NGN network system and method for rapidly switching corresponding medium channel of low speed Modem equipment

Abstract

The invention discloses an NGN network system and a quick switching method of a corresponding media channel of a low-speed Modem device of the NGN network system. After a called side media gateway of the NGN network system detects the existence of a low-speed signaling tone ANS, if the current mode is the soft switch control mode, a soft switch control device controls a calling side and the called side to switch to the low-speed voice frequency band data mode; if the current mode is the non-soft switch control mode, the called side media gateway automatically switches to the low-speed voice frequency band data mode, and the calling side media gateway switches to the low-speed voice frequency band data mode. The NGN network system and the quick switching method are aimed at the low-speed Modem device and realize that the calling side media gateway synchronously switches the media channels quickly and improve connection success rate of the low-speed Modem device.

Description

【Technical field】 [0001] The invention relates to the communication field, in particular to a method for switching media channels corresponding to an NGN network and a low-speed Modem device in the communication field. 【Background technique】 [0002] With the continuous development of telecommunication technology, the next generation network (NGN, Next Generation Network) has gradually replaced the traditional PSTN circuit switching network and become the mainstream. The NGN network mainly includes softswitches and media gateways. The softswitch is the main control device, which controls the media gateway for media negotiation and call control. The media gateway is a controlled device, which completes the conversion and transmission of call services and media under the control of the softswitch. [0003] Under the NGN network, the time division multiplexing (TDM) voice signal of the PSTN network is converted into a real-time protocol (RTP) message and transmitted on the IP n...

AI Technical Summary

Problems solved by technology

[0009] For low-speed Modem equipment, the disadvantage of using the softswitch full control method for switching: because the media gateway needs to set a timer after detecting the low-speed signal tone ANS, to determine whether there is a high-speed signal tone in the future, for low-speed Modem equipment, it must wait until the timer expires The softswitch can be reported to the softswitch, and the media negotiation and switching operations are completed by the softswitch. In this way, the best switching time point is missed, and fast switching cannot be achieved, which may easily cause the failure of the low-speed Modem service

Disadvantages of using V.152 self-switching mode: For all calls, it is necessary to pre-negotiate fax and Modem media at the establishment stage, which will occupy system resources. At the same time, the current NGN system rarely supports this switching mode , not universal

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