JPS5937627B2 - call forwarding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a call transfer system, and more particularly, to a call transfer system in which an incoming call is transferred to another telephone while remaining in a ringing state in a telephone exchange system.

Conventionally, transferring an incoming call has been limited to transferring the incoming call only after answering the incoming call and establishing a conversation state.

Therefore, even if you try to make a call using the phone at the same time as an incoming call, you will not be able to make the call unless you answer the incoming call, then end the call, or transfer the call to another phone. This was inconvenient when necessary. The present invention aims to eliminate the above-mentioned inconvenience and to transfer an incoming call to another telephone while keeping it in a ringing state by a specific simple operation, for example, to make it possible to make an emergency call. The drawings will be explained in detail below.

FIG. 1 is a relay system diagram of an example in which the present invention is implemented in a crossbar type exchange.

In the figure, an incoming call to a subscriber 5 via a central office line 1 and central office trunk 2 is connected to a communication path bus 4 of a network 3.
A subscriber's telephone 5 is called by a calling signal sent from the office line trunk 2. At this time, if the subscriber 5 wants to make a call without answering the incoming call due to an emergency, etc., or if the subscriber 5 does not have time to answer the call, if the subscriber 5 presses the transfer switch 6 provided corresponding to the telephone, the call will be forwarded. The requesting telephone detection and display circuit 8 and the control circuit 9 are activated, and the transfer requesting telephone detection and display circuit 8 detects and displays the transfer requesting subscriber's telephone from the activation input terminal, and the information is transmitted from the circuit 8 to the circuit 9. The control circuit 9 sends the information of the transfer requesting telephone to the translation circuit 10.
, the transfer group T to which the subscriber 5 belongs is determined, and the telephones of the other subscribers 11 within the group 7 are selected according to a certain logic or completely arbitrarily. The control circuit 9 receives the telephone information of the forwarded subscriber 11 from the translation circuit 10, controls the network 3, connects the telephone trunk 2 to the telephone line bus 12 of the subscriber 11, and connects the telephone line trunk 2 to the telephone of the subscriber 11. Release bus 4. As a result, subscriber 5's telephone becomes idle and is ready to make a call. On the other hand, subscriber 1
1 is called by a calling signal sent from the office line trunk 2 via the communication path bus 12. With the simple switch operation described above, the incoming call to subscriber 5 can be sent to subscriber 1 while remaining in the ringing state.
1 is realized. FIG. 2 is a relay system diagram of another embodiment of the present invention, in which an incoming call request to a subscriber 5 is from a subscriber 20 within the same station, and is transmitted via a communication path bus 21 and a trunk 22 within the own station. The transfer operation is realized in the same manner as in the embodiment of FIG. 1, except that the two terminals are connected together. FIG. 3 is a diagram of a relay system of a different example in which the present invention is implemented in a storage program control type exchange. In the case of an incoming call to subscriber 47 via central office line 40 and central office line trunk 41, network 42
A ringing tone trunk 44 and a central office line trunk 41 are connected via a communication path 43, and the ringing tone is transmitted to the central office line 40. On the other hand, the telephone of the called subscriber 47 is connected to the calling signal trunk 45 via the communication path 46, and the subscriber 47 is called. At this time, if the subscriber 47 wants to make a call without answering the incoming call due to an emergency, or if he or she does not have time to answer, the call will be transferred by pressing the transfer switch 53 provided corresponding to the telephone. The requesting telephone detection display circuit 48 displays that there is a transfer request. The processor 49 scans the transfer requesting telephone detection display circuit 48 through program processing, and when detecting a transfer request, identifies the transfer requesting telephone, determines the transfer group 50 to which the subscriber 47 of the telephone belongs, and selects the transfer request within the group 50. The telephones of other subscribers 51 are selected according to some logic or quite arbitrarily. Thereafter, the network 42 is controlled to connect the communication path 52 connecting the calling signal trunk 45 and the telephone of the subscriber 51, and to release the communication path 46. As a result, subscriber 47
The telephone becomes empty and outgoing calls become unavailable. On the other hand, the subscriber 51 is called by a calling signal sent from the calling signal trunk 45. By the simple switch operation described above, an incoming call to subscriber 47 can be transferred to subscriber 51 while remaining in the ringing state. FIG. 4 is a relay system diagram of still another embodiment of the present invention, in which an incoming call request to subscriber 47 is from subscriber 60 within the same station, and the ringing tone is transmitted from the ringing trunk 44 to the communication path. The transfer operation is implemented similarly to the embodiment of FIG. 3, except that it is sent via path 61.
As explained above, even if an incoming call is ringing, it is possible to transfer it to another predetermined phone with a simple switch operation, so you can avoid answering the incoming call due to urgent matters etc. This is effective when you want to make a call to someone else or when you don't have time to respond, and it has the effect of improving telephone service.

[Brief explanation of the drawing]

Fig. 1 is a relay system diagram of an example in which the present invention is applied to incoming connections of a crossbar type switch, Fig. 2 is a relay system diagram of an example in which the present invention is applied to internal connections of a crossbar type switch, and Fig. 3 is a diagram of a relay system in an example in which the present invention is applied to incoming connections of a crossbar type switch. FIG. 4 is a relay system diagram of an example in which the invention is applied to an incoming connection of a storage program controlled exchange; FIG. 1, 40... Office line, 2, 41... Office line trunk, 3, 42... Network, 4, 1
272L43, 46, 52, 61... Call path, 5, 11, 20, 47, 51, 60... Subscriber, 6, 53... Transfer switch, 7 ,50・
...Transfer group, 8, 48... Transfer request telephone detection display circuit, 9... Control circuit, 10
...Translation circuit, 22...Internal trunk, 44...Ring trunk, 45...
Calling signal trunk, 49...Processor.

Claims (1)

[Claims] 1. A telephone exchange system, comprising a transfer switch provided corresponding to a telephone, and a transfer request telephone detection and display circuit that detects and displays a telephone compatible with the transfer switch pressed to make a transfer request, and detects and displays the transfer request telephone. Detection of a transfer request from a trunk that is sending out a ringing signal based on the display output of a display circuit.Controlling the communication path set to the displayed telephone from the trunk to a transfer destination telephone different from the above-mentioned telephone to transfer the call. A call transfer method featuring: