JPS612466A - Subscriber's line exchange - Google Patents

Abstract

PURPOSE:To operate the exchange body side so as to be prevented from the difference of subscribers by forming a subscriber's circuit module corresponding to each subscriber in each subscriber's circuit and absorbing the difference of the subscriber by the subscriber's circuit module. CONSTITUTION:Subscriber's corresponding modules 13-0-13-2 corresponding to respective subscriber's functions are connected to uniform their output signals and prevent the exchange body from the differences corresponding to respective subscribers. When a subscriber is changed, the current module is replaced by a subscriber's corresponding module corresponding its function. When a direct storage format is applied as shown in this device, terminals of twice are required for the exchange side, but it is unnecessary to load the subscriber's corresponding modules on unused terminals and any problem is not generated economically. As shown in Fig. (b), dispersion control is attained by making the subscriber's corresponding part intelligent by the subscriber's corresponding module and the differences of the subscribers are absorbed by the subscriber's corresponding modules, so that the constitution of the exchange body can be simplified without providing the difference of the subscriber to the body.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a subscriber line exchange, and in particular to a digital subscriber line that can connect not only analog telephones but also digital telephones, digital terminal devices, etc. It concerns switching equipment.

[Prior art]

As shown in Figure 7, a conventional subscriber line switch has a main distribution frame (MDF) 2 installed between the subscriber cable and the switch 1 to support maintenance operations such as new subscriber installation and relocation. Therefore, in large-scale subscriber line exchanges, the scale of this main distribution board is extremely large, and maintenance is required to accommodate new installations, replacement of housing, removal, etc. The drawback was that the operational work was complicated.

By the way, the mainstream user interface in subscriber line exchanges is conventional analog telephones, but digital exchanges are increasingly being used to improve services. In this case, an A/D converter or a D/A converter is required to digitize the analog signal from the analog telephone, and vice versa. However, since such converters are somewhat expensive, it is currently necessary to multiplex the analog signals and digitize them before the digital exchange.

Moreover, in addition to digital telephones, digital exchanges also include
Digital terminal devices, etc. are being connected to diversify services.

By the way, with the further diversification of services due to the progress of digitalization, user interfaces have diversified to include physical interfaces.

[Problem that the invention seeks to solve]

Subscriber circuits in conventional digital exchanges are installed in modules for each of a plurality of subscriber lines, and a voice signal transmitting section and a dial signal receiving section are commonly installed in the main body of the exchange. The main distribution board has fixed interfaces for analog telephones, digital telephones, and digital terminal equipment (non-telephones), so when the number of subscribers to a particular service increases, etc. It is not possible to respond flexibly and easily to subscriber line interfaces and services. In order to be able to adequately deal with these problems, there is a problem in that the capacity of the main distribution board must be much larger than the number of subscribers of the subscriber line exchange.

[Means for solving problems]

In order to solve the above problems, the present invention has a processor for each subscriber line, installs subscriber modules corresponding to different subscriber line IJt interfaces, and uses the processor etc. to absorb the differences. The present invention provides a subscriber line exchange that employs a direct accommodation system for subscriber lines using a single-channel completely distributed control system that unifies the subscriber interface without showing differences in the subscriber exchange itself. As a means for this purpose, in a subscriber line exchange to which a plurality of different types of subscribers are connected, a subscriber line corresponding module is installed for each subscriber line, which corresponds to the subscriber line having a plurality of different types of interfaces. The subscriber line is installed in a form that accommodates the subscriber line directly in the exchange, and the subscriber line terminating circuit, subscriber line signal transmission/reception circuit, and information transfer with the common processing device of the exchange main body are carried out within the subscriber line compatible module. It is characterized in that it comprises a signal transmitting/receiving circuit and a signal processing control circuit for controlling each of the circuits, and that changes in subscriber numbers can be dealt with by changing the insertion/removal of the subscriber line corresponding module.

[Effect]

In the present invention, a subscriber line module corresponding to each subscriber is provided for each subscriber line, and this subscriber line module absorbs differences among subscribers, and the exchange main body can operate so as to eliminate these differences. If the subscriber changes, it can be handled without special wiring changes by inserting a subscriber line module suitable for the subscriber.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 6.

