Yealink VC880 - Page 208

| Configuring the Security Features | 208
m=audio 11780 RTP/SAVP 0 8 18 9 101
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:NzFlNTUwZDk2OGVlOTc3YzNkYTkwZWVkMTM1YWFj
a=crypto:2 AES_CM_128_HMAC_SHA1_32
inline:NzkyM2FjNzQ2ZDgxYjg0MzQwMGVmMGUxMzdmNWFm
a=crypto:3 F8_128_HMAC_SHA1_80 inline:NDliMWIzZGE1ZTAwZjA5ZGFhNjQ5YmEANTMzYzA0
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
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
replying the 200 OK message which carries the negotiated RTP encryption algorithm.
Example of the 200 message carried with the RTP encryption algorithm in the SDP is described as below:
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
Note:
If you enable SRTP and you can also enable TLS, which can ensure the security of SRTP encryption.
For more information about TLS, refer to TLS Transport Protocol .
• Configuring SRTP
Configuring SRTP
You can set SRTP for the SIP protocol when using a SIP account, SIP IP call, or logging in to Zoom, Pexip,
BlueJeans, EasyMeet, or a custom third-party platform.
Procedure
1. Do one of the following:
• On your web user interface, go to Account > VC Platform > Video Conference Platform >
Platform Type > Zoom/Pexip/BlueJeans/EasyMeet/Custom.
• On your web user interface, go to Account > SIP Account/SIP IP Call > SRTP.