JPS6295059A - Extension-to-extension camp-on system - Google Patents

Abstract

PURPOSE:To require no paying attention to the time when the user of an extension telephone set to be called respond by the user of a calling extension telephone set and to require no waiting for the response of the user of the extension telephone to be called set uselessly by providing a means for calling and returning the calling extension telephone set during an on-hook. CONSTITUTION:When the user of the extension telephone set 1 calls the extension telephone set 2, if the user of the extension telephone set 2 is absent, the user of the extension telephone set 1 executes an extension-to-extension camp on registration according to a predetermined method with respect to the extension telephone set 2. Then, the extension telephone set 2 registered in the extension-to extension-camp is hooked off and subsequently hooked, on, thereby a central control unit 6 controls an extension circuit 3 to transmit a ring tone to the extension telephone 1. When the extension telephone set 1 is hooked on, the central control unit 6 controls the extension circuit 4 to transmit the ring tone to the extension telephone set 2. When the extension telephone set 2 is hooked off, the extension telephone set 1 is connected to the extension telephone set 2 through a channel switch 5 and the user of both the extensions can speak.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mutual extension camp-on system for a storage program controlled automatic exchange.

[Conventional technology]

Conventionally, this type of mutual extension camp-on service can only be set up when the called extension telephone is busy.

[Problem that the invention seeks to solve]

The service using the conventional mutual extension camp-on method described above can only be set when the called extension is busy; In case of 9th match, this cannot be set.

[Means for resolving gaps]

In the mutual extension camp-on system of a storage program controlled automatic switching system, the present invention has means for calling back the calling extension when the called extension is off-hook and then on-hook in the central controller.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram of a relay system according to an embodiment of the present invention. In FIG. 1, 1 and 2 are extension telephones, which are connected to a call path switch 5 via extension circuits 3 and 4, respectively, and the call path switch 5 is connected to a central control unit f6. Here, when the user of extension telephone 1 calls extension telephone 2, and the user of extension 1 telephone 2 is absent, the user of extension telephone 1 calls extension telephone 2. This method allows mutual extension camp-on registration. Then, when the extension telephone 2 registered with extension mutual camp-on is off-hook and then on-hook, the central controller 6 controls the extension circuit 3f to issue a ring tone to the telephone 1. Send. Here, when extension telephone l is off-hook, central controller 6 controls extension circuit 4 to
! A ring tone is sent to the telephone 2. Next, when extension telephone 2 is off-hook, extension telephone 1 and extension telephone 2
is connected via the communication path switch 5f, and users of one extension line are in a state where they can talk.

〔Effect of the invention〕

As explained and explained above, in the present invention, when the user of the called extension telephone called by the calling extension telephone is absent, the user of the calling extension telephone can switch between extensions by a predetermined operation method. When camp-on registration is set and the called extension is off-hook and then on-hook, the calling extension is called back and the calling extension #i1
M? By turning off the handset and calling the called extension, the call will automatically be made even when the user of called extension 1 is not absent and the called extension is not busy. Since the calling extension telephone is connected, the user of the calling extension does not have to worry about when the called extension? There is an effect.

[Brief explanation of drawings]

FIG. 1 is a diagram of a relay system according to an embodiment of the present invention. 1.2...Extension telephone, 3.4...Extension circuit, 5...Call route switch, 6...
・Central control device. m ′ Agent Patent Attorney Uchihara Day , /゛〈〜,−

Claims (1)

[Claims] In the mutual extension camp-on system of a storage program-controlled automatic exchange, when the called extension is called from the calling extension telephone and the telephone is not busy, the calling extension telephone performs a predetermined operation to enable mutual extension camp-on. If registration is set, when the called extension goes off-hook and then goes on-hook, it will call back the calling extension and the calling extension will go off-hook and ring the called extension. A mutual extension camp-on system characterized by automatic connection with the telephone.