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Call transfer method and equipment

A call transfer and telephone technology, applied in the field of communication, can solve the problems of occupying PSTN network resources, chaotic PSTN resource occupation, affecting the normal use of users, etc., and achieve the effect of rational use.

Active Publication Date: 2011-08-17
XINHUASAN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this time, when the IP phone calls are transferred, there will be a problem of occupying PSTN network resources:
[0011] Therefore, during the call between phone A and phone C, phone B cannot establish a new call with the PSTN, resulting in confusion in the occupation of PSTN resources, unable to rationally utilize PSTN resources, and affecting the normal use of users

Method used

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  • Call transfer method and equipment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0053] Embodiment 1 of the present invention provides a method for call transfer, which is applied to a system including a program-controlled exchange, a VoIP gateway, and multiple IP phones. Below to figure 2The network system shown is taken as an example to introduce the process of calling transfer initiated by the IP phone provided by the present invention. Wherein, the VoIP can be implemented based on the H.323 protocol or the SIP protocol, and the implementation of the VoIP based on the SIP protocol is used as an example for introduction below.

[0054] Such as Figure 4 As shown, when phone B needs to transfer the call to phone C, the call transfer process provided by the present invention includes the following steps:

[0055] In step 401, phone B sends a SIP (Session Initiation Protocol, Session Initiation Protocol) Notify message to notify the VoIP gateway to start the call forwarding service.

[0056] An example of the format of the SIP Notify message is as follo...

Embodiment 2

[0093] Embodiment 2 of the present invention provides a VoIP gateway, which is applied to a system including a program-controlled switch, the VoIP gateway and multiple IP phones, such as Image 6 shown, including:

[0094] The receiving unit 11 is configured to receive the call transfer notification message sent by the IP phone;

[0095] A call forwarding service signal processing unit 12, connected to the receiving unit 11, configured to send a call forwarding service signal to the program-controlled switch according to the call forwarding notification message, receive a response signal from the program-controlled switch and forward it to the IP phone;

[0096] The first call unit 13 is used to receive the number of the call forwarded sent by the IP phone according to the response signal and send it to the program-controlled switch, and forward the number after the call-forwarded phone goes off-hook according to the call of the program-controlled switch Voice streams betwee...

Embodiment 3

[0110] Embodiment 3 of the present invention provides a call transfer system, which is characterized in that it includes a program-controlled switch, a VoIP gateway, and a plurality of IP phones, wherein

[0111] The IP phone is configured to send a call transfer notification message to the VoIP gateway when its working mode is a binding mode;

[0112] The VoIP gateway is configured to receive a call transfer notification message sent by the IP phone, send a call transfer service signal to the program-controlled switch according to the call transfer notification message, receive a response signal from the program-controlled switch and forward it to the IP phone; when the phone for call transfer is off-hook according to the call of the program-controlled switch, forward the voice stream of the phone for call transfer and the IP phone; receive the call end message of the IP phone, and send to the program-controlled switch sending an on-hook signal of the trunk interface bound to...

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PUM

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Abstract

The invention discloses a call transfer method and equipment. In the invention, a VoIP (voice over Internet protocol) phone sends a call transfer notification message to a VoIP gateway; and after call transfer is ended, a private branch exchange (PBX) releases an FXO (foreign exchange office) interface bound by the IP phone through interaction between the VoIP gateway and the PBX, thus achieving the purpose of reasonable utilization of PSTN (public switched telephone network) resources.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and equipment for call transfer. Background technique [0002] Examples of traditional telephone networks are figure 1 As shown, including analog phone A, PSTN (Public Switched Telephone Network, public switched telephone network), PBX (Private Branch Exchange, program-controlled exchange) and analog phone B, C, the call initiated by A is connected to B or C through PBX to establish and A call between B or C. [0003] VoIP (Voice Over Internet Protocol, Voice over IP) technology transforms the traditional telephone network 1:1, connects the program-controlled switch to the subscriber line of the analog telephone, and connects to the trunk interface of the VoIP gateway, such as FXO (Foreign Exchange Office, external exchange Office) interface, the FXO interface is bound to the IP phone. The following trunk interface uses the FXO interface as an example for illustratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M3/54H04M7/00H04L29/06
Inventor 黄杰姝龙夫军
Owner XINHUASAN INFORMATION TECH CO LTD
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