data terminal device will be described with reference to FIG.

The line terminal device 22 corresponds to the transmission / reception interface unit 10 to which the data terminal device 2 is connected.
The RS call type is "1", the matching ID data is "all 1", and the matching ID data corresponding to the unused second transmission / reception interface unit 12 is "all 1" Unit 14 and duplicate ID storage unit 15
Is set.

The central monitoring unit 4 starts communication so that the NRS call type is 1 and the collation ID data is all 1 to communicate with the data terminal unit 2. The line terminal device 22 first detects the polarity reversal and becomes a semi-closed state, and NR
The S ringing signal is monitored and the no ringing communication is started.

No ringing ID within a fixed time after the incoming call
When the meter reading request message of "all 1" is received, the data stored in the multiple ID storage unit 14 in the transmission / reception interface second selection unit 17 is the same data.
The transmission / reception interface unit 10 is selected in order to communicate with.

Therefore, when the present apparatus is used in the form in which only one data terminal device is connected, if the data stored in the multiple ID storage unit 15 is set to the same data, the transmission / reception interface second selection unit transmits / receives data on a predetermined side. Since the line terminal device does not occupy an unnecessary ID because the interface is selected and the communication is not performed, it is not necessary to manage the unused IDs, so it can be used only as a line terminal device for connecting multiple data terminals (multiport). Instead, it can also be used as a line terminal device for connecting a single data terminal device (single port).

[0042]

As described above, according to the line terminal device of the present invention, the following effects can be obtained.

(1) Since it is possible to connect a plurality of data terminal devices to one line terminal device without changing the NRS call type of the central monitoring device, one data terminal device is connected to one line terminal device. Compared with the case of connecting, the line control unit such as the line control unit and the signal control unit, the power supply unit and the case can be shared, and the wiring work between the line terminal devices can be omitted, so that the line terminal device can be manufactured at low cost. Can be used.

Further, when this device is used in a form in which only one data terminal device is connected, if a plurality of NRS call signal data stored in the multiple NRS call type storage unit is set to the same data, it is set at the time of NR incoming call. When the NRS call type is received, the transmission / reception interface selection unit selects the transmission / reception interface on the predetermined side for communication, so that the line terminal device does not occupy the unnecessary NRS call type. Therefore, there is no need to manage unused NRS call type signals, and the system can be used not only as a multiple data terminal connection (multiport) line terminal device but also as a single data terminal device connection (single port) line terminal device.

(2) Since the same number of NRS call type data and IDs corresponding thereto can be stored for each connected data terminal device, the central monitoring device (center) can store one line terminal device. Virtual management can be performed in the same way as one data terminal device is connected to each line terminal device instead of being connected to multiple data terminal devices. It can be used mixed with conventional models without changing the management method.

Further, since the same number of ID data can be stored for each data terminal device to be connected, the corresponding data terminal device can be selected by the message with the ID after no ringing is received. Since the same ID management as that of the conventional one can be performed even in the central monitoring device that is being managed, mixed use of this device connected to a plurality of data terminal devices and a conventional model is possible without changing the management of the central monitoring device.

(3) When the present device is used in a form in which only one data terminal device is connected, if a plurality of ID data stored in the multiple ID storage unit is set to the same data, the transmission / reception interface second selection unit is predetermined. Since the line terminal device does not occupy a useless ID because the transmission / reception interface on the other side is selected for communication, it is not necessary to manage an unused ID, and a line terminal device for connecting multiple data terminals (multiport) It can be used not only as a line terminal device for connecting a single data terminal device (single port).

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a line terminal device according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a line terminal device when two units are connected in the embodiment of the present invention.

FIG. 3 is a block configuration diagram of a line terminal device according to another embodiment of the present invention.

FIG. 4 is a block configuration diagram of a conventional line terminal device.

FIG. 5 is a block configuration diagram of a conventional line terminal device when two units are connected.

[Explanation of symbols]

5 line control unit 6 Signal control section 10 Transmission / reception interface section 12 Second transmission / reception interface unit 14 Multiple NRS call type storage unit 15 Multiple ID storage 16 Transmission / reception interface selection section 17 Transmission / Reception Interface Second Selection Section 18 Central control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-217031 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04Q 9/00

Claims (3)

(57) [Claims] 1. A line control unit which is placed between a plurality of data terminal devices and a public line, and which adjusts electrical conditions so as to perform no ringing communication via the public line, and a signal to the public line. A signal control unit for transmitting and receiving, a plurality of transmitting and receiving interface units for communicating with the data terminal device,
A multiple NRS call type storage unit that stores the same number of NRS call type data corresponding to each transmission / reception interface unit, an NRS call signal received by the signal control unit when no ringing is received, and the multiple NRS call type storage unit Stored in the multiple NRS call type storage unit; and a central control unit that starts communication with a data terminal device that is communicatively connected to the corresponding transmission / reception interface unit if it matches with the NRS call type data stored in Doing multiple
NRS call type data received when no ringing is received when NRS call type data is set to the same value
Is an NRS call stored in the multiple NRS call type storage unit.
A line terminal device comprising: a transmission / reception interface selection unit that controls the central control unit so as to communicate with a data terminal device that is communicatively connected to a predetermined transmission / reception interface unit when the type classification data matches . 2. Each NRS of the multiple NRS call type storage section
2. The line terminal device according to claim 1, wherein the line terminal device comprises a multiple ID storage section for storing a plurality of verification ID data corresponding to call type data. 3. ID data stored in the duplicate ID storage section
Is set to the same value, during no ringing communication
The received ID data is stored in the multiple ID storage unit.
That if there is a match with the ID data, according to claim 2 which is composed of a transceiver interface second selection unit for controlling the central control unit to the communication with the data terminal equipment communicatively connected with a predetermined transceiver interface unit The described line terminal device.