JPS6229958B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a register that is a selection signal receiving circuit in an automatic telephone exchange, and more particularly to a register of an automatic telephone exchange that can be used both as a calling register and a receiving register.

Conventionally, in automatic telephone exchanges employing a common control system, such as crossbar type telephone exchanges and electronic telephone exchanges, selection signals such as dial pulses and multifrequency signals are received by a common circuit called a register. Generally, a register for receiving a selection signal transmitted from an extension subscriber is a transmitting register,
A register for receiving a selection signal sent from another station through an incoming trunk is called an incoming register, and conventionally, the outgoing register and incoming register were constructed from separate circuits. That is, referring to FIG. 1, 101 is an extension subscriber, 102 is a subscriber circuit, 103 is a main channel switch network, 104 is an originating register, 105 is an incoming trunk, and 106 is an incoming trunk. indicates the incoming register link, 107 indicates the incoming register,
When the extension subscriber 101 raises the handset to make a call, the subscriber circuit 102 detects this and activates the common control unit (not shown) to call the empty call register 10.
4, and transmit register 104 and subscriber circuit 1.
02 by connecting path 1, and transmitting register 1
04 sends a dial tone to the subscriber 101, and the subscriber 101 operates the dial on the telephone to send a selection signal to the calling register 104. On the other hand, when there is an incoming call on the incoming trunk 105, the incoming trunk 105 detects this, activates a common control unit (not shown), selects an empty incoming call register 107, and sends the incoming call to the incoming trunk via the incoming call register link 106. 105 and the incoming call register 107 are connected. Thereafter, the selection signal sent from another station is transferred from the incoming trunk 105 to the incoming register link 106 forming connection path 2.
The received call register 107 receives the received call. Therefore, in the conventional example shown in FIG. 1, it is necessary to provide separate calling registers and receiving registers, which is not economical, especially in small-capacity exchanges, because the number of registers increases.

For this reason, some systems accommodated incoming trunks (incoming trunks) in both the trunk-side terminal and the line-side terminal of the main channel switch network, and used registers for both outgoing and incoming calls. Figure 2 shows a conventional example where the register is used for both originating and receiving calls, where 201 is the incoming trunk and 202 is the incoming trunk.
203 is a departure/arrival register, 203 is a trunk interface circuit, and other symbols are the same as in FIG. In FIG. 2, when an extension subscriber 101 makes a call, the subscriber circuit 102 detects this and activates a common control circuit (not shown),
The subscriber circuit 102 and the call register 202 are connected through the main path switch network 103. On the other hand, if a call is received from another station through the incoming trunk 201, the incoming trunk 201
01 detects this, and through the line side accommodation circuit 3 of the incoming trunk 201, the trunk interface circuit 2 exclusively assigned to the incoming trunk 201
03, the activated trunk interface circuit 203 further activates a common control circuit (not shown), selects an empty call register 202, and connects the connection path 4 of the main communication path switch network 103. The trunk interface circuit 203 dedicated to the incoming trunk 201 and the outgoing/incoming call register 202 are connected through the incoming call trunk 201 . The conventional example shown in Fig. 2 is superior in that the number of registers can be reduced compared to Fig. 1, but it requires one trunk interface circuit for each incoming trunk circuit and one line side Since the terminals were occupied, there was still a problem with the overall economic efficiency.

The purpose of this invention is to reduce the number of line-side terminals occupied in the main channel switch network.
When the register is housed in both the line side terminal and trunk side terminal of the main channel switch network and used as an outgoing register, the trunk side terminal is used, and when it is used as an incoming call register, the line side terminal is used. The purpose of the present invention is to provide a register for an automatic telephone exchange that is highly economical and has both functions.

