SIP Direct Media is supported by Communication Manager for Session Initiation Protocol (SIP) calls. SIP Direct Media signals the direct talk path between SIP endpoints before a call connects.
SIP Direct Media provides the following enhancements to SIP calls:
Eliminates shuffling of SIP calls after call connects.
Eliminates clipping on the talk path.
Reduces the number of signaling messages for each SIP call.
Reduces Communication Manager processing for each SIP call and increases the capacities of Communication Manager, Session Manager (SM), and SIP Busy Hour Call Completions (BHCC).
Determines the media path early in the call flow and uses fewer media processor resources to configure the system.
Note:
When you originate a SIP call through Avaya Integral Enterprise Edition (formerly called Tenovis I55) and route the SIP call through Session Manager to Communication Manager, the system disables the SIP Direct Media feature. This results in a successful call.