JPH0568100A - Subscriber call method - Google Patents

Abstract

PURPOSE:To allow a called subscriber to identify whether an incoming call is a call transferred from another station or a usual incoming call. CONSTITUTION:When a call reaching a called subscriber 2 accommodated in an exchange station A3 with an incoming transfer service given thereto is transferred to another exchange station B5 to be designated, the exchange station A3 starts a common line signal control circuit 8. The common line signal control circuit 8 adds incoming call transfer information representing a transfer call from another station to an address signal with additional information of a N0.7 common line signal system and outputs the result to a signal link 4. A common line signal control circuit 9 identifies incoming call transfer information from the received address signal, the exchange station B5 receives the information to send a call tone different from a usual call to a transfer destination subscriber 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for calling a subscriber for a call transfer call, and more particularly to a method for calling a subscriber for call transfer between stations.

[0002]

2. Description of the Related Art Conventionally, in a subscriber call in a call transfer between stations, the information for identifying whether the incoming call is a call transferred from another station or a normal incoming call is transmitted from the other station side. Since I do not have it, the same ring tone as that of a normal incoming call is used as the ring tone for an incoming call transfer between stations.

[0003]

SUMMARY OF THE INVENTION As described above, in the conventional subscriber calling method in call transfer between stations,
Since the transfer destination station does not have information for identifying the incoming call, the called subscriber cannot identify whether the incoming call is a call transferred from another station or a normal incoming call. there were.

[0004]

According to the subscriber calling method of the present invention, when a call received by a subscriber to which a call transfer service is provided is transferred to another designated station in a storage program control type exchange. , At the station that performs call forwarding,
No. 7 Incoming address transfer information indicating that the call has been transferred from another station is added to the address signal with additional information of the common line signaling system, and the station side to which the incoming call is transferred selects from the received address signal. The call transfer information is identified and a ringing tone different from that of a normal call is sent to the call transfer destination subscriber.

[0005]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining an embodiment of the present invention, in which a calling exchange A3 accommodating a calling subscriber 1 and a called subscriber 2 is a transfer destination subscriber via a telephone line 7. 6 shows an example in which a switching center B5 accommodating 6 is connected, and the switching centers A3 and B5 are provided with common line signal control devices 8 and 9, respectively, and are connected via a signal link 4.

The operation will be described below.

In FIG. 1, the called subscriber 2 is called a switching center B.
When the originating subscriber 1 calls the terminating subscriber 2 when the originating subscriber 1 has a call forwarding service to the forwarding subscriber 6 within the telephone 5, the exchange A3 identifies this and the common line signal control device. Start 8. The common line signal controller 8 is the signal link 4
Use No. 7 Incoming address transfer information is added to the address signal with additional information of the common line signal to activate the common line signal control device 9 of the receiving station.

Based on the sent address signal, the exchange B5 identifies that the call coming from the exchange A3 is a transfer call to the transfer destination subscriber 6 in the exchange B5, and the transfer destination subscriber 6 is notified. The ringing tone is changed from that of a normal incoming call.

[0010]

As described above, according to the present invention, when a call received by a subscriber who is provided with the call transfer service is transferred to another designated station, the station that performs the call transfer has N
o. 7 Incoming address transfer information indicating that the call is transferred from another station is added to the address signal with additional information of the common line signaling system, and the station side to which the incoming call is transferred receives the incoming call from the received address signal. Since the transfer information is identified and a ring tone different from that of a normal call is sent to the call transfer destination subscriber, the call receiving subscriber can determine whether the call is transferred from another station or a normal call. Can be identified.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Calling subscriber 2 Called subscriber 3 Switching center A 4 Signal link 5 Switching center B 6 Transferee subscriber 7 Call line 8, 9 Common line signal control device

Claims (1)

[Claims] 1. In a storage program control type exchange, when a call received by a subscriber to which a call transfer service is added is transferred to another designated station, the No. 7 Incoming address transfer information indicating that the call has been transferred from another station is added to the address signal with additional information of the common line signaling system, and the station side to which the incoming call is transferred selects from the received address signal. A method of calling a subscriber, characterized in that the call transfer information is identified, and a ringing tone different from that of a normal call is sent to a call transfer destination subscriber.