AudioCodes Mediant 4000 SBC User Manual page 842

Parameter
Symmetric MKI Negotiation
configure voip > media
security > symmetric-mki
[EnableSymmetricMKI]
Offered SRTP Cipher Suites
configure voip > media
security > offer-srtp-cipher
[SRTPofferedSuites]
configure voip > sbc settings
> sbc-dtls-mtu
[SbcDtlsMtu]
Disable Authentication On
Transmitted RTP Packets
configure voip > media
security > RTP-
authentication-disable-tx
[RTPAuthenticationDisableTx]
Disable Encryption On
Transmitted RTP Packets
configure voip > media
security > RTP-encryption-
disable-tx
[RTPEncryptionDisableTx]
Disable Encryption On
Transmitted RTCP Packets
configure voip > media
security > RTCP-encryption-
disable-tx
[RTCPEncryptionDisableTx]
configure voip > sip-definition
User's Manual
the IP Profile.
Global parameter that enables symmetric MKI negotiation. You can
also configure this functionality per specific calls, using IP Profiles
(IpProfile_EnableSymmetricMKI). For a detailed description of the
parameter and for configuring this functionality in the IP Profiles
table, see ''Configuring IP Profiles'' on page 418.
Note: If this functionality is configured for a specific IP Profile, the
settings of this global parameter is ignored for calls associated with
the IP Profile.
Defines the offered crypto suites (cipher encryption algorithms) for
SRTP.

[0] All = (Default) All available crypto suites.

[1] 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] 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: The 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.
Defines the maximum transmission unit (MTU) size for the DTLS
handshake. The device does not attempt to send handshake packets
that are larger than the configured value. Adjusting the MTU is useful
when there are network constraints on the size of packets that can be
sent.
The valid value range is 228 to 1500. The default is 1500.
Enables authentication on transmitted RTP packets in a secured RTP
session.

[0] Enable (default)

[1] Disable
Enables encryption on transmitted RTP packets in a secured RTP
session.

[0] Enable (default)

[1] Disable
Enables encryption on transmitted RTCP packets in a secured RTP
session.

[0] Enable (default)

[1] Disable
Global parameter that enables synchronization of the SRTP state
842
Mediant 4000 SBC
Description
Document #: LTRT-40203