AudioCodes Mediant 500 MSBR, Руководство пользователя

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Version 7.2 409 Mediant 500 MSBR
User's Manual 23. Coders and Profiles
Parameter Description
through a re-INVITE, the device or server generates a new
key and the device resets the ROC index (and other SRTP
fields) as done by the server, resulting in a synchronized
SRTP.
Note:

If this feature is disabled and the server resets the ROC upon
a re-key generation, one-way voice may occur.

The corresponding global parameter is
ResetSRTPStateUponRekey.
Generate SRTP Keys Mode
generate-srtp-keys
[IpProfile_GenerateSRTPKeys]
Enables the device to generate a new SRTP key upon receipt of
a re-INVITE with the SIP entity associated with the IP Profile.

[0] Only If Required= (Default) The device generates an
SRTP key only if necessary.

[1] Always = The device always generates a new SRTP key.
SBC Remove Crypto Lifetime in
SDP
sbc-sdp-remove-crypto-lifetime
[IpProfile_SBCRemoveCryptoLife
timeInSDP]
Defines the handling of the lifetime field in the 'a=crypto' attribute
of the SDP for the SIP entity associated with the IP Profile. The
SDP field defines the lifetime of the master key as measured in
maximum number of SRTP or SRTCP packets using the master
key.

[0] No = (Default) The device retains the lifetime field (if
present) in the SDP.

[1] Yes = The device removes the lifetime field from the
'a=crypto' attribute.
Note: If you configure the parameter to Yes, the following IP
Profile parameters must be configured as follows:

IpProfile_EnableSymmetricMKI configured to Enable [1].

IpProfile_MKISize configured to 0.

IpProfile_SBCEnforceMKISize configured to Enforce [1].
SBC Early Media
Remote Early Media
sbc-rmt-early-media-supp
[IpProfile_SBCRemoteEarlyMedi
aSupport]
Defines whether the remote side can accept early media or not.

[0] Not Supported = Early media is not supported.

[1] Supported = (Default) Early media is supported.
Remote Multiple 18x
sbc-rmt-mltple-18x-supp
[IpProfile_SBCRemoteMultiple18
xSupport]
Defines whether multiple 18x responses including 180 Ringing,
181 Call is Being Forwarded, 182 Call Queued, and 183 Session
Progress are forwarded to the caller, for the SIP entity
associated with the IP Profile.

[0] Not Supported = Only the first 18x response is forwarded
to the caller.

[1] Supported = (Default) Multiple 18x responses are
forwarded to the caller.
Remote Early Media Response
Type
sbc-rmt-early-media-resp
[IpProfile_SBCRemoteEarlyMedi
aResponseType]
Defines the SIP provisional response type - 180 or 183 - for
forwarding early media to the caller, for the SIP entity associated
with the IP Profile.

[0] Transparent = (Default) All early media response types are
supported; the device forwards all responses as is
(unchanged).

[1] 180 = Early media is sent as 180 response only.