That is, according to the present invention, the subscriber circuit and the calling/calling circuit are connected to the line side terminal of the main channel switch network.
An automatic telephone exchange configured to accommodate a register interface circuit connected to a register for both incoming and outgoing calls, and also to accommodate each of the incoming and outgoing trunk terminals on the trunk side and the register for both outgoing and incoming calls. When the register detects a call from an extension subscriber, the subscriber circuit housed in the line side terminal is connected to the trunk side terminal of the register for both calling and receiving calls via the main communication path switch network. When there is an incoming call on the incoming trunk, that is, the incoming trunk, the incoming trunk and the line side terminal of the register interface circuit connected to this register for both outgoing and incoming calls are connected via the main channel switch network, and in each case It is possible to provide a register of an automatic telephone exchange for both originating and terminating calls, which is capable of receiving a selection signal for a call. Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 shows an embodiment of the present invention, in which 301 indicates an incoming trunk (incoming trunk);
02 is a register for outgoing and incoming calls, 303 is a register interface circuit, and other symbols are the same as those in FIGS. 1 and 2. Each is housed in the trunk side terminal.

First, when a call is made by the subscriber 101, the subscriber circuit 102 detects this and activates a common control circuit (not shown), and the vacant call/receiver register 30 is activated.
Select 2 and switch main channel switch network 10.
The subscriber circuit 102 and the incoming and outgoing call register 302 are connected through the connection path 1 of No. 3. Next, when the subscriber 101 operates the dial on the telephone, a selection signal is sent to the outgoing/receiving register 302 via the subscriber circuit 102 and the main channel switch network 103, and the outgoing/incoming register 302 operates as a calling register.

On the other hand, when an incoming call is received from another station through the incoming trunk 301, the incoming trunk 301 detects this, activates a common control circuit (not shown), selects an empty incoming/outgoing register 302, and connects the register interface. The main communication path switch network 10 connects the line-side accommodation terminal of the incoming/outgoing call register 302 via the circuit 303 and the incoming call trunk 301.
connection path 5 of No. 3. In this state, the outgoing/incoming call register 302 sends out an outgoing or connection confirmation signal to the incoming call trunk 301 via the line side accommodation terminal of the main channel switch network 103. Subsequently, the selection signal sent from another station is relayed by the incoming trunk 301 and sent to the outgoing/incoming call register 3 for the main channel switch network 103.
The signal is sent to the outgoing/receiving register 302 via the line side accommodation terminal of 02 and the register interface circuit 303, and the incoming/outgoing register 302 operates as an incoming call register that receives selection signals from other stations. Note that the number of register interface circuits 303 dedicated to call/receive registers that accommodate the call/receiver registers 302 as line-side terminals of the main channel switch network 103 matches the number of call/receive registers 302.

As explained above, this invention allows the register used to be used for both outgoing and incoming calls, so the number of registers can be significantly reduced compared to conventional automatic telephone exchanges that have separate outgoing and incoming registers. This simplifies the circuit configuration and is economical. Furthermore, compared to the conventional system having a register for both incoming and outgoing calls, where the number of line side terminals to be occupied is determined according to the number of incoming trunks, in this invention, the number of line side terminals to be occupied is determined according to the number of registers. An automatic telephone exchange in which the number of incoming call trunks is larger than the number of registers has the advantage that it is economical because the number of line side terminals of the main channel switch network occupied by the outgoing and incoming call registers is small.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a conventional automatic telephone exchange with separate call registers and incoming call registers;
FIG. 3 is an explanatory diagram showing a conventional automatic telephone exchange equipped with a register for making and receiving calls, and FIG. 3 is an explanatory diagram showing an embodiment of an automatic telephone exchange equipped with a register for making and receiving calls according to the present invention. 101...Extension subscriber, 102...Subscriber circuit, 103...Main channel switch network,
104...Outgoing register, 105, 201, 30
1... Incoming trunk (incoming trunk), 106...
Incoming call register link, 107... Incoming call register,
202, 302...Call/receive register, 203
... Trunk interface circuit, 303 ... Register interface circuit, 1, 2, 3, 4, 5
...connection path.

Claims (1)

[Claims] 1 A register of an automatic telephone exchange configured to accommodate a subscriber circuit and a register interface circuit at a line side terminal of a main channel switch network, and an incoming trunk and an outgoing trunk at a trunk side terminal, respectively, When operating as an originating register, it is connected to the subscriber circuit using the trunk side terminal of the main channel switch network, and when operating as an incoming register, it is connected to the main channel switch network via the register interface circuit. A register of an automatic telephone exchange for both outgoing and incoming calls, which is housed in both the line side terminal and the trunk side terminal of the main communication path switch network, which is connected to the incoming trunk using the line side terminal.