Communication Manager uses the SIP to H.323 Direct Media feature to directly connect SIP stations or SIP trunks to H.323 stations, without using a media resource and shuffling the call.
When a call connects, the Direct Media feature signals a direct talk path from a SIP station or a SIP trunk to an H.323 station. The Direct Media feature can be activated on the Signaling Group screen, in the Initial IP-IP Direct Media field. To establish a direct path during a call setup, SIP stations and H.323 stations must use the same IP version, IPv4 or IPv6.
The benefits of using the SIP to H.323 Direct Media feature are:
Elimination of the SIP to H.323 call shuffling after the call connects
Elimination of clipping on the talk path
Decrease in the number of signaling messages for each SIP to H.323 call
Early detection of the media path in the call flow and use of fewer media processor resources to configure the system
Reduction in the processing time of each SIP-H.323 call, and increase in the SIP Busy Hour Call Completions (BHCC) capacity
For more information on the Initial IP-IP Direct Media field, see Avaya Aura®Communication Manager Screen Reference.
