CHAPTER19 Coders and Profiles
Mediant 4000 SBC | User's Manual
Parameter Description
Note: The parameter value cannot contain a forward slash
(/).
'Created By Routing Server'
[IpProfile_
CreatedByRoutingServer]
(Read-only) Indicates whether the IP Profile was created
by a third-party routing server:
■ [0] No
■ [1] Yes
For more information on the third-party routing server
feature, see Centralized Third-Party Routing Server.
Media Security
'SBC Media Security Mode'
sbc-media-security-
behaviour
[IpProfile_
SBCMediaSecurityBehaviour]
Defines the handling of RTP and SRTP for the SIP entity
associated with the IP Profile.
■ [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] parameter must be configured
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.
'Symmetric MKI'
enable-symmetric-mki
[IpProfile_
EnableSymmetricMKI]
Enables symmetric MKI negotiation.
■ [0] Disable = (Default) The device includes the MKI in
its SIP 200 OK response according to the
SRTPTxPacketMKISize parameter (if set to 0, it is not
included; if set to any other value, it is included with this
value).
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