AudioCodes Mediant 800B User Manual page 430


Calls between two SIP UA's in the same LAN and signals are sent to a SIP proxy
server (or hosted IP PBX) located in the WAN.
Figure ‎ 2 7-5: SBC SIP Signaling without RTP Media Flow
The benefits of implementing the No Media Anchoring include the following:

Saves network bandwidth

Reduces CPU usage (no RTP/SRTP handling)

Avoids interference in SDP negotiation and header manipulation on RTP/SRTP
The No Media Anchoring process is as follows:
Identifies a No Media Anchoring call - according to configuration and the call's
1.
properties (such as source, destination, IP Group, and SRD).
2. Handles the identified No Media Anchoring call.
The No Media Anchoring feature is enabled using the SBCDirectMedia parameter. You can
also enable No Media Anchoring per SRD (using the IntraSRDMediaAnchoring parameter),
whereby calls between two UA's that pertain to the same SRD (source and destination) are
handled as No Media Anchoring (direct media) calls.
User's Manual 430
Mediant 800B GW & E-SBC
Document #: LTRT-10274