JPS6239583B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a call transfer system in an automatic exchange, and more specifically to a system that allows calls to be transferred to a desired destination using an abbreviated number.

The abbreviated number in current abbreviated dialing services is a destination number unique to each telephone.
Therefore, when making a call from a public telephone or the like outside the home, the abbreviated number cannot be used and the national number must be dialed. However, there was the inconvenience of having to forget the national number and not being able to respond to calls to people who normally used an abbreviated number.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an extremely economical system that allows calls to be made from any telephone in the country using an abbreviated number unique to the subscriber (telephone).

In order to achieve the above object, the present invention prepares to receive an abbreviated number when a call is received on a telephone that has an abbreviated number registered and is in the process of starting a call forwarding service. A pre-registered destination number is read out using the abbreviated number dialed, and incoming calls are forwarded using this destination number. This allows calls to be made from any telephone in the country using the abbreviated number unique to the subscriber (telephone).

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

FIG. 1 is a relay system diagram according to the present invention, FIG. 2 is a state diagram showing call transfer registration, FIG. 3 is a state diagram showing one embodiment of call transfer connection processing according to the present invention, and FIG.
The figure shows one embodiment of the call transfer talk trunk according to the present invention, and FIG. 5 is a Carnot map of the trunk shown in FIG. 4. In the diagram, TF-TKT is a call forwarding talk trunk, TK is a talkie device, and PBREC is a
PB receiver, IRT is the incoming register trunk, ICT is the incoming trunk, OGT is the outgoing trunk, OST is the outgoing sender trunk, ORT is the outgoing register trunk, STT
is a special sound trunk. Further, LLF represents a line link frame, TLF represents a trunk link frame, and SUB.A, B, and C represent subscriber telephones. In FIG. 4, A and S are relays, _R1 to _R4 are resistors, and C is a capacitor. The operation will be explained below.

In FIG. 1, it is assumed that subscriber telephone SUB.A has registered an abbreviated number (eg, registered an abbreviated number for the telephone number of subscriber telephone SUB.C). In this case, when calling SUB.C from SUB.A, the connection is established by dialing the abbreviated number for SUB.C.

Next, the subscriber of SUB.A uses the phone SUB.A on the go.
The case where B calls SUB.C will be explained.
In this case, first register in advance to start call forwarding from SUB.A. This incoming call forwarding start or stop registration is performed in the same manner as the generally known control for starting or stopping the absentee notification service. That is, as shown in Figure 2, service subscriber SUB.A
The call forwarding start or stop special number to be dialed is received by the calling register trunk ORT, and the result is forwarded to a control device (not shown). The control device thereby completes the control by setting the incoming call transfer area in the subscriber memory corresponding to SUB.A when starting, and clearing when stopping. Then, the special sound trunk STT notifies SUB.A that the control of the subscriber memory has been successfully completed.

After registering to start call forwarding, a subscriber using the shortened number service on SUB.A can receive calls outside the home (other station).
When calling SUB.C from SUB.B, first call SUB.C.
Dial SUB.A's phone number from B. As shown in Figure 3, the connection control at this time is to receive the selection number sent from the other station's SUB.B via the incoming trunk ICT via the register trunk IRT using generally known incoming call control, and to send this result. Transfer to control device. The controller performs digit splitting on the received selected digits, followed by incoming call splitting. As a result, when it is identified that the call is to the service subscriber's telephone SUB.A, the corresponding subscriber memory is read, it is determined that the call transfer is being started, and the call transfer control is performed. That is, the control device selects the call forwarding talk trunk TF-TKT and transfers the trunk link frame.
Connect with ICT via TLF. As a result, the A relay in the TF-TKT shown in Figure 3 operates, and its contact a' starts the talkie device TK, and the contact
a ⁰ notifies the control device of activation via the scanning device SCN. As a result, the talkie device TK sends a talkie to the calling subscriber SUB.B indicating that the call will be transferred. After transmitting the tone, the control device operates the S relay by the relay drive device RC. That is, as shown in the Carnot map of FIG. 5, the talkie sending pattern is switched to the PB signal receiving pattern for receiving the recited number. With S relay operation, TF
- TKT stops firing to TK and PB receiver
Switch to PBREC and become ready to receive dials from calling subscriber SUB.B. When SUB.B who wishes to make an abbreviated re-dialing dials the abbreviated calling identification code and the abbreviated number for SUB.C, the dial signal is received by PBREC via TF-TKT and transferred to the control device. The control device has a predetermined
Read the information at a specific address in the abbreviated number memory for SUB.A, compare that information with the received recited number (abbreviated calling identification code), and if they match (symbol A in Figure 3), the following SUB. B receives the abbreviated number to dial. As a result, the abbreviated number is translated into the destination number in memory (SUB.C's phone number), the call is made again using that destination number, the call is forwarded as known, and SUB.B and SUB.C
and connect via ICT and OGT.

On the other hand, the dial reception state (S relay operating state in TF-TKT) is monitored for a certain period of time, and the condition is that there is no dialing during that time, or that the recitation number dialed by the calling subscriber matches the recorded recitation number. The condition for not doing so (jump symbol B in Figure 3)
In this case, the control device re-calls only the forwarding destination number registered in advance for each subscriber and performs general call forwarding.

In this example, the explanation was given on the assumption that both the call forwarding service subscriber and the calling party subscriber are PB (push-button dialing) subscribers, but the DP
Even in the case of a (rotary dial type) subscriber, the same thing can be done by enabling pulse relay after a response between the originating station and the terminating station.

As explained in detail above, according to the present invention, by simply configuring a PB receiver to be connected to a call forwarding talk trunk, calls can be made from any telephone nationwide using an abbreviated number unique to the subscriber (telephone). , there is no need to remember both the national number and the abbreviated number, improving service. Furthermore, since existing exchange equipment is used, the service can be provided extremely economically.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram according to the present invention, FIG. 2 is a state diagram showing call transfer registration, FIG. 3 is a state diagram showing one embodiment of call transfer connection processing according to the present invention, and FIG.
The figure shows one embodiment of the call transfer talk trunk according to the present invention, and FIG. 5 is a Carnot map of the trunk shown in FIG. 4. TF-TKT: Call forwarding talk trunk, TK:
Talkie device, PBREC: PB receiver, ICT: Incoming trunk, OGT: Outgoing trunk, IRT: Incoming register trunk, OST: Outgoing sender trunk, ORT: Outgoing register trunk, STT: Special sound trunk,
LLF: Line link frame, TLF: Trunk link frame, RC: Relay drive, SCN:
Scanning device, SUB.A, B, C: subscriber telephone;
A, S: Relay.

Claims (1)

[Claims] 1 When an automatic exchange with a call diversion service function receives a call to a subscriber who is registered for a call diversion service, it sends a message to the originating subscriber to the effect that the call diversion service is in progress, and then transfers the call to the subscriber. A call forwarding method characterized in that a destination number registered in advance for speed dialing by a subscriber of a call forwarding service is read out using an abbreviated number dialed by a person, and the incoming call is transferred using this destination number.