JPS61230596A - System for trunk indicating connection by subscriber - Google Patents

Abstract

PURPOSE:To enable the offering of a direct international call by a subscriber by connecting a subscriber's circuit with a truck when the subscriber dials a trunk indicated connection number and the state of the trunk corresponded with an equipment address is empty. CONSTITUTION:With hooking off a handset by a subscriber 7, an outgoing tone is transmitted to a Central Control Unit 4 and when the equipment 4 recognizes the outgoing tone from the subscriber 7, it establishes a connection (a) of the subscriber 7 with an empty register 3. At such a time, the subscriber 7, by listening a dial tone from the register 3, recognizes that a dialing is possible and dials the trunk indicated connection number. The register 3 which receives the number transmits the number to the equipment 4 and the equipment 4 transits it to a translation device 5. At the device 5, it is translated to the equipment address on the exchange network 2 of the trunk corresponded with the trunk indicated connection number. And the equipment 4 checks the state of a trunk 6 shown with the equipment address and when it is empty, a connection (b) is established and a subscriber's circuit 1 and the trunk 6 are connected. Thereby, the trunk 6 starts up the exchange of a station.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a trunk designated connection system by a subscriber in a private branch exchange.

(Prior Art 2) In a private branch exchange, numbers dialed by a subscriber's call are received, stored, and analyzed.

(Problem to be Solved by the Invention) However, since this dialed number is dangerous if it is a trunk route number, the subscriber can only be connected to an empty trunk among the trunk routes. It was unclear which trunk it was actually connected to.

This had the disadvantage that international calls could not be made because the subscriber number of the connected trunk was not known.

The object of the present invention is to solve the above-mentioned drawbacks by enabling subscribers to make trunk-specified connections in private branch exchanges, and to provide a system for trunk-specified connections by subscribers that allows subscribers to directly apply for international calls. It is about providing.

(Rounding Means for Solving Problems) In order to achieve the above object, a trunk designated connection system by a subscriber according to the present invention is a trunk connection system in a private branch exchange, in which when a subscriber dials a trunk designated connection number, register) and sends it to the translation device, the translation device determines the device address on the switching network of the trunk corresponding to the trunk specified connection number, checks the status of the trunk indicated by this device address, and checks whether it is empty or not. For example, the subscriber circuit of the subscriber who dialed the trunk designated connection number is connected to the trunk indicated by the equipment address.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a block diagram of a private branch exchange illustrating an embodiment of the trunk designated connection system according to the present invention. This figure shows the subscriber circuits connected to the registers and to the trunks.

In the figure, 1 is a subscriber circuit, 2 is a switching network,
3 is a register, 4 is a central control unit, 5 is a translator, 6 is a trunk, and 7 is all subscriber circuits.

A case in which subscriber 7 makes a trunk-designated connection will be explained.

When the subscriber 7 lifts the telephone handset, the subscriber circuitry senses this and communicates this to the central control unit 4 in a known manner.

The central control unit 4, knowing that the subscriber 7 has made a call, establishes a connection a using a known method, and connects the subscriber 7 and the free register 3.

The subscriber receives a dial tone t* sent through register 3.
＜This allows you to know that dialing is possible.

Subscriber 7 will dial the trunk designated connection number.

As an example, the trunk designated connection number may have the following configuration.

(1) Trunk designated connection access code (2) Trunk route number (3) When the trunk number register 3 receives the trunk designated connection number, it sends this trunk designated connection number to the central controller 4 in a known manner. The central control device 4 sends this to the translation device 5, which translates it into a device address on the switching network 2 of the trunk corresponding to this trunk designated connection number.The central control device 4 receives this device address, The status of the trunk 6 indicated by this equipment address is checked, and if it is empty, a connection b'6 is established and the subscriber circuit I and the trunk 6 are connected.

Trunk 6 will thereby activate the multi-office switch.

Through the above operations, it is possible to acquire a trunk according to the subscriber's designation.

Since the subscriber knows the central office subscriber number of the connected trunk, when applying for an international call, the subscriber can communicate the central office subscriber number to the international operator.

Also, by using the well-known direct in termination feature, the subscriber can answer directly when the international operator calls back and dials the subscriber number of the station. That is, it becomes possible to apply for an international call without the intervention of a private branch exchange operator. Furthermore, even when the operator is absent at night, international calls can be made without using the known telephone functions.

(Effects of the Invention) As described above, the present invention has the advantage that in a private branch exchange, a subscriber can call the trunk number 1 that he/she has captured, and therefore can directly apply for an international call.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the connection method according to the present invention. 1...Subscriber circuit 2...Switching network 3.
...Register 4...Central control circuit 5...Translation device 6...Trunk 7...Subscriber

Claims (1)

[Claims] In a trunk connection system in a private branch exchange, when a subscriber dials a designated trunk connection number, this is received by a register and sent to a translation device, and the translation device connects equipment on the trunk exchange network that corresponds to the trunk designated connection number. configured to ask for the address, check the status of the trunk indicated by this equipment address, and if empty, connect the subscriber circuit of the subscriber who dialed the trunk specified connection number with the trunk indicated by the equipment address. A subscriber-specified trunk connection method characterized by: