Chapter 5. SIP Configuration

SIP (Session Initiation Protocol) is a protocol for creating and terminating various media stream sessions over an IP network. It is for example used for Internet telephone calls and distribution of video streams.

SIP takes care of the initiation, modification and termination of a session with one or more participants. The protocol makes it possible for the participants to agree on what media types they should share. You can find more information about SIP in appendix A of the User Manual and in RFC 3261.

You find examples on how to configure your 3Com VCX IP Telecommuting Module for SIP in chapter 4 of the User Manual.

Basic SIP configuration is made on the Basic, User database, and possibly also Sessions and Media pages. If you want to use an external SIP proxy, you must state this on the Routing page.

Basic

Here, you make basic settings for the Telecommuting Module SIP management.

General

Here, select whether the SIP module should be activated or not. If you select to turn the SIP module Off, no other SIP settings will have any effect.

SIP media port range

State a port interval which the Telecommuting Module should use for SIP media streams. You can use any high ports except 4500 (reserved for NAT-T) and 65097-65200 (reserved for RADIUS).

Enter the lower and upper limit of the port range that the Telecommuting Module should use for media streams. The upper limit must be at least as high as the lower limit.

SIP Servers To Monitor

Your Telecommuting Module can be made to monitor SIP servers, to check that they are alive. The information is used by the Telecommuting Module when SIP signaling should be passed on to the server in question. This is useful when a domain resolves to several individual hosts; the Telecommuting Module will know immediately if one of them is down, which will speed up the call connection.

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