JPS6081955A - Display system of number of calling subscriber - Google Patents

Abstract

PURPOSE:To allow a called subscriber to confirm a calling subscriber before answering by displaying the calling subscriber number on a called-side telephone set when the subscriber of an automatic section party telephone set PBX is connected to the subscriber of another PBX by dialing. CONSTITUTION:The calling-side automatic private branch exchange PBXA and called-side automatic private branch exchange PBXB of a calling subscriber number display system are connected to a public station exchange CO through a trunk-line trunk COT and an extension subscriber circuit LC. A PB signal receiving circuit PBR and the trunk COT are connected mutually with the switch SW of the exchange PBXB, and the circuit PBR receives an incoming signal and an additional dial signal from a calling extension STAA. Then the trunk COT and a called subscriber extension STAB are connected together and number display control circuits IND and CONT connected to a CPU display the calling subscriber number on the called subscriber extension STAB, allowing the called subscriber to confirm the calling subscriber before answering.

Description

[Detailed description of the invention] The present invention is a private automated telephone system (hereinafter referred to as PABX)
and PABX.

With a PABX, it is now possible to send additional dials after connecting to the other party's PABX through a central office line.

The purpose of the present invention is to provide a PABX with such an additional dialing system.
An object of the present invention is to provide a method for displaying the calling party's number by displaying the calling party's number to the other party.

A display is installed for each extension subscriber of the switchboard, and when the calling party's extension transmits the subscriber number of the called automatic private branch exchange and the extension number of the called automatic private branch exchange, the called automatic private branch exchange
The calling automatic private branch exchange captures the signal receiving circuit and sends a dial tone to the calling automatic private branch exchange, and the calling automatic private branch exchange also captures the PB signal receiving circuit and transmits the additional dialing performed by the calling party's extension to the FB of the calling automatic private branch exchange. PB received by the signal receiving circuit and connected to the central office trunk of the calling automatic private branch exchange
The calling party's extension number is sent from the signal transmitting circuit to the central office line, received by the PB signal receiving circuit of the called automatic private branch exchange, and the calling party's extension number is displayed on a display corresponding to the called extension subscriber. It's Nishide.

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

FIG. 1 is a diagram of a relay system between PBXs for explaining an embodiment of the call/indication system according to the present invention. In this figure, PBXA is the calling side and PBXB is the called side, and only the parts necessary for making and receiving calls are shown for each PBX.

Therefore, in the system of the present invention, both PBXs A and B are the central office line trunk O of the PBXA, which has parts that can be used as calling and called parties, including parts not shown.
The connection between the OT and the central office trunk OOT of the PBXB is made through the public exchange GO.

The PBXs A and B operate through the information control circuit 0ONT under the control of their respective central processing units CPU.

When extension subscriber 5TAA goes off-hook at PBX A and makes a call to the central office line, the subscriber circuit LO is connected to the central office trunk COT through switch SW, and when the number corresponding to called party extension 5TAB of PBX B is dialed, the subscriber circuit LO is connected to the central office trunk COT of PBX A. 00T is PBXH via public exchange CO
The call arrives at the central office trunk OOT. When the PBXB receives a call on the office line trunk OOT, it connects the PB signal receiving circuit PBR and the office line trunk COT through the switch SW, and
The signal receiving circuit PBR sends a dial tone DT to the office line trunk OOT.

On the other hand, the PBXA connects the subscriber circuit LO of the calling party's extension STAA so that additional dialing can be made from the calling party's extension 8T.
and the FB signal receiving circuit PBR are connected through a switch SW.

When the calling party extension 5TAA of the PBXA hears the dial tone DT sent from the PBXB via the public exchange CO, it learns whether additional dialing is possible.

Then, when the calling party extension S'l'AA performs an additional dial "X", the additional dial is received by the PB signal receiving circuit PBR of the PBXA.
U reads the calling party number of calling party extension 8 TAA, and the calling party number is converted into a PB signal by a PB signal transmitting circuit PBSD connected to the office line trunk OOT through a switch SW. and sent to the central office trunk OOT.

In PBX B, when the PB signal receiving circuit PBR receives the PB double signal sent through the public exchange CO, the central processing unit CPU controls the number display control circuit IND C-0NT through the information in control circuit 0ONT, and the called party The caller's number is displayed on a display provided for each extension.

As described above in detail, according to the present invention, PABX
When connecting directly from a subscriber of one PABX to a subscriber of another PABX via a central office line, the calling party
Since the dial sender of the BX sends the calling party's number to the called party's PAIIX and displays the calling party's number on the called party's telephone, it is possible to confirm the calling party, which was previously impossible, before the called party answers. This has the advantage of being able to be confirmed using a phone number display.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a relay system between the openings of a private exchange bag, showing an embodiment of the calling sauce-displaying system according to the present invention. 00...Public station exchange 1 0ONT...Information control circuit COT...Central processing unit DT...Dial tone IND 0ONT・$% display 1tjIJa circuit LO...
・Common subscriber circuit 1) I3 ratio...1) B signal receiving circuit PBSD...
・PB signal transmission circuit PBX &... Ako gutter automatic telephone exchange PBX
B...Called side ditch automatic telephone exchange JM machine S'rA...Subscriber telephone 5TAA...Caller's extension STA B...Called party's extension SW...Switch! +! Author: Hisashi Inoro, patent attorney

Claims (1)

[Claims] Additional dialing possible Table: A display is installed for each extension subscriber of the automatic private branch exchange, and when the calling party's extension sends the called automatic private branch exchange subscriber number and the extension number of the called automatic private branch exchange, the called automatic private branch exchange The switching equipment captures the PB signal receiving circuit and sends a dial tone to the originating automatic branch exchange, while the originating automatic private branch exchange captures the PB signal receiving circuit and automatically initiates the additional dialing performed by the calling party's extension. The PB signal is received by the PB signal receiving circuit of the private branch exchange, the FB signal transmitting circuit connected to the central office line trunk of the calling automatic private branch exchange sends the calling party's extension number to the central office line, and the PB signal of the called automatic private branch exchange is sent to the central office line. Received by signal receiving circuit and corresponds to the extension subscriber