JPS639352A - Voice call system - Google Patents

Abstract

PURPOSE:To attain voice call between stations by using a common line signal system and sending a voice call request signal via a common line signal path so as to allow the similar operation of the voice call system in its own station. CONSTITUTION:In calling a called party 11 from a sender subscriber 10, the subscriber 10 holds a channel 50 with a common line trunk 40 being acquired by means of hooking or the like and acquires a register trunk 60 to close a channel 52. Then a voice call request is processed into a signal by dialing a special number of the voice call from the sender subscriber 10 and the result is sent to an incoming station 21 via a common line signal path 41. The incoming station 21 receiving a voice call request signal from the common line signal path 41 restores a busy tone 30 sent to the sender subscriber 10 and a call signal 31 sent to the called party 11 via the common line trunk 40. Then the channel 51 between the called party 11 and the common line trunk 40 is closed to attain the call of the called party 11 by the voice call of the sender 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is based on a system in which two private branch exchanges (PBXs) are connected by a common line signaling method, and a subscriber on one exchange receives voice information on the other exchange. Used for paging (a method of making a call in which the calling party's voice is directly transmitted to the loudspeaker of the called telephone without the called telephone going off-hook).

〔overview〕

The present invention provides a voice calling system for telephone communication, which uses a common channel signal system and transmits a voice call request signal via the common channel signal path, thereby allowing communication between stations in the same way as the voice calling system within one's own station. This allows voice calls to be made throughout the country.

[Conventional technology]

In the conventional voice calling system, if the called extension subscriber does not answer within the own station, the calling subscriber performs a specific operation (for example, a hooking operation followed by dialing a specific number) to make a voice call and answer the call. It is possible to encourage

[Problem that the invention seeks to solve]

However, in such conventional voice calling systems, when calling the extension subscriber of the other station via a dedicated line, etc., it is difficult to transmit this request to the destination station in response to the calling subscriber's voice call request. had the disadvantage that it was impossible as long as the individual line signaling system was used.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned drawbacks, and it is an object of the present invention to provide a voice call system that allows voice calls to be made between stations.

[Means for solving problems]

The present invention comprises a plurality of electronic exchanges connected to each other via a common line signal path, and each of the plurality of electronic exchanges is configured to perform the above-mentioned voice call system using a common line signal system, each of which includes means for making a voice call. The means for making a call includes means for transmitting a voice call request signal to the other party's electronic exchange via a corresponding common line signal path under the operation of the originating subscriber, and a means for transmitting a voice call request signal based on the voice call request signal transmitted from the common signal line. and means for setting and closing a communication path between the common line trunk acquired by the originating subscriber and the terminating subscriber in a voice call state.

[Effect]

The originating station identifies an operation indicating a voice call request within the originating subscriber's own station, converts the voice call request into a signal to the terminating station, and transmits it via the common signal path. The terminating station also identifies this voice call request signal and sets and closes the communication path between the common line trunk, which has been acquired between the originating and terminating subscribers, and the terminating subscriber, into a voice call state.

With the above operations, voice calls can be made between stations with the same operations as within the own station.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a connection diagram of an embodiment of the present invention. A state in which two electronic exchanges 12 are connected by a common line trunk 40 and a common line signal path 41 is shown. In this example, the electronic exchange 1 is on the originating station side, and the electronic exchange 2 is on the terminating station side.

Each electronic exchange m1.2 has a respective central control unit 71.7
2, whose central control units 71 and 72 are coupled by a known common line signal path 41.

The operation of the voice calling device having such a configuration will be explained. FIG. 2 is a connection diagram when a voice call request signal is sent out via the common line signal path of the voice call device of the present invention.

FIG. 3 is a connection diagram of the voice call device of the present invention after receiving the voice call request signal.

FIG. 1 shows a case in which an originating subscriber 10 is calling a terminating subscriber 11 via a common line trunk 40. In FIG.

If the calling subscriber 10 is a regular telephone, as shown in FIG. The communication path 52 is closed. Subsequently, by dialing a special number for a voice call from the originating subscriber 10, a voice call request is converted into a signal and transmitted to the destination station 21 via the common line signal path 41. Further, in FIG. 1, if the originating subscriber 10 uses a multi-function telephone, by pressing a predetermined service button, a signal for requesting a voice call is similarly transmitted to the terminating station 21 via the common line signal path 41. do.

On the other hand, at the receiving station 21 which has received the voice call request signal from the common channel signal path 41, the called subscriber 11
The calling signal 31 that is being sent to the common line trunk 4
0 to the calling subscriber IO
0 is restored, the communication path 51 between the terminating subscriber 11 and the common line trunk 40 is closed, allowing the terminating subscriber 11 to be called by the voice call of the originating subscriber 10.

〔Effect of the invention〕

As described above, the present invention has the false effect of making it possible to easily implement a voice calling system between stations, just as the voice calling system within the own station, by utilizing a common channel signal.

[Brief explanation of drawings]

FIG. 1 is a connection diagram of a voice calling device according to an embodiment of the present invention. FIG. 2 is a connection diagram when a voice call request signal is sent through the common line signal path of the voice call device of the present invention. FIG. 3 is a connection diagram of the voice call device of the present invention after receiving a voice call request signal. lO...Originating subscriber, 11...Incoming subscriber, 20...
... Call path switch on the calling station side, 21... Call path switch on the receiving station side, 30... Ringing tone (RBT) generator, 31... Ringing signal (RG) generator, 40. ...Common line trunk, 41...Common line signal path, 50.51.
52...Call path link, 60.61.62...Register trunk, 71.72...Central control unit. Patent applicant NEC Corporation,. Example of loss of voice and the number of words used in the speech. Brother 3 Figure

Claims (1)

[Claims] (1) A plurality of electronic exchanges are provided which are connected to each other via a common line signal path, and each of the plurality of electronic exchanges is configured to perform the above-mentioned call in a common line signal type voice call method including a means for making a voice call. The means for transmitting the voice call request signal based on the voice call request signal transmitted from the common signal path includes means for transmitting the voice call request signal to the electronic exchange of the other party via the corresponding common line signal path by the operation of the originating subscriber. 1. A voice calling system comprising means for setting and closing a communication path between a common line trunk acquired by a calling subscriber and a called subscriber in a voice calling state.