AudioCodes Media 800 MSBR - Page 251

Version 6.6 251 Mediant 800 MSBR
User's Manual 21. Coders and Profiles
Parameter Description
Web: Media Security Behavior
[IpProfile_SBCMediaSecurityBe
haviour]
Determines the transcoding method between SRTP and RTP
and enforce an SBC leg to use SRTP or RTP.
 [0] As is = (Default) No special handling for RTP\SRTP is
done.
 [1] SRTP = SBC legs negotiate only SRTP media lines, and
RTP media lines are removed from the incoming SDP
offer\answer.
 [2] RTP = SBC legs negotiate only RTP media lines, and
SRTP media lines are removed from the incoming
offer\answer.
 [3] Both = Each offer\answer is extended (if not already) to
two media lines - one RTP and the other SRTP.
If two SBC legs (after offer\answer negotiation) use different
security types (i.e., one RTP and the other SRTP), the device
performs RTP-SRTP transcoding. To transcode between RTP
and SRTP, the following prerequisites must be met:
 At least one supported SDP "crypto" attribute and
parameters
 EnableMediaSecurity must be set to 1
If one of the above transcoding prerequisites is not met, then:
 any value other than “As is” is discarded.
 if the incoming offer is SRTP, force transcoding, coder
transcoding, and DTMF extensions are not applied.
Web: RFC 2833 Behavior
[IpProfile_SBCRFC2833Behavio
r]
Determines the RFC 2833 SDP offer\answer negotiation.
 [0] As is = (Default) The device does not intervene in the
RFC 2833 negotiation.
 [1] Extend = Each outgoing offer\answer includes RFC 2833
in the offered SDP (the device adds RFC 2833 only if the
incoming offer does not include RFC 2833).
 [2] Disallow = The device removes RFC 2833 from the
incoming offer.
Web: Alternative DTMF Method
[IpProfile_SBCAlternativeDTMF
Method]
The device's first priority for DTMF method at each leg is RFC
2833. Therefore, if a specific leg negotiates RFC 2833
successfully, the chosen DTMF method for this leg is RFC
2833. For legs where RFC 2833 is not negotiated successfully,
the device uses this parameter to determine the chosen DTMF
method for the leg.
 [0] Don’t care = (Default) The device does not attempt to
interwork any special DTMF method.
 [1] Transparent = In Band
 [2] INFO - Cisco
 [3] INFO - Nortel
 [4] INFO - Lucent = INFO, Korea
Web: P-Asserted-Identity
[IpProfile_SBCAssertIdentity]
For a description, see the global parameter SBCAssertIdentity.
Web: SBC Fax Coders Group ID
[IpProfile_SBCFaxCodersGroup
ID]
Selects the supported fax coders (Coders Group ID) for fax
negotiation. Coders Groups are configured in the Coders Group
Settings table.