AudioCodes Mediant 800B User Manual page 532


The device does not need to perform NAT traversal (for media) and all the users are in
the same domain.
Figure 28-5: SBC SIP Signaling without RTP Media Flow
The benefits of implementing the No Media Anchoring feature include the following:

Saves network bandwidth

Reduces CPU usage (no media handling)

Avoids interference in SDP negotiation and header manipulation on RTP/SRTP
The device handles the No Media Anchoring process as follows:
1. Identifies a No Media Anchoring call according to configuration and the call's
properties (such as source, destination, IP Group, and SRD).
2. Handles the identified No Media Anchoring call.
The No Media Anchoring feature is enabled for all calls (regardless of SRD), using the
global parameter, SBCDirectMedia. You can also enable No Media Anchoring per SRD (in
the SRD table), whereby calls belonging to this same SRD (source and destination) are
handled as No Media Anchoring (direct media) calls. This occurs even if the global
parameter is disabled.
User's Manual
Mediant 800B Gateway and E-SBC
532 Document #: LTRT-10620