Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
862
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.
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
SRTP is configurable on a per-line basis. When SRTP is enabled on both IP phones, RTP
streams will be encrypted, and a lock icon appears on the