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RFC 3261, and so interoperates with any SIP-enabled endpoint/station that also complies with 
the standard.

 shows the maximum number of SIP trunks supported out of the total number of IP 

trunks supported.

Avaya Communication Manager supports SIP endpoints, including the Avaya 4602 SIP 
Telephone and Avaya IP Softphone Release 5. In addition to its IP telephony capabilities, IP 
Softphone R5 also includes Instant Messaging (IM) client software, which is a SIP-enabled 
application that connects to the Avaya Converged Communication Server for IM control. By 
means of having SIP-enabled endpoints managed by Communication Manager, many features 
can be extended to these endpoints. The servers (S8300, S8500 or S8700-series) function in 
four ways:

●

As Plain Old Telephone Service (POTS) gateways

●

As support for name and number delivery between and among the various non-SIP 
endpoints supported by Communication Manager

For instance, analog, DCP (Digital Communications Protocol) or H.323 stations, and 
analog, digital or IP (internet protocol) trunks.

●

As support for new SIP-enabled endpoints, such as the Avaya 4602 SIP telephone

●

As a telephony feature server to SIP endpoints

The set of features supported by SIP itself is augmented by those supported by 
Communication Manager.

Avaya SIP Enablement Services (SES) is part of the Converged Communications Server 
portfolio with Application Enablement Services (AES). Prior to SES 3.0, SES was named 
Converged Communications Server as a product name, but that was later made a portfolio-level 

S8700-series 

(fiber-PNC or IP-PNC)

5000 of 8000

S8500

800 of 800

S8400

400 of 400

S8300/G700/G350

450 of 450

S8300/G250

10 of 10