Table 91: SRTP properties
Parameter AES_CM_128_HMAC_S
HA1_80
AES_CM_128_HMAC_SHA1_32
Master key length 128 bits 128 bits
Master salt length 112 bits 112 bits
SRTP lifetime 2^48 packets 2^48 packets
SRTCP lifetime 2^31 packets 2^31 packets
Cipher AES Counter Mode AES Counter Mode
Encryption key 128 bits 128 bits
MAC HMAC-SHA1 HMAC-SHA1
SRTP auth. tag 80 bits 32 bits
SRTCP auth. tag 80 bits 80 bits
SRTP auth. key len. 160 bits 160 bits
SRTCP auth. key
len.
160 bits 160 bits
Call security is identified by the presence of the security icon present during an active call, as shown
in the following example.
The presence of the security icon is the only visible indication that the media path is encrypted. The
presence of this icon depends on whether the IP Deskphone has been configured to support SRTP
or not and is visible when the IP Deskphone is not in the idle screen.
Available SRTP configurations are provided in the following table.
SRTP
March 2015 SIP Software for Avaya 1200 Series IP Deskphones-Administration 295
Comments? infodev@avaya.com
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