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Method for voice signal to break through firewall and network address converter

A technology of network address and firewall, which is applied in the field of tunnel-based voice signaling penetration through firewall and NAT, and can solve problems hindering the application of IP voice technology

Inactive Publication Date: 2007-01-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the equipment hinders the application of Voice over IP technology in such networks

Method used

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  • Method for voice signal to break through firewall and network address converter
  • Method for voice signal to break through firewall and network address converter
  • Method for voice signal to break through firewall and network address converter

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Embodiment Construction

[0025] Due to the shortage of IP addresses and the consideration of network security by network users, they generally need to establish their own private network, and set up NAT devices between the private network and the public network to complete the data exchange between the public and private networks. At this time, the access mode of the IP voice access device is as follows: image 3 As shown, multiple IP voice access devices (AG) are connected to NAT, and NAT is directly connected to MGC; when communicating, the media gateway controller opens a common port for the communication of VoIP packets; the voice access device communicates with the media The gateway controller sends a connection request to a specified port, and establishes a channel for VoIP message transmission; the voice access device loads the VoIP message to be sent with a VoIP type flag header and then encapsulates it into a normal communication message, and then transmits it from the above channel. Send to ...

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Abstract

The invention discloses a method for voice to penetrate the firewall and NAT. it includes: media gateway controller opens an universal port for communication of VoIP message; voice accessing device sends connection application to the media gateway controller, and creates channel of VoIP message transmission; the voice accessing device packages the VoIP message into normal communication message, and it is transmitted to media gateway controller; after the media gateway controller receive the message from the channel, packages it, and processes it in the correspondent message processing model. The invention makes MGCP, SIP, RTP and UDP message capable to penetrate NAT and firewall, thus realizes IP voice communication penetrating NAT and firewall.

Description

technical field [0001] The invention relates to a method for voice signaling to penetrate a firewall and a Network Address Translator (NAT), in particular to a method for tunnel-based voice signaling to penetrate a firewall and a NAT. Background technique [0002] Although the traditional public telephone network PSTN (Public Switched Telephone Network) based on time division multiplexing TDM (Time Division Multiplexer) can provide 64kbit / s (based on 2M link) service, the service and control are all completed by the switch. PSTN can guarantee excellent voice quality, but the operation of providing new services is relatively complicated and requires a long cycle, which makes operators feel powerless under the fierce competition of modern enterprises. At the same time, the development of computer technology and the increasing demand for computer interconnection have made IP-based packet switching data networks widely used, and the resource utilization rate of IP networks is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/66H04L29/06
Inventor 程治永
Owner HUAWEI TECH CO LTD