Administrator's Guide

Chapter 10. SIP Services

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, More About SIP,

and in RFC 3261.

The SIP module in the 3Com VCX IP Telecommuting Module handles SIP requests for

users who have registered on the Telecommuting Module itself or a machine connected to the

Telecommuting Module (see also Local Registrar). The Telecommuting Module receives the

request via the ﬁrewall (or, for the Standalone type, directly from the clients) and processes

it. When the SIP negotiation is ﬁnished, the Telecommuting Module lets the media streams

of this SIP session through. All media streams pass through the Telecommuting Module if

the clients are located on different ﬁrewall interfaces.

Administration of SIP

To enable the SIP function of the Telecommuting Module, you must at least conﬁgure on

the Basic Settings page.

These SIP functions are conﬁgured in the SIP Services section:

• SIP module on/off

• SIP logging

• Port range for SIP media

• Interoperability settings

• SIP timeouts

• Remote SIP Connectivity (requires a Remote SIP Connectivity Module)

Basic Settings

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

SIP Module

Here, select whether the SIP module should be enabled or disabled. If you select to Disable

SIP module, no other SIP settings will have any effect.

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