Administrator‘s Guide for Yealink VC110 Video Conferencing Endpoint
216
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
IP call separately.
Disabled—do not use SRTP
in SIP calls.
Optional—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
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