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of its analog telephone subscriber module, Fig. 3 is an explanatory diagram of its digital telephone subscriber module, and Fig. 4 is a main distribution board. FIG. 5 is an explanatory diagram of an information transfer sequence, and FIG. 6 is an explanatory diagram of a transfer information format.

In FIG. 1, 10 is an analog telephone, 11 is a digital telephone, 12 is digital home equipment (digital non-telephone), 13 is a subscriber support module, and 13-
0 is an analog telephone subscriber module, 13-1 is a digital telephone subscriber module, 13-2 is a digital home equipment subscriber module, 14-6 to 14-2 are test retractors such as test ammunition, 15- 0 to 15-2 are protectors such as fuses and overvoltage protectors, 16-θ to 16-2 are subscriber circuits, 17-O to 17-2 are microprocessors, 20 is a time division communication path section, and 21 is a center circuit. It is a control device.

The analog telephone subscriber module 13-o is placed between the subscriber and the exchange, and as shown in FIG.
Figure 2(b) shows C0DEC31 having a D conversion circuit and a D/A conversion circuit that converts digital signals into analog signals.
A tone sending circuit 33 that outputs dial tones and busy tones as digitally encoded signals, a push button signal receiving circuit 34 that receives push button signals, a control circuit 35 that is composed of a microprocessor, and a central control system. An inter-processor communication unit 36 for performing inter-processor communication with the device 21 is provided. And the above B
The OR3HT32 has the following components as shown in FIG.
5. It has a loop detection section 46 and the like, and a polarity reversal control section is provided if necessary. Therefore, a call from a subscriber via the subscriber line 30 is made by monitoring the monitoring signal output from the loop detection section 46, and the control circuit 3
This is done by sending out a dial tone from the tone sending section 33 under control from 5. In addition, analog-to-digital conversion of signals with the analog telephone 10 is performed using GODEC.
31. Further, a call to a subscriber is performed by the control circuit 35 controlling the call control unit 41 according to instructions from the central control unit 21 and sending out a ringing signal.

The digital telephone subscriber module 13-1 is placed between the subscriber and the exchange, and as shown in FIG.
A subscriber line interface that directly accommodates the subscriber line 50, provides a physical or logical interface with the subscriber line 50, transmits and receives subscriber line signals, and performs 2-wire H4 line conversion, etc. to provide an in-office interface. - Termination circuit (LIT) 51 and tone sending circuit 52 that outputs digitally encoded signals such as dial tone and busy tone
and a processor to be described later, which controls the transmission and reception of signals necessary for call connection, release, etc. to the digital telephone set, which is a subscriber terminal, and also controls communication with the digital telephone set for the subscriber line interface/termination circuit 51. The communication port 54 is connected to a control circuit 53 that controls information transfer with the central controller 21 and is composed of a microprocessor, and a communication port that exchanges information with the central controller 21 in controlling the exchange operation. An inter-processor port 54 is provided for mainly transferring dial information to the central control device 21, transmitting and receiving maintenance management information, and transferring incoming call activation signals from the central control device 21. Therefore, a call from a subscriber via the subscriber line 50 is made by monitoring the subscriber line interface/termination circuit 51 and by controlling the tone sending circuit 52 by the control circuit 53. The call to the central control unit 21
This is done by the control circuit 53 controlling the subscriber line interface/termination circuit 51 according to instructions from the subscriber line interface/termination circuit 51.

Furthermore, the digital home equipment subscriber module 13-2 has the same configuration as the digital telephone subscriber module and does not require the tone sending circuit 52, and the subscriber line termination circuit and the subscriber line signal transmission/reception circuit are BOR3H
T32, tone sending circuit 33, push button signal receiving circuit 34, etc. (not shown).

In the present invention, subscriber support modules 13-0, 13-1, -13-2 are connected to each subscriber according to the functions of the subscriber, and the output signals (or input signals from the exchange) are made uniform. ,The difference in subscriber support should not be visible on the main body of the exchange.Of course, when the subscriber changes, it is only necessary to replace it with a subscriber support module that corresponds to that function.

