JPS6237862B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic call forwarding system in a telephone exchange device such as a key telephone device or a private telephone exchange device.

This automatic call forwarding system is used to forward incoming calls to another specific phone when the person handling the phone is not available, and generally involves dialing a special number from the phone to register for forwarding. By dialing the forwarding destination number that specifies the forwarding destination telephone after making a call or operating the forwarding registration switch on the telephone, the forwarding destination number will be stored in the telephone exchange and used from now on. Incoming calls are automatically forwarded to the phone number specified.

In addition, when the handler returns to his or her desk and cancels the forwarding registration, the memory in the telephone exchange device is erased by dialing a special number for canceling the forwarding registration, so that the incoming call is not as expected. will be given to the telephone.

However, with the conventional automatic call forwarding method,
Even if the forwarding destination number is almost constant, after a cancellation operation, the forwarding destination number must be dialed each time a transfer registration operation is performed, resulting in a disadvantage that handling becomes troublesome.

In other words, when executives of corporate entities or organizations are not at their desks, they are generally present in the boardroom or reception room, and many times a day they come between their seats and the boardroom or reception room. If the secretary dials the same forwarding number every time the secretary makes a round trip between the two offices, there is a risk that this will become a major hindrance to business execution.

The present invention aims to fundamentally eliminate such drawbacks of the conventional technology, and in addition to the transfer registration operation, it also defines a non-update registration operation using a stored transfer destination number.
The memory of the forwarding destination number is updated according to the transfer registration operation after the registration cancellation operation, whereas the memory of the forwarding destination number is updated depending on the non-update registration operation after the registration cancellation operation, without having to dial the forwarding destination number. This provides an extremely effective automatic call forwarding system that simplifies the registration operation when the same forwarding destination number is used repeatedly by revalidating the forwarding destination number stored in the system.

The details of the present invention will be explained below with reference to block diagrams showing embodiments.

In the same figure, the incoming call information is sent by the logical value "1" on the incoming signal lines IR-1 to IR-N.
and the telephone TEL-1 installed correspondingly.
~Transfer control circuit CCT-1~ between TEL-N
CCT-N is inserted into each one, and the transfer control circuits CCT-1 to CCT-N are accommodated in the telephone exchange equipment.

In addition, between the transfer control circuits CCT-1 to CCT-N and the telephones TEL-1 to TEL-N, there are signal lines DTL-1 to DTL that are also used as communication lines or used exclusively for signal transmission.
-N, and the transmission and reception of incoming call information and dialing information using coded signals etc. is performed between the two.For this purpose, the transfer control circuits CCT-1 to CCT-N are vessel
TX and signal receiver RX are provided.

The configuration of the transfer control circuits CCT-2 to CCT-N is as follows.
-1, and in practice, the transfer control circuit CCT
-1 AND gate AND-1 is not necessary, but is required in the transfer control circuits CCT-2 to CCT-N, so it is included for illustrative purposes only.

In this case, for example, if telephone TEL-1 to telephone TEL-N is to be registered as a telephone with a forwarding destination number, first off-hook telephone TEL-1, and then the dial DK dials the number for forwarding registration. Alternatively, the corresponding function switch FK is operated to make a dial call using the number of the telephone TEL-N as the forwarding destination number.

Then, coded signals corresponding to these are sequentially sent out from a transceiver (not shown) to the signal line DTL-1, received by the signal receiver RX, and then given to the detection unit SDT as a coded signal.

The detection unit SDT, which serves as a discrimination means, is composed of a decoder, etc., and controls and sets the registration storage unit FLG according to the first transfer registration number, and also sets it to the next transfer destination number. If so, it immediately determines that a registration operation is currently being performed, gives a signal of logical value "1" to the AND gate AND-A, and at the same time sends a reset signal to the identification section ID and setting section SET. , reset these.

Therefore, the coded signal indicating the forwarding destination number from the signal receiver RX passes through the AND gate AND-A, is given to the shift register of the identification part ID, which consists of a shift register and a decoder, and is sent to each stage of this. By sequentially accumulating the signals, the serial signal is converted into a parallel signal, and further converted into a signal that sets the output QN to "1" by the decoder.

When the conversion operation of the decoder is completed, the identification part ID
Since a strobe signal is sent to the setting unit SET from SET, the output Q-N of “1” is stored in the setting unit SET, which is the first storage means consisting of N latch circuits, and according to this stored information, Then, a “1” signal is sent from the output TRS-N, and the AND
Gate AND-N is turned on.

On the other hand, the registration storage unit FLG, which is a second storage means using a flip-flop circuit or the like, is in the set state and sends out a signal of "1", and in response to this, the AND gate AND-C is turned on. , the inhibit type AND gate AND-B is turned off, so if there is an incoming call to the telephone TEL-1 from now on, the "1" signal indicating the incoming call information from the incoming signal line IR-1 will be turned off by the AND gate. AND-C and
Pass through AND gate AND-N and telephone TEL-N
to the terminating line IR-N.

Then, if transfer registration has not been performed on the telephone TEL-N, a signal of "1" is given to the signal transmitter TX via the AND gate AND-B in the transfer control circuit CCT-N, and the incoming call is Since a coded signal indicating the call is sent to the signal line DTL-N, the bell of the telephone TEL-N rings to notify the incoming call.

Next, when performing a registration cancellation operation, turn off the telephone TEL-1 and dial the registration cancellation number using the dial DK, or operate the function switch FK in accordance with this. A coded signal is sent out, received by the signal receiver RX, and then applied to the detection unit SDT.

