JPS62171362A - Display system for number of opposite call subscriber - Google Patents

Abstract

PURPOSE:To know who is talking with a busy called subscriber through a private branch exchange in which a telephone set with a number display device is connected by displaying the telephone number of the opposite party who is engaged with the busy called subscriber when the telephone number of the busy called extension subscriber is dialed. CONSTITUTION:For example, when the subscriber of an extension telephone set 1 originates an dials the telephone number of an extension telephone set 2, a central controller CC 8 stores the telephone number of the called extension telephone set 2 in the address LEN1 of a memory device MEM 7 corresponding to the subscriber. Then, a path is set between the extension telephone sets 1 and 2 and when the subscriber of the extension telephone set 2 answers, the CC 8 detects that and stores the telephone number of the calling extension telephone set 1 in an address LEN2 of the MEM 7 corresponding to the called subscriber. In this state, a telephone set 3 originates and dials the telephone number of the extension telephone set 1. The CC 8 discriminates the LEN1 from the dial information, and reads the telephone number of the opposite extension telephone set 2 engaged with the extension telephone set 1 and sends it to a DPY control DPYC 9. The DPYC 9 sends this telephone number information to the number display device DPY 4 of the telephone set 3 and displays the information on the DPY 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a calling party number display system, and particularly to a method for displaying the calling party's telephone number on a telephone that dials the telephone number of a busy extension in a local exchange. Regarding the method of displaying the number of the called party.

[Conventional technology]

Conventionally, in this type of local exchange, if the extension dialed by a subscriber is busy, the subscriber can only know that the extension dialed is busy.

[Problems to be Solved by the Invention] In the conventional private branch exchange described above, if the extension dialed by the subscriber is busy, it is not possible to know with whom the busy extension is talking. There is a drawback.

[Means for solving problems]

The calling party number display method of the present invention is such that, in a private branch exchange that accommodates a telephone with a number display, the telephone number of the calling extension and the telephone number of the called extension dialed by the calling extension are displayed on the called extension. and a storage means for storing for each calling extension; and when a call is received from the telephone to either the calling extension or the called extension while the calling extension and the called extension are talking, the called party is being called; and control means for reading out the telephone number of the telephone from the storage means and displaying the telephone number on the number display of the telephone.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the calling party number display method of the present invention.

In the figure, the private branch exchange has a main switch (hereinafter referred to as 5W) 5 which accommodates an extension telephone 1.2 and a telephone 3 with a number display device (hereinafter referred to as DPY) 4, and a general call register (hereinafter referred to as 0RT) connected to 8w5. ) 6, a storage device (hereinafter referred to as MEM) 7 that stores the telephone number of the calling extension and the telephone number of the called extension dialed by the calling extension for each called extension and calling extension, respectively; It is provided with a central control unit (hereinafter referred to as Cc) 8 that controls sequence control, and a DPY control unit (hereinafter referred to as DPYC) 9 that sends the callee number information read from the MEM 7 by the CC8 to the DPY4.

Next, the operation of this embodiment will be explained by taking as an example a case where the telephone 3 dials the telephone number of the extension telephone charge 1 while the subscriber of the extension telephone 1-2 is talking through the SW 5.

For example, extension phone TL! When subscriber 1 makes a call and dials the telephone number of extension telephone 2, 0RT6 counts this dialing information and transfers it to CC8, as is generally known. The CC 8 stores dial information (the telephone number of the called extension telephone 2) at the address corresponding to the calling subscriber in the MEM 7, that is, the address indicated by the accommodation location information (hereinafter referred to as LEN) on the SWS of the extension telephone 1. Next, when the bus between extension telephones 1 and 2 is established via SW5 and the subscriber of extension telephone 2 responds, CC8 detects this and sends the address corresponding to the called subscriber in MEM7 (that is, the address indicated by LEN2). The telephone number of the calling extension telephone 1 is stored. In this state, when telephone 3 makes a call and dials the telephone number of extension telephone 1, this dial information is similarly transferred from 0RT6 to CC8. CC8 is L from this dial information.
EN.

, reads out the contents of the LEN and address of MEM7, that is, the telephone number of the other party's extension telephone 2 that is currently communicating with extension telephone 1, and sends it to DPYC9. DPYC9 sends this telephone number information to DPY4 of telephone 3 and is displayed on DPY4.

Similarly, when telephone 3 dials the telephone number of busy extension 2, the telephone number of the other party's extension 1 is D.
Displayed on PY4.

〔Effect of the invention〕

As explained above, the present invention has the advantage that when the telephone number dialed by an extension subscriber is that of a busy extension telephone, the called subscriber and the other party who is on the phone can be known.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the calling party number display method of the present invention. 1.2...Extension telephone, 3...Telephone, 4...Number display 3 (Dpy>, 5...Main switch Sochi (SW>-)
6... Transmission register (OR"r'), 7... Storage device (MEM), 8... Central control unit (CC), 9...
・DPY Control Department (DPYC>. Representative Patent Attorney Uchihara (Ma1.゛＼′-

Claims (1)

[Claims] In a private branch exchange that accommodates a telephone with a number display,
a storage means for storing a telephone number of a calling extension and a telephone number of a called extension dialed by the calling extension for each called extension and calling extension; and a storage means for storing a telephone number of a calling extension and a telephone number of a called extension dialed by the calling extension; and control means for reading out the telephone number of the other party being called from the storage means and displaying it on the number display of the telephone when a call is received from the telephone to either the calling extension or the called extension. A calling party number display method featuring: