AudioCodes Mediant 600 - Page 572

SIP User's Manual 572 Document #: LTRT-83310
Mediant 600 & Mediant 1000
Parameter Description

[1] = Enabled - the answer crypto line contains (or excludes) an
MKI value according to the selected crypto line in the offer. For
example, assume that the device receives an INVITE containing
the following two crypto lines in SDP:
a=crypto:2 AES_CM_128_HMAC_SHA1_80
inline:TAaxNnQt8/qLQMnDuG4vxYfWl6K7eBK/ufk04pR4|2^
31|1:1
a=crypto:3 AES_CM_128_HMAC_SHA1_80
inline:bnuYZnMxSfUiGitviWJZmzr7OF3AiRO0l5Vnh0kH|2^
31
The first crypto line includes the MKI parameter "1:1". In the 200
OK response, the device selects one of the crypto lines (i.e., '2' or
'3'). If it selects crypto line '2', it includes the MKI parameter in its
answer SDP, for example:
a=crypto:2 AES_CM_128_HMAC_SHA1_80
inline:R1VyA1xV/qwBjkEklu4kSJyl3wCtYeZLq1/QFuxw|2^
31|1:1
If the device selects a crypto line that does not contain the MKI
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: To enable symmetric MKI, the SRTPTxPacketMKISize
parameter must be set to any value other than 0.
Web/EMS: SRTP offered
Suites
[SRTPofferedSuites]
Defines the offered crypto suites (cipher encryption algorithms) for
SRTP.
 [0] = All available crypto suites (default)
 [1] CIPHER SUITES AES CM 128 HMAC SHA1 80 = device uses
AES-CM encryption with a 128-bit key and HMAC-SHA1 message
authentication with a 80-bit tag.
 [2] CIPHER SUITES AES CM 128 HMAC SHA1 32 = device uses
AES-CM encryption with a 128-bit key and HMAC-SHA1 message
authentication with a 32-bit tag.
Note: This parameter also affects the selection of the crypto in the
device's answer. For example, if the device receives an offer with two
crypto lines containing HMAC_SHA1_80 and HMAC_SHA_32, it uses
the HMAC_SHA_32 key in its SIP 200 OK response if the parameter
is set to 2.
Web: Disable Authentication
On Transmitted RTP
Packets
EMS: RTP
AuthenticationDisable Tx
[RTPAuthenticationDisable
Tx]
Enables authentication on transmitted RTP packets in a secured RTP
session.
 [0] Enable (default)
 [1] Disable
Web: Disable Encryption On
Transmitted RTP Packets
EMS: RTP
EncryptionDisable Tx
[RTPEncryptionDisableTx]
Enables encryption on transmitted RTP packets in a secured RTP
session.
 [0] Enable (default)
 [1] Disable
Web: Disable Encryption On
Transmitted RTCP Packets
EMS: RTCP
EncryptionDisable Tx
Enables encryption on transmitted RTCP packets in a secured RTP
session.
 [0] Enable (default)