JPS6064597A - Branch telephone set - Google Patents

Abstract

PURPOSE:To call individually a branch telephone set by providing a multi-frequency signal reception means receiving a branch telephone set identification number by a multi-frequency signal for pushbutton dial transmitted from a calling telephone set. CONSTITUTION:A connection circuit 12 of a calling signal set 51 of a push-button telephone set 5 and a brake contact rr7 of an RR relay 6 are provided and telephone set terminals L1, L2 are connected to an exchange 4 via a telephone line, and connected in parallel with other branch telephone sets near the telephone set 5. Moreover, a multi-frequency signal receiver (REC) 10 is connected to the terminals L1, L2 via a make contact hr11 of an HR relay 9. Since the REC10 is connected to the telephone line when all branch telephone sets hook on, the REC10 receives a branch telephone set identification number transmitted from the calling telephone set at first at the incoming and controls whether or nor a current is given to the 1st winding of the RR relay 6 accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a branch telephone connected to the telephone line of an automatic exchange and capable of being individually called.

For convenience of use, multiple telephones are often connected in parallel for residential telephones and premises telephones. Conventionally, this type of telephone is called a branch telephone, but since the telephone itself is the same as a standalone telephone, when it receives a ringing signal from the exchange, the ringing signals of all the telephones connected in parallel ring. Therefore, when a call is received, the first person to answer the fallen phone will answer, and if it is better to talk on another parallel-connected phone, the person on the other phone will be contacted by verbal means. A branch telephone is selected by having the telephone replaced. This causes inconveniences such as the caller may not be able to find the person he or she wants to talk to right away, and the callee is inconvenienced.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide a branch telephone that can individually ring a ringing signal.

The configuration of the branch telephone set of the present invention is such that the branch telephone set is connected to the telephone line of an automatic father exchange and each of the branch telephones is equipped with a ringing signal device, and receives a branch telephone identification number in the form of a multi-frequency signal for push-button dialing sent from a calling telephone. The present invention is characterized by comprising a multi-frequency signal receiving means, and a connecting means for connecting a ringing signal of a branch telephone having an identification number received by the multi-frequency signal receiving means to the telephone line.

Another feature of the present invention is that the calling signal device is normally connected to the local telephone line, and when the branch telephone identification number is received, the calling signal device of the branch telephone other than the received identification number is connected from the telephone line. In addition, by detecting the level of DC voltage of the telephone line connected to the branch telephone, it is possible to identify when on-hook and when off-hook. the branch telephone identification number; The present invention is to provide time-limiting means for closing the circuit that is being operated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, a description will be given of the operation of a normal exchange for sending out a paging signal. Figure 1 is a block diagram showing the connection of electronic exchanges, which have recently been widely used, when they are in the state of sending out a calling signal, and when a call has been made, dialed, and the incoming telephone number has been sent out by operation. The originating telephone (location A) l is connected to the ringing trunk (几BT) 42 through the exchange 40 and the communication path network 41'f, and is connected to the called terminating telephone (TEI) connected in parallel.
J, , B2) 2.3 are also connected to a calling signal trunk (LGT) 43 via a communication path network 41. On the other hand, the exchange 4 receives the incoming telephone 2 receiving the discharge signal,
In order to immediately connect the originating telephone 1 and the incoming call terminals 2 and 3 when either of the above 3 answers, both the originating and receiving telephone numbers are connected immediately after receiving the incoming telephone number from the originating telephone 1. A communication path and a communication trunk (IO'l') 44 in the communication path network 41 to which the filling machine can be connected are selected, and this communication path is stored in a storage device provided in a central processing unit (CC) 45. and the use of call trunks is on hold.

Next, an exchange to which the branch telephone of the present invention is connected;
The dialing operation for calling this branch telephone will be explained. This exchange operates within a very short period of time ( For example, 100 m5), this communication path is connected, and then the above-mentioned calling state is entered. The fact that the exchange takes such a connection process is that electronic exchanges that use the stored program control system, which has recently become widespread, frequently use the conventional program following the above-mentioned call route selection process. This can be easily implemented by adding a program that sets a call path using the same method as the program used and sets a time limit to restore the call again. In order to individually call the branch telephone according to the present invention connected to such an exchange, in addition to the conventional telephone number, a branch telephone identification number is previously assigned to each branch telephone belonging to the same telephone number, After dialing the called telephone number, the calling party continues to press-button dial the dialed digits of this branch telephone identification number. In this case, when the exchange 4 of this embodiment finishes receiving the predetermined incoming telephone number, it temporarily closes the selected communication path between the originating telephone and the terminating telephone as described above, so that the calling party finally dials the telephone number. The branch telephone identification number that continues to be used will be sent to the terminating telephone. On the other hand, the exchange opens the closed communication path and begins sending a ringing signal, and sends a ringing tone to the calling telephone, causing the calling party to stop dialing the branch telephone identification number that it has been sending. You will have to wait for the incoming phone to answer.

