Yealink VC110 - Page 196

Administrator‘s Guide for Yealink VC110 Video Conferencing Endpoint
186
a=rtpmap:9 G722/8000
a=fmtp:101 0-15
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=sendrecv
The callee receives the INVITE message with the RTP encryption algorithm, and then
answers the call by responding with a 200 OK message which carries the negotiated
RTP encryption algorithm.
The following is an example of the RTP encryption algorithm carried in the SDP of the
200 OK message:
m=audio 11780 RTP/SAVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:NGY4OGViMDYzZjQzYTNiOTNkOWRiYzRlMjM0Yzcz
a=sendrecv
a=ptime:20
a=fmtp:101 0-15
The SRTP parameter on the endpoint is described below:
Parameter
Description
Configuration Method
SRTP
Specifies the SRTP type. You can
specify it to the SIP account or SIP
direct account separately.
 Disabled—do not use SRTP
in SIP calls.
 Enabled—negotiate with the
far site whether to use SRTP
for media encryption in SIP
calls.
 Compulsory—compulsory
use SRTP for media
encryption in SIP calls.
Default: Disabled
Web User Interface