JPS5923507B2 - Connection method of dedicated line and extension line via relay stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for connecting a leased line and an extension line via a relay stand, and more specifically, a method for connecting a leased line and an extension line to a relay stand in a private branch exchange having a function for connecting an incoming extension line to a central office line and a function for connecting a central office line requested outgoing line. This is related to the method of connecting via.

Conventional private branch exchanges that have incoming extension connection functions for central office lines and request outgoing connection functions for central office lines are used to connect outgoing leased lines from relay boards and connect incoming extension lines to relay stations from leased lines, as shown in Figure 1. Connect to the relay stand 3 via the connector 2 using the dedicated line originating/receiving trunk 1.
After confirming the call request, the call is returned and connected to the extension line via the main link 4, which is the connection path of the private branch exchange.

The reason why a private branch exchange, which is an automatic exchange, requires a manned relay board for monitoring is because there are calls and inquiries from unknown extension subscribers. This is because there remains a need to connect with other people. Conventionally, in order to achieve this function, a connector device was used to provide all dedicated line originating/receiving trunks 1 with the same functions as the central office line originating/receiving trunks, and to have a capacity twice as many as the number of lines connected to the relay stand. This made it expensive, even though the call volume was low. SUMMARY OF THE INVENTION An object of the present invention is to provide a dedicated line and extension line connection system that eliminates the drawbacks of the conventional system as described above and enables an economical system.

According to the present invention, there is provided a method for connecting a dedicated line and an extension line in a private branch exchange having a function to connect an incoming extension line to a central office line and a function to connect an incoming central line request to an extension line. Relay function and line side,
Adapter trunk (AD
A method for connecting the dedicated line and the extension line via a relay stand is proposed, which is characterized in that the dedicated line and the extension line are connected via a relay stand via T).

An embodiment of the system according to the present invention will be described in detail below with reference to FIG.

FIG. 2 shows the order in which a leased line is connected to an extension in the system according to the present invention, and when a call arrives on the leased line, an activation signal is first received from the leased line via the leased line originating/receiving trunk 11. The outgoing/incoming call register 13 is connected by the control section (not shown) of the exchange as in the conventional case, and receives a selection signal from the dedicated line via the main link 12 as shown in FIG. 2a.

As the next control procedure, the control unit connects the ringing trunk 14 to the line side of the adapter trunk 15 as shown in FIG. The linker is then sent to the adapter trunk 15. The adapter trunk 15 detects an incoming call from the relay stand by a linker detection circuit, and connects the adapter trunk 15 and the relay stand 16 as shown in FIG.
4, and the relay stand 16 and the dedicated line originating/receiving trunk 11 become busy via the adapter trunk 15. In the above state, the relay console 16 uses the central office line incoming extension connection function to call the second
The extension subscriber is called by connecting the ringing trunk 17 as shown in FIG. This function of connecting extension subscribers in 1,000-order connection order is no different from the conventional configuration shown in Figure 1 from the perspective of service to subscribers, but when considered as equipment, the number of lines corresponds to the number of dedicated lines or central office lines. The standard route is to go through a private branch exchange, which used to require all of the capacity wiring to be brought into the relay stand and returned through a dedicated route, and since it comes in through the exchange, only the upper limit of the number of simultaneous incoming calls considered in traffic is required. Since the number of wires (capacitance) can be considered as the number of wires, the number of wires (capacitance) can be considerably reduced. FIG. 3 shows an example of the adapter trunk 15, in which 21 is -48
A relay driven by a battery, 12a0 is an A relay contact, 22a, 22b are capacitors, 23 is a lever detection relay, 23a is a lever detection relay contact, 24
is the R relay for linker detection. As explained in detail above, according to the present invention, by using an adapter trunk to connect a leased line and an extension line via a relay stand, it is possible to connect an extension line from a leased line via a relay stand, and to connect a central office line via a relay stand. This is achieved by combining a dedicated line extension connection function and a central office line connection function via a relay stand, which can be performed in a unified manner using a method similar to the standard method.

As described above, according to the present invention, an adapter trunk is required, but a dedicated leased line control function is not required, and all leased line trunks are given the same functions as central office line trunks, and a device for connecting to a relay stand is provided. A more economical method can be constructed for the installation method.

[Brief explanation of the drawing]

Fig. 1 is a program diagram of a conventional method for connecting a dedicated line and an extension line via a relay stand, Fig. 2 is a block diagram of a method for connecting a dedicated line and an extension line via a relay stand according to the present invention, and Fig. 3 is a block diagram of a method for connecting a dedicated line and an extension line via a relay stand. FIG. 3 is a block diagram of the adapter trunk in FIG. 2; In the figure, 15 is an adapter trunk.

Claims (1)

[Claims] 1 A method for connecting a leased line and an extension line in a private branch exchange that has a function to connect an incoming extension to a central office line and an originating request to a central office line, and which connects the private line to an extension line with ringer detection, reverse detection, DP/PB signal relay functions, and line A method for connecting a dedicated line and an extension line via a relay stand, characterized in that the dedicated line and the extension line are connected via an adapter trunk (ADT) having one terminal on each side and one terminal on the trunk side.