Yealink SIP-T46G Administrator's Manual page 212

Administrator's Guide for SIP-T46G IP Phone
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=sendrecv
The callee receives the INVITE message with the RTP encryption algorithm. The callee
answers the call and responses with a 200 OK message carrying the negotiated RTP
encryption algorithm.
The example of the RTP encryption algorithm carried in the SDP of the 200 OK
message for reference:
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
You can configure the SRTP feature on a per-account basis. When SRTP is enabled on
both IP phones, the RTP streams will be encrypted, and a lock icon appears on the
LCD screen of each IP phone after the successful negotiation.
Note
If you enable SRTP , then you should also enable TLS. This ensures the security of SRTP
encryption. For more information on TLS, refer to
Procedure
SRTP can be configured using the configuration files or locally.
Configuration File
Local
200
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Transport Layer Security
<MAC>.cfg
Web User Interface
on page
Configure the SRTP feature on a
per-account basis.
For more information, refer to
SRTP on page 342.
Configure the SRTP feature on a
per-account basis.
Navigate to:
http://<phoneIPAddress>/servlet
?p=account-adv&q=load&acc=
0
193 .