JPH0253357A - Telephone exchange - Google Patents

Abstract

PURPOSE:To confirm from which party a telephone call is incoming by permitting interruption only to an incoming call from a final calling destination with respect to a telephone set for which a special number is added to execute calling operation. CONSTITUTION:The calling operation is executed from a telephone set 23 to a telephone set 21. Then, a CPU7 receiving the telephone number information of the telephone set 23 from a speech path exchanging part 4 refers a memory area corresponding to the telephone set 21 of an interruption permission memory part 8 and confirms that an interruption permission flag is set to the telephone number of the telephone set 23. After that, an incoming tone (TO) to be outputted by a tone signal generating part 9 is sent to the telephone set 21 in busy state and a calling tone (RGT) is sent to the telephone set 23. Thus, the user of the telephone set 2 can know that the calling is just incoming from the telephone set 23 by the incoming tone (TO) interrupted into the calling condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone exchange, and more particularly to a telephone exchange that performs an interrupt connection to a busy line.

[Conventional technology]

Conventionally, as the interrupt connection method in telephone exchanges, there is a method that allows interruption to a telephone in progress only for an outgoing call with an interrupt special number attached, and a method in which an incoming call is made to the telephone in use. There was a system in which the telephone that was currently talking was notified that there was an incoming call.

[Problem to be solved by the invention]

Among the conventional interrupt connection methods mentioned above, the one that allows interruption by special number has the disadvantage that the caller is not able to know whether the other party's call content is in a state where it is acceptable to be interrupted. There is. Furthermore, in the case where a tone signal or the like is used to indicate that there is an incoming call when a telephone is in the 2-call state, the user who is currently talking has to answer all the incoming calls.

[Means to solve the problem]

The telephone of the present invention has a storage section and a final destination telephone number, which is the telephone number of the last telephone that the telephone to be accommodated made a call, is stored in the storage section in correspondence with the calling telephone, and a special number is added. When the telephone number of the called telephone is dialed, a flag indicating permission for interruption is set in the memory area corresponding to the calling telephone in the storage section, and thereafter, a flag indicating permission for interruption is set in the memory area of the storage unit corresponding to the calling telephone. If there is an incoming call,
Refers to the area corresponding to the telephone in the address storage section, and if the flag is set and the final destination telephone number matches the telephone number of the calling telephone, permission is given to interrupt the calling telephone. The control section to be

[For production]

Therefore, an interruption call to the telephone that has performed the calling operation to which the special number has been added is permitted only from the final called party.

For example, if the person you called is away,
This is useful when, after requesting a call back, you want to answer an incoming call from the person you requested to call back, even if you are waiting for a call back, or are on the line by calling another person. It is.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the telephone exchange of the present invention, FIG. 2 is a diagram showing the configuration of the interrupt permission memory section 8 in FIG. 1, and FIG. FIG.

The exchange 1 includes a line interface section 3, a communication path switching section 4 that connects telephones 21 to 20 connected via the line interface section 3, and a control section connected to the line interface section 3 and the communication path switching section 4. A device interface section 6, a register 5 that receives dial pulses sent from the communication path exchange section 4 and outputs them to the control device interface section 6, and a tone signal generator that outputs various toned components to the communication path exchange section 4. section 9, and each telephone 2. as shown in FIG. An interrupt permission memory section 8 that stores the subscriber number of the final destination telephone of ~2n and an interrupt permission flag indicating whether or not to permit an interrupt call to the telephone, a control device interface section 6, and an interrupt It consists of a CPU 7 connected to the permission memory section 8 and controlling connection operations and interrupt connection operations of subscriber terminals.

Next, the operation of this embodiment will be explained with reference to FIG.

Now, phone 2. When the call that called the telephone 23 ends, the CPU 7 sets the telephone number of the telephone 23, which is the telephone number of the final destination, in the memory area corresponding to the telephone 2 in the interrupt permission memory section 8. . After that, when the special number and the subscriber number of the telephone 22 are dialed without indicating that the telephone 21 will permit interruption only for the incoming call from the final destination, the telephone 22 is called and the call state (3rd party) is dialed. At the same time, an interrupt permission flag is set in the memory area corresponding to the telephone 2I in the interrupt permission memory section 8. In this state, a call operation is performed from the telephone 23 to the telephone 2I, and the CPU 7, which has received the telephone number information of the telephone 23 from the communication path switching section 4, refers to the memory area corresponding to the telephone 2I in the interrupt permission memory section 8. After confirming that the interrupt permission flag is set for the telephone number of the telephone 23, the tone signal generating section 9 outputs a warning (A F-f) to the telephone 21 which is in use.
(T O) and discharges n to the telephone 23.
(RG T) (Fig. 3(b)). Telephone 21
The user knows from the incoming call γf (TO) that interrupts the conversation state that a call from the telephone 23 is being received. Thereafter, when a hooking operation is performed on the telephone 21, the CPU 7 selects the telephone 2. and puts the telephone 23 into a talking state, and sends a holding tone (TI) to the telephone 22 (FIG. 3(C)). In this state, the telephone 23 returns to 11]
(FIG. 3(d)) or telephone 2. When the hooking operation is performed again (FIG. 3(e)), the telephone z1 and the telephone 22 are put into the talking state again.

In addition, if a hooking operation is performed, the telephone 23
A busy tone is sent.

〔Effect of the invention〕

As explained above, the present invention enables a telephone to which a special number is added and a call is made to interrupt only incoming calls from the final destination, so that the user of the telephone can receive calls from anywhere. This has the effect of confirming whether a call has been received.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the telephone exchange of the present invention, FIG. 2 is a diagram showing the configuration of the interrupt permission memory section 8- in FIG. 1, and FIG. FIG. 3 is a diagram showing a connection state of a telephone. 1-m-exchange, 2,. 22, 23. ..., 2n--Electrical packing machine, 4-11 Channel exchange section, 5-m-Register, 5--Control device interface section, 7--CPU, 8-m-Interrupt permission memory part, 9-m-tone signal generation part. Figure 2 (a) Figure 1 Figure 3 (C)

Claims (1)

[Scope of Claims] 1. In a telephone exchange, a storage section; and a final destination telephone number, which is the telephone number of the last telephone that was called by the telephone to be accommodated, is stored in the storage section in correspondence with the calling telephone. However, when the telephone number of the called telephone is dialed with a special number added, a flag indicating permission for interruption is set in the memory area of the storage unit corresponding to the calling telephone, and thereafter, When there is an incoming call to a telephone that is in a call state, the area corresponding to the telephone in the memory section is referred to, and a flag is set and the final destination telephone number is the telephone of the calling telephone. 1. A telephone exchange, comprising: a control unit that permits an interrupt call to the calling source telephone if the number matches the number.