AudioCodes Mediant 3000

User's Manual 396 Document #: LTRT-89730
Mediant 3000
Parameter Description
parameter, then the MKI parameter is not included in the crypto
line in the SDP answer (even if the SRTPTxPacketMKISize
parameter is set to any value other than 0).
Note: The corresponding global parameter is
EnableSymmetricMKI.
MKI Size
[IpProfile_MKISize]
Defines the size (in bytes) of the Master Key Identifier (MKI) in
SRTP Tx packets.
The valid value is 0 to 4. The default is 0 (i.e., new keys are
generated without MKI).
Notes:
 Gateway application: The device only initiates the MKI size.
 SBC application: The device can forward MKI size as is for
SRTP-to-SRTP flows or override the MKI size during
negotiation. This can be done on the inbound or outbound leg.
 The corresponding global parameter is SRTPTxPacketMKISize.
Reset SRTP Upon Re-key
[IpProfile_ResetSRTPStateUpo
nRekey]
Enables synchronization of the SRTP state between the device and
a server when a new SRTP key is generated upon a SIP session
expire. This feature ensures that the roll-over counter (ROC), one
of the parameters used in the SRTP encryption/decryption process
of the SRTP packets is synchronized on both sides for transmit and
receive packets.
 [0] Disable = (Default) ROC is not reset on the device side.
 [1] Enable = If the session expires causing a session refresh
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.
Notes:
 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
[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.
AMD Sensitivity Parameter
Suite
[IpProfile_AMDSensitivityParam
eterSuit]
Defines the AMD Parameter Suite to use for the Answering
Machine Detection (AMD) feature.
 [0] 0 = (Default) Parameter Suite 0 based on North American
English with standard detection sensitivity resolution (8
sensitivity levels, from 0 to 7). This AMD Parameter Suite is
provided by the AMD Sensitivity file, which is shipped pre-
installed on the device.
 [1] 1 = Parameter Suite based 1 on North American English with
high detection sensitivity resolution (16 sensitivity levels, from 0
to 15). This AMD Parameter Suite is provided by the AMD
Sensitivity file, which is shipped pre-installed on the device.
 [2] 2 to [7]7 = Optional Parameter Suites that you can create
based on any language (16 sensitivity levels, from 0 to 15). This
requires a customized AMD Sensitivity file that needs to be
installed on the device. For more information, contact your