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Realization method for media stream conversion channel working mode switching on gateway

一种转换通道、工作方式的技术，应用在网络通信领域，能够解决网络损伤抵御能力弱、传真业务不稳定等问题，达到降低设备维护复杂度、准确切换、实现简单的效果

Inactive Publication Date: 2006-02-08
HUAWEI TECH CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0012] The shortcomings of this implementation scheme are also obvious. The transparent transmission method is relatively weak in resisting network damage. In the case of poor network conditions, it is likely to lead to instability of fax services. This is very important for many telecom operators and users totally unacceptable

Method used

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  • Realization method for media stream conversion channel working mode switching on gateway

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Embodiment Construction

[0032] The core idea of ​​the present invention is to distinguish whether the media flow on the gateway is sent by a high-speed facsimile machine or sent by a modem through the CM (call menu) signal sent in the negotiation process to both sides of the call, that is, distinguish the type of the media flow on the gateway, In this way, the media stream conversion channel on the gateway is switched to an accurate working mode, effectively ensuring the reliability of service transmission in network communication.

[0033] The present invention is realized based on the format characteristics of the CM signal.

[0034] According to the ITU-T V.8bis (ITU-T, International Telecommunication Union-Telecommunications Standardization Sector) agreement, after high-speed fax machines and MODEMs with a modem rate above 33.6k bps enter the negotiation process, the caller will answer The party sends ANSam or / ANSam signal to indicate its high-speed data device identity. After receiving the ANSa...

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Abstract

The invention relates to an accomplishing method for switching the operation modes of gateway media stream switching channel. The method comprises the steps as follow: signals sent by the data device passing through the gateway are detected, and the media stream switching channel is switched into a T38 fax operation mode in event of detecting signals from a common facsimile device; the media stream switching channel is switched into a completed transmission operation mode in event of detecting signals from a high speed data device; and a signal detection is further implemented, and no processing is implemented in event of detecting signals from a CM-MODEM, while the media stream switching channel is switched into a T38 fax operation mode in event of detecting CM-FAX signals. The invention can switch the operation modes of the media stream switching channel quickly and accurately only by detecting signals from the data devices, thereby decreasing the complexity of device maintenance.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for realizing the switching of the working mode of a media stream conversion channel on a gateway. Background technique [0002] With the rapid development of network technology, the use of packet technology to transmit multimedia becomes possible and becomes a reality. The integration trend of traditional communication technology and packet technology is becoming more and more obvious. Since the encoding methods of media streams transmitted in traditional communication networks and modern packet communication networks are different, codecs are required to encode media streams at the junction of traditional networks and packet networks. The conversion of the mode, the device that realizes this conversion is called a gateway. [0003] Currently, the media streams processed by the gateway mainly include voice streams, data streams, and video streams. The da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04N2201/0086H04N1/33323H04L12/66
Inventor 靳彤
Owner HUAWEI TECH CO LTD
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