JPH01152854A - Extension telephone set calling system - Google Patents

Abstract

PURPOSE:To attain the talking between a caller and an extension subscriber replying at first during calling by calling plural extension subscribers simultaneously, registering the plural called extension subscribers in a storage device and referencing them. CONSTITUTION:When an extension telephone set 1 dials an extension number of other extension telephone set 2, the extension number of the extension telephone set 2 is counted by an outgoing register trunk 7. Simultaneously, a call tone 9 is sent through a telephone line 14 to the extension telephone set 3 and the outgoing register trunk 7 reaches the state receiving the next dial of the extension telephone set 1. When the extension number of the other extension telephone set 3 is dialed, the call signal is sent also to the subscriber circuit 6 of the telephone set 3 in addition to the subscriber circuit 5 of the telephone set 2 and stores the telephone set 3 in the called party storage device. When the telephone set 2 replies, the call signal of the telephone set 2 is stopped and the telephone set 3 is read from the called party storage device 15 to stop the call signal of the telephone set 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an extension telephone calling system in a private branch exchange, and more particularly to an extension telephone calling system that allows a plurality of extension telephones to be simultaneously called and a desired extension telephone to respond. .

(Prior Art) Conventionally, when calling an extension subscriber, a ringing signal is issued only from the telephone corresponding to the extension number of the extension subscriber, or a call signal is issued when the extension subscriber moves to another location. Either a calling signal is issued from the transfer destination telephone that performed the transfer operation, and in either case, the call is made from only one telephone.

(Problems to be Solved by the Invention) Conventional calls to extension subscribers, except for call forwarding, are only made to the telephone A corresponding to the extension number, and calls to telephone A, including call forwarding, are made simultaneously with calls to telephone A. It is not possible to make a call to multiple telephones BSC... having extension numbers. Therefore, if an extension subscriber moves irregularly between extension telephones A and B installed in an unoccupied place, and when a call is received by extension telephone A and extension telephone B, There was a drawback that it could not respond if there was someone there. In such cases, it has been possible to set variable absentee forwarding, but this has the inconvenience of having to repeat registration/cancellation every time the user moves.

The present invention eliminates such conventional problems, and allows calling signals to be sent to multiple different extension subscriber telephones at the same time.
The object of the present invention is to provide an extension telephone calling system that allows a response to be made from any one of these telephones.

(Means for Solving the Problems) The extension telephone calling system of the present invention includes a means for receiving an extension number B while calling a called extension subscriber A at the time of receiving a call, and a means for receiving an extension number B while calling a called extension subscriber A, and a plurality of called a storage device for storing extension subscribers; and means for simultaneously calling called extension subscriber A and extension subscriber B corresponding to extension number B' and connecting the called extension subscriber who responded first to the calling party. Provided in a private branch exchange, when a calling party dials another extension number while calling an extension subscriber, calls multiple extension subscribers at the same time and registers and references multiple called extension subscribers in the storage device. This allows the extension subscriber who answers first during a call to talk to the caller.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a relay system when a plurality of extension telephones are called using the extension telephone calling method of the present invention and a call connection is established with one of them, and FIG. 2 is a block diagram showing a relay system according to the present invention. FIG. 1 is a block diagram schematically showing an example of the device. In FIG. 1, the extension telephones 1.2.3 are arranged so that they can be connected to each other by means of a call path switch 10 via extension subscriber circuits 4.5.6. First, when an extension telephone 1 dials the extension number of another extension telephone 2 in FIG. is analyzed by the subscriber circuit 5 under the control of the central controller 11.
A calling signal is sent to the extension telephone 2 through the caller, and at this time, the extension telephone 2 is stored in At of the called party storage device 15 as shown in FIG. At the same time, a ringing tone 9 is emitted to the extension telephone 3 through the communication path 14, and the calling register trunk 7 is ready to receive the next dial of the extension telephone 1. When the extension telephone 1 dials the extension number of another extension telephone 3 from this state, the dials counted by the calling register trunk 7 are analyzed by the central control unit 11, which In addition, a calling signal is also sent to the subscriber circuit 6 of the extension telephone 3, and A of the called party storage device 15 in FIG.
The extension telephone 3 is stored in the 2 area.

When the extension telephone 2 answers here, the central control device 11 stops the ringing signal of this extension telephone 2, reads the extension telephone 3 from the called party storage device 15, and stops the ringing signal of the extension telephone 3, A call bus 12 is formed, and extension telephones 1 and 2 can make calls. Also, if extension telephone 3 answers first, a call path 13 is formed and extension telephone 1
and 3 can now talk.

In the above-described embodiment, a case has been described in which two telephone extensions are called at the same time, but by increasing the capacity of the storage device 15, it is also possible to call three or more telephone extensions at the same time.

(Effects of the Invention) As explained above, according to the present invention, by the calling party dialing a plurality of different extension numbers in succession, it is possible to simultaneously call a plurality of telephone extensions, and which You can also answer from the called extension. Therefore, when an extension subscriber is away from his or her desk and frequently moves from place to place where the extension telephone is installed, there is an effect that when an incoming call is received, the subscriber can answer from any extension telephone closest to him/her.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an extension telephone relay system using the extension telephone calling method of the present invention, and FIG. 2 is a diagram schematically showing the stored contents of a called party storage device according to an embodiment of the present invention. . 1.2.3... Extension telephone, 4.5.6... Extension subscriber circuit, 7... Calling register trunk, 8... Calling signal source, 10... Call path switch, 11. ...Central control unit, 12.13...Telephone bus,
14... Call path, 15... Called party storage device. Agent Patent Attorney Toshiyoshi Somekawa Figure 1 Figure 2

Claims (1)

[Claims] In an extension telephone calling system in a private branch exchange, a means for receiving another extension number dialed by a calling party while calling a certain called extension subscriber, and a means for receiving a plurality of called extension subscribers corresponding to the calling extension subscriber. A private branch exchange is provided with a storage means for storing a number of extensions, and when a calling party dials another extension number while calling a certain called extension subscriber, the private branch exchange simultaneously calls a plurality of extension subscribers, and Extension telephone calling, characterized in that by registering and referencing a plurality of called extension subscribers in the storage means, the calling party is connected to the called extension subscriber who responds first during simultaneous ringing. method.