That is, in the conventional subscriber line exchange, as shown in FIG. 4(a), the subscriber line is connected to the subscriber circuit LC corresponding to that subscriber through an MDF connected to the subscriber line. For this reason, each time a subscriber changes a transfer service, etc., it is necessary to replace the wiring on the MDF, and the operation of an extended exchange facility has become extremely complicated.

In the present invention, as shown in FIG. 4(b), the subscriber support module is directly accommodated from the subscriber cable, and changes in the transfer service of the subscriber can be handled by inserting/removing and replacing the subscriber support module. However, in this case,
Generally speaking, an MDF terminal requires about twice the capacity of a switchboard due to differences in installation plans, etc.

On the other hand, if the direct accommodation mode according to the present invention is adopted,
Although twice as many terminals are required on the exchange side, there is no need to mount the subscriber support module on unused terminals, and there is no economic problem.In fact, in the present invention, the number of terminals shown in FIG. As shown in (b), distributed control is performed by making the subscriber handling section intelligent with the subscriber handling module, and this subscriber handling module absorbs the differences among subscribers, and the switch itself is equipped with subscriber handling functions. The main body configuration can be simplified without showing any differences.

Therefore, changes and transfers of services in diversifying interfaces can be easily handled by simply replacing, inserting and removing the subscriber support module.

By the way, the functions of the subscriber support module are: ■Termination of subscriber line, ■Support for protocol-compatible call processing procedures,
■Interruption of in-channel signals, ■Information transfer processing with the main body of the exchange, etc. Of these, ■ is mainly call monitoring/detection, sending a dial-ready signal, dial reception, disconnection monitoring/detection, sending a recovery signal, sending a calling signal, response monitoring/detection, etc. The information transfer sequence is shown.

The interface between the subscriber support module and the exchange can be implemented by sending and receiving simple information based on the format shown in FIG.

〔Effect of the invention〕

In the present invention, a subscriber module having a processor is installed for each subscriber line, and the exchange side interface is unified among various subscriber modules. When directly accommodating subscriber lines, it is possible to easily deal with new installation, replacement, removal, etc. of subscribers by inserting and removing the subscriber support module corresponding to the subscriber.

As described above, according to the present invention, a subscriber line exchange equipped with a subscriber support module using a single-channel completely distributed control method that supports subscriber lines in the direct accommodation mode can perform maintenance such as new subscriber installation and relocation. Operation is simplified and future service measures can be handled flexibly.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of a subscriber module for analog telephones, Fig. 3 is an explanatory diagram of a subscriber module for digital telephones, and Fig. 4 is an illustration of the main distribution board function. 5 is an explanatory diagram of an information transfer sequence, FIG. 6 is an explanatory diagram of a transfer information formant, and FIG. 7 is a schematic diagram of a conventional subscriber line exchange. In the figure, 10 is an analog telephone, 11 is a digital telephone, 2 is a digital home device (digital non-telephone),
13 is a subscriber support module, 13-0 is an analog telephone subscriber module, 13-1 is a digital telephone subscriber module, 13-2 is a digital home equipment subscriber module, and 14-O to 14-2 are subscriber modules. 15-0 to 15-2 are fuses and protectors such as overvoltage protectors, 16-o to 16-2 are subscriber circuits, 17-O to 17-2 are microprocessors, Reference numeral 20 represents a time division communication path section, and reference numeral 21 represents a central control unit.

Claims (1)

[Claims] In a subscriber line exchange to which multiple different types of subscribers are connected, a subscriber line compatible module corresponding to the subscriber line with multiple types of different interfaces is installed for each subscriber line directly to the exchange. A subscriber line terminating circuit, a subscriber line signal transmitting/receiving circuit, a signal transmitting/receiving circuit for transmitting information with the common processing device of the exchange main body, and each of the above-mentioned circuits are installed in the subscriber line compatible module in a form that accommodates the subscriber line. A subscriber line exchange, comprising a signal processing control circuit that performs control, and is capable of responding to changes in subscriber numbers by changing the insertion and removal of the subscriber line compatible module.