JP2969684B2 - Switch circuit control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a line control system for an exchange.

2. Description of the Related Art A conventional line control method for an exchange will be described with reference to the drawings.

FIG. 2 is a configuration diagram of a system using a conventional line control system.

In FIG. 2, the conventional line control system has a control signal transmitting / receiving circuit inside the line accommodating circuit 50, and executes the transmission / reception processing of all control signals related to the line inside the line accommodating circuit 50.

Problems to be Solved by the Invention The conventional line control system is a system in which transmission / reception processing of all control signals related to the line is executed inside the line accommodating circuit 50. In the case where is accommodated, it is necessary to provide an additional circuit and a control program for the communication control in the line accommodation circuit 50.

For this reason, when the number of protocol types increases, it is necessary to prepare a line accommodating circuit suitable for the protocol processing corresponding to the protocol or a line accommodating circuit capable of supporting all protocols.

Therefore, there is a problem that the types of line accommodating circuits to be developed increase, and if the types are limited, the functions to be provided in the line accommodating circuits increase, and the cost of the line accommodating circuits increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and accordingly, an object of the present invention is to provide a new line control system for an exchange which can solve the above-mentioned problems inherent in the conventional technology. It is in.

Means for Solving the Problems To achieve the above object, a line control system according to the present invention includes a control signal relay circuit that relays a line control signal of an accommodated line to a communication path switch or a control switch. A line accommodating circuit, a control signal relay circuit of the line accommodating circuit, and a control for transmitting / receiving a line control signal via a speech path switch or a control switch to / from the control signal relay circuit of the line accommodating circuit; And a terminal control common trunk having a signal transmitting / receiving circuit.

Next, a preferred embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

Referring to FIG. 1, the exchange according to the present invention comprises a line accommodating circuit 10, a communication path switch 21, a control switch 22, a main controller 23, and a line control common trunk circuit 30. The line accommodating circuit 10 accommodates the line 01 and includes therein a multiplexing / demultiplexing circuit 11 and a control signal relay circuit 12. Also,
The line control common trunk circuit 30 includes a control signal transmission / reception circuit 31 therein, and is connected to the main controller 23 via an internal control bus 32.

 Next, the operation of this embodiment will be described.

The signal sent via the line 01 is sent to the line accommodation circuit 10
Multiplexing / demultiplexing circuit 11 inside the line accommodation circuit 10
Is divided into a control signal and a call signal.

The control signal is controlled by the control switch via the control signal relay circuit 12.
Sent to 22.

The control switch 22 between the control signal relay circuit 12 and the line control common trunk circuit 30 is connected in advance, and the line control common trunk circuit 30 receives a control signal via the control signal transmission / reception circuit 31 and receives the control signal. And a process corresponding to the line protocol, and sends a control request to the main controller 23 as needed to control the communication path switch 21 and the like.

In the present embodiment, the control switch 22 is provided to connect the signal path between the line accommodating circuit 10 and the line control common trunk circuit 30, but the communication path is connected using the communication path switch 21 without providing the control switch 22. Obviously, such a configuration is also possible. In that case, the control signal output from the control signal relay circuit 12 is supplied to the communication path switch 21, and further supplied from the communication path switch 21 to the control signal transmission / reception circuit 31 of the line control common trunk circuit 30.

Effect of the Invention As described above, according to the present invention, the transmission / reception processing of the control signal conventionally performed by the line accommodating circuit is performed by the line control common trunk circuit, so that the line requiring complicated protocol control is controlled. Can be provided in the line control common trunk circuit.

Further, even when the number of protocol types increases, a line control common trunk circuit suitable for the protocol processing can be prepared for a protocol, or a line control common trunk circuit capable of supporting all protocols can be prepared. The type of the accommodation circuit or the functions to be provided can be reduced, and the cost of the line accommodation circuit can be reduced.

Furthermore, even when a new protocol appears, it can be dealt with by adding a function to the line control common trunk circuit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional system. 01 ... line, 10 ... line accommodation circuit, 11 ... demultiplexing circuit, 12 ... control signal relay circuit, 21 ... speech path switch,
22 control switch, 23 main controller, 30 common line control trunk circuit, 31 control signal transmission / reception circuit, 32
... internal control bus, 40 ... line, 50 ... line accommodation circuit, 61
…… Speaker switch, 62 …… Main controller

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04Q 3/42-3/42 107 H04M 3/00 H04M 7/00-7/16

Claims (1)

(57) [Claims] 1. A multiplexing / demultiplexing circuit for separating a line control signal and a speech signal of an accommodated line, and a control for relaying the line control signal separated by the multiplexing / demultiplexing circuit to a speech path switch or a control switch. A line accommodating circuit including a signal relay circuit, the control signal relay circuit of the line accommodating circuit and the control signal relay circuit of the line accommodating circuit, wherein the line control signal is connected by the communication path switch or the control switch. A line control common trunk having a control signal transmitting / receiving circuit for transmitting / receiving via the communication path switch or the control switch and a function of transmitting a control request for controlling the control switch or the communication path switch via an internal control bus A circuit control method for an exchange, comprising a circuit.