Yealink VC Series Administrator's Guide

Administrator‘s Guide for Yealink Video Conferencing Systems
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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 system is described below:
Parameter
Description
Configuration Method
SRTP
Specifies the SRTP type for the SIP
account.
 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
Rules of SRTP for media encryption in SIP calls:
Far Near
Compulsory
Enabled
Disabled
Compulsory
SRTP Call
SRTP Call
Fail to establish call
Enabled
SRTP Call
SRTP Call
RTP Call
Disabled
Fail to establish call
RTP Call
RTP Call

Yealink VC Series Specifications

General

Brand	Yealink
Model	VC Series
Category	Conference System
Language	English