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Avaya Media Gateways support voice traffic and signaling traffic that is routed between 
circuit-switched networks and packet-switched networks. The Gateways support all the 
applications and adjuncts that can be used with the Avaya DEFINITY Enterprise 
Communications Servers (DEFINITY ECS). These Gateways work with standards-based data 
networks and easily connect with the Public Switched Telephone Network (PSTN).
Communication Manager is extensible to IP, digital and analog telephones, and wireless 
business solutions. Avaya Communication Devices work with the full feature set of 
Communication Manager to help enterprises be more productive by providing anytime, 
anywhere access to maximize business continuity.

Avaya Communication Manager provides user and system management functionality, intelligent 
call routing, application integration and extensibility, and enterprise communications networking. 
Communication Manager operates on Avaya servers, and on the existing family of DEFINITY 
servers. For more information on the Avaya Application Solutions related features of 
Communication Manager, see 

An Avaya server provides centralized, enterprise-class call processing. This call processing can 
be distributed across a multi-protocol network (including IP) to support a highly diversified 
network architecture that consists of headquarters, branch, remote, small, and home offices.

The Avaya S8300, S8400, S8500, S8700-series, and SES-SIP are Linux-based servers. These 
servers support:

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Distributed IP Networking and centralized call processing across multi-service networks

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Dual server design with hot fail-over (S8700-series Server only)

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Redundant LAN Interfaces and remote survivable call processing

For more information on the architecture and the functionality of the servers, see Hardware 
Description and Reference for Avaya Communication Manager, 555-245-207.

Avaya Communication Manager also runs on the following DEFINITY Servers, which can be 
IP-enabled: