AudioCodes Mediant 800 User Manual page 397

CHAPTER 18 Core Entities
Media
'Media Realm'
media-realm-name
[SIPInterface_MediaRealm]
'Direct Media'
sbc-direct-media
[SIPInterface_SBCDirectMedia]
Parameter
Mediant 800 Gateway & E-SBC | User's Manual
Description
■ Call Setup Rules can be used to generated
source and destination tags. For classification,
only source tags are used.
■ The parameter is applicable only to the SBC
application.
Assigns a Media Realm to the SIP Interface.
By default, no value is defined.
To configure Media Realms, see
Realms.
Enables direct media (RTP/SRTP) flow (i.e., no
Media Anchoring) between endpoints associated with
the SIP Interface.
■ [0] Disable = (Default) Media Anchoring is
employed, whereby the media stream traverses
the device (and each leg uses a different coder or
coder parameters).
■ [1] Enable = No Media Anchoring. Media stream
flows directly between endpoints (i.e., does not
traverse the device - no Media Anchoring).
■ [2] Enable when Same NAT = No Media
Anchoring. Media stream flows directly between
endpoints if they are located behind the same
NAT.
For more information on direct media, see
Media.
Note:
■ If the parameter is enabled for direct media and
the two endpoints belong to the same SIP
Interface, calls cannot be established if the
following scenario exists:
✔
One of the endpoints is defined as a foreign
user (for example, "follow me service")
✔
and one endpoint is located on the WAN and
the other on the LAN.
The reason for the above is that in direct media,
the device does not interfere in the SIP signaling
such as manipulation of IP addresses, which is
necessary for calls between LAN and WAN.
■ To enable direct media for all calls, use the global
parameter SBCDirectMedia. If enabled, even if
the SIP Interface is disabled for direct media,
direct media is employed for calls belonging to the
SIP Interface.
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Configuring Media
Direct