Next, the configuration and operation of the branch telephone according to the present invention will be explained. FIG. 2 is a block diagram of an embodiment of the present invention. In the figure, a push-button telephone 5 has a ringing signal (bell) 51 and a hook switch (H8I, H8
2,) 52, 53, push-button dial and transmitting/receiving circuit 5
4, a break contact (rr) 7 of an R relay 6 is provided in the connection circuit of the calling signal device 51. In addition, the telephone terminals (LX, L
2) 56.57 is connected to the exchange 4 via a telephone line and connected in parallel to other branch telephones near this telephone. On the other hand, an on/off hook identification circuit (HD) 8 is connected to two of the telephone terminals 56 and 57. When all branch telephones connected in parallel are on-hook, the voltage between these two terminals is sent from the exchange and double pressure ( 48v), and when any branch is off-hook,
This telephone line is connected with low resistance and the voltage sent from the exchange is much lower (generally less than IOV), so
The on-off hook identification lipstick 18 detects the voltage of these two terminals and operates when the HR relay 9 is on-hook.
Restore when off-hook. Furthermore, telephone terminal 56.
Multi-frequency signal receiver (REC) to 2 terminals of 57 is H)
It is connected via the make contact (hr) 11 of the L relay 9. Therefore, if all the branch telephones are on-hook, the multi-frequency signal receiver 10 is connected to the telephone line, so when receiving a call, the branch telephone floor number sent from the calling telephone is sent to a↓-. Receive.

The multi-frequency signal receiver 10 is composed of a push-button dial receiving circuit and a logic circuit that combines its output signals.If the received branch telephone identification number is the identification number of your own branch telephone, the multi-frequency signal receiver 10 does not allow current to flow through the first winding of the R relay 6 provided at its output and does not operate. Therefore, the next paging signal sent from the exchange 4 causes the paging signal device 51 to ring via the break contact (rr) 7f of the RR relay 6.

On the other hand, if the branch telephone identification number received by the multi-frequency signal receiver 10 is not its own identification number, current is applied to the first winding of the precise relay 6 to fully operate the relay and open the break contact 7. Then, in response to the ringing signal sent from the exchange 4, the ringer of the telephone does not ring. Note that it has its own make contact (rr) 12 and the HR relay 9 in series with the second winding of the RIJ relay.
Make contact (hr) 13 and time limit circuit (TM)
14 output make contacts (t m ) 1.5 are provided. This timer circuit 14 is activated when the multi-frequency signal receiver 10 receives the identification number and outputs the make contact 15.
is closed, and this make contact 15 is opened when a time limit 1111 has elapsed. Therefore, after the multi-frequency signal receiver 10 receives the identification number of another branch telephone and operates the R-receiver 6, the R-receiver 6 is put into the operating state by the circuit of this second winding. is held, and either one of the branch telephones goes off-hook and the HR relay 9 is restored, or the time limit circuit 14
will be restored once the time limit has elapsed. This time limit circuit 1
4 is a conversion function (provided to restore the RRIJ relay 6 when a calling signal is sent from the caller and the caller abandons the call and goes on-hook before the called party responds). The time limit is set by adding Yosuke to the normal response time after the call ends (for example, 30 seconds).

In addition, if the caller does not dial the incoming branch telephone identification 'Tit%9, or the necessary power is not provided to the on/off hook identification circuit 8 and the multifrequency signal receiver XO=・r of the present invention. In this case, the break contact (rr) 7 provided in series with the call signal device 51 remains closed, so when a call signal is sent from the exchanger, all connections are made in parallel. The ring signal of the branch telephone will ring.

As described above, as an embodiment of the present invention, each branch telephone has an on/off hook identification circuit 8, a multi-frequency signal receiver IO
The case where a circuit other than the conventional push-button telephone 5 such as By inserting it into the connection circuit of the call signal device of the branch telephone, circuits other than the push-button telephone 5 can be made common.

In addition, the time limit circuit 140 can be set to a suitably short time limit (for example, 10 to 15 SL), and if a response from the branch telephone that has received the identification number is not received within this time limit, the methodical relay 6 can be restored. A branch telephone ring signal with a short time limit can also be activated.

As described above in detail, the present invention has the advantage that branch telephones can be individually called.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the connection process of a currently used electronic exchange, and FIG. 2 is a block diagram showing an example of a branch telephone according to the present invention. l... Calling telephone (']'EL A), 2.3
...-Incoming telephone (place B,, place B2), 4...
...Switchboard, 5...Push-button telephone, 6...
... RR relay, 7.12... RR relay contact (rr)% s... On/off hook identification circuit (HD), 9... HRIJ relay, 10...
...Multi-frequency signal receiver, 11.13...H
R1, Lou contact (hr), 14... Time limit circuit ("M), 15... Output contact of time limit circuit 14 (
tm).

Claims (4)

[Claims] (1) Multi-frequency signal receiving means for receiving a branch telephone identification number in the form of a multi-frequency signal for push-button dialing sent from a calling telephone in a branch telephone connected to a telephone line of an automatic exchange and each equipped with a ringing signal device; 1. A branch telephone set, comprising: connecting means for connecting a calling signal device of the branch telephone set having an identification number received by the multi-frequency signal receiving means to the telephone line. (2) The connecting means normally connects the ringing signal to the telephone line, and when receiving the branch telephone identification number, releases the ringing signal of the branch telephone other than the received identification number from the telephone line. A branch telephone according to claim 1, characterized in that: (3) By detecting the high and low DC voltage of the telephone line connected to the branch telephone, it is possible to distinguish between on-hook and off-hook, and to disconnect the input of the multi-frequency signal receiving means from the telephone line when off-hook. Claim 1 characterized in that it is provided with an on-off hook identification means for releasing the hook.
Branch telephone as described in section. (4) It is characterized by comprising a time limit means for closing the circuit that opens the calling signal device from the telephone line when a certain period of time has elapsed since the multi-frequency signal receiving means received the branch telephone identification number. A branch telephone according to claim 1.