Hardware Description and Reference for Avaya ... - Avaya Support
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Hardware Description and Reference for Avaya ... - Avaya Support

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Other Servers<br />

Server <strong>for</strong> <strong>Avaya</strong> SIP Enablement Services<br />

Server <strong>for</strong> <strong>Avaya</strong> SIP Enablement Services<br />

<strong>Avaya</strong> SIP Enablement Services (SES) is dedicated to providing a variety of converged<br />

communications services based on the Session Initiation Protocol (SIP). SIP is an<br />

endpoint-oriented, network messaging st<strong>and</strong>ard defined by the Internet Engineering Task<br />

Force. The fundamental concept behind SIP is that a user can have multiple devices.<br />

SES provides the necessary proxy, registrations, <strong>and</strong> redirection tasks necessary <strong>for</strong> SIP<br />

applications, such as Instant Messaging (IM). The server also provides the presence <strong>for</strong> use by<br />

SIP endpoints. An SES Release 3.1 server is set to communicate with one or more Linux-based<br />

media servers that run <strong>Avaya</strong> Communication Manager 3.1 or later. Then, the SIP proxy server<br />

supports communication among the various non-SIP endpoints <strong>and</strong> new SIP-enabled<br />

endpoints. Non-SIP endpoints supported by Communication Manager include analog, DCP, or<br />

H.323 stations <strong>and</strong> analog, digital or IP trunks. SIP endpoints include the <strong>Avaya</strong> 46XX Series<br />

SIP telephones, <strong>Avaya</strong> IP Softphone Release 5.1 <strong>and</strong> later, <strong>and</strong> <strong>Avaya</strong> SIP Softphone R2 <strong>and</strong><br />

later. These SIP endpoints are registered with the <strong>Avaya</strong> proxy. There<strong>for</strong>e, <strong>Avaya</strong> media servers<br />

can manage the SIP endpoints.<br />

Among other features, the SES Server proxies instant messages <strong>and</strong> provides presence<br />

functionality to support the <strong>Avaya</strong> IP Softphone. Meanwhile, <strong>Avaya</strong> Communication Manager<br />

h<strong>and</strong>les the voice <strong>and</strong> telephony features in the <strong>Avaya</strong> IP Softphone R5. <strong>Avaya</strong> Communication<br />

Manager provides added value to SIP endpoints by extending the SIP telephony feature set.<br />

Detailed description<br />

<strong>Avaya</strong>’s SIP architecture supports servers running SES of different types.<br />

There are several types of host architecture in the SES system:<br />

Edge server<br />

● SIngle edge server with one to 20 home servers<br />

● Combined home/edge server.<br />

The Edge server h<strong>and</strong>les SIP requests from all domains, <strong>for</strong>warding requests. These requests<br />

can be received from Home servers, from within the enterprise’s domain, <strong>and</strong> from other SIP<br />

proxies outside the enterprise’s domain. If an Edge server is used, then one or more Home<br />

servers must also exist in this architecture. Only one Edge server, or combined Home/Edge<br />

server, is allowed <strong>for</strong> any one domain. Edge servers can be duplexed <strong>for</strong> local failover.<br />

Issue 6 February 2007 93

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