Connecting Communities Using the Lotus Instant Messaging SIP Gateway

An IBM Redpaper publication

Published 15 March 2004, updated 16 March 2004

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IBM Form #: REDP-3834-00

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Authors: Heiko Mueller, William Tworek


The Session Initiation Protocol (SIP) Gateway is a new Lotus Instant Messaging (Sametime) feature in Release 3.1 that uses SIP to enable instant messaging and audio/video collaboration between two different Sametime communities. In this Redpaper we introduce the Lotus Instant Messaging SIP Gateway, and provide best practices for installing and utilizing this feature in your environment.

Table of contents

What is the Session Initiation Protocol (SIP)
Sametime SIP components
Setting up the SIP Gateway and Connector
Enabling Transport Layer Security (TLS)
Using client certificate authentication
The end-user experience
Example scenarios

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