The detection unit SDT controls the registration storage unit FLG again according to the code of the registration cancellation number and resets it, so the output of the storage unit FLG is “0”.
Accordingly, the AND gate AND−
B turns on and AND gate AND-C turns off.

At this time, since the transfer destination number is not accompanied, the detection unit SDT sets the signal to the AND gate AND-A to “0” state and does not send the reset signal, so that the identification unit ID and the setting unit The SET maintains the state at the time of transfer registration, and the setting unit SET stores information corresponding to the above-mentioned transfer destination number until the transfer registration operation involving the next transfer destination number.

Therefore, when there is an incoming call to the telephone TEL-1, a signal of "1" indicating the incoming call information from the incoming call line IR-1 is given to the signal transmitter TX via the AND gate AND-B, and the incoming call is sent to the signal transmitter TX via the AND gate AND-B. Since a coded signal indicating the
The bell rings to notify you of an incoming call.

In addition, if the operator of telephone TEL-1 is absent again and telephone TEL-N is to be registered as the forwarding number in the same way as described above, telephone TEL-1
After off-hook, a non-update registration operation using the previous forwarding destination number is performed.

In other words, if you dial a non-update registration number after off-hook, or operate the corresponding function switch FK, and then on-hook, coded signals corresponding to these are sequentially sent out, and the signal receiver Since the information is sent to the detection unit SDT via RX, the detection unit detects that it is a non-update registration operation based on the non-update registration information and on-hook information.
The SDT makes the determination and only controls the registration storage unit FLG.

Therefore, the registration storage unit FLG is set again and sends out a signal of “1”, AND gate AND-C is turned on, AND gate AND-B is turned off, and setting unit SET still outputs.
Under the condition that a signal of "1" is being sent from TRS-N, an incoming call to telephone TEL-1 is transferred to telephone TEL-N.

Furthermore, if telephone TEL-2 is to be registered as the forwarding number on telephone TEL-1, the same transfer registration operation as described above will be used to make a dial call using the number of telephone TEL-2 as the forwarding number. .

Then, a coded signal is sent out in accordance with these and given to the detection unit SDT via the signal receiver RX, so the detection unit SDT controls the registration storage unit FLG to set it, and also outputs the AND gate. By sending a "1" signal to AND-A and a reset signal to the identification section ID and setting section SET, the identification section ID and setting section SET are reset, and a new one is added to the identification section ID. A transfer destination number is given, and the information stored in the setting unit SET is updated accordingly.

Therefore, a signal of "1" is sent from the output TRS-2 of the setting section SET, and the AND gate AND-2 is turned on, and the AND gate AND-C is turned on in accordance with the setting of the registration storage section FLG. An incoming call to telephone TEL-1 is transferred to telephone TEL-2.

Therefore, the detection unit SDT determines whether the operation is a transfer registration operation or a non-update registration operation, and then, according to the result of this determination, the information stored in the setting unit SET is changed only when the transfer registration operation is accompanied by a transfer destination number. updated,
The transfer destination is specified according to this storage information, and the registration storage unit FLG controls switching to the transfer state in response to the transfer registration operation or non-update registration operation, thereby controlling the transfer operation and the transfer destination. Since each number is stored individually, the transfer destination number once registered can be used repeatedly with a simple operation, thereby simplifying the transfer registration operation.

However, a memory or the like may be used as the setting section SET and the registration storage section FLG, and the on-hook information is not used to determine the non-update registration operation in the detection section SDT, and the number or function switch FK for non-update registration is used. The same result can be obtained by using only the information of
The SDT, identification unit ID, etc. may be replaced with an arithmetic circuit mainly composed of a microprocessor or the like.

Also, depending on the conditions, a calling signal sending circuit may be used instead of the signal transmitter TX, and a signal receiver may be used instead of the signal transmitter TX.
As RX, a relay circuit that detects the closure of the DC loop on the telephone TEL-1 to TEL-N side may be used, or the function switch FK may be omitted, and the AND gates AND-A to AND- C,
NAND gates or the like may be used instead of AND-1 to AND-N.

Note that if the detection unit SDT determines the forwarding destination number at a sufficiently high speed compared to the transmission speed of the coded signal, the signal receiver RX and the AND gate
Just insert a delay circuit between AND-A,
The present invention is open to various modifications.

As is clear from the above explanation, according to the present invention, the transfer registration operation when the same forwarding destination number is repeatedly used is extremely simplified, and the purpose can be sufficiently achieved with a simple configuration. Remarkable effects can be obtained in various types of telephone exchange equipment that require this function.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the present invention. TEL-1 to TEL-N...telephone, DK...dial, FK...function switch, SDT...detection section (discrimination means), SET...setting section (first storage means), FLG...registration memory part (second storage means),
AND-A~AND-C, AND-1~AND-N...
AND gate, IR-1 to IR-N...Incoming signal lines,
CCT-1 to CCT-N...Transfer control circuit.

Claims (1)

[Claims] 1. In a telephone switching device that stores a forwarding destination number in response to a forwarding registration operation accompanied by a forwarding destination number on a telephone, and forwards an incoming call to the telephone after the storage to the telephone having the forwarding destination number, the forwarding registration is performed. determining means for determining whether the transfer registration operation or the non-update registration operation is in progress according to these operations; According to the determination result of the transfer registration operation, the transfer destination number and the corresponding transfer destination information associated with the transfer registration operation are stored until updating by the next transfer registration operation, and the transfer destination is specified according to the stored information. and a second storage means that stores transfer registration in progress and controls the transfer operation in response to either the transfer registration operation or the non-update registration operation. Automatic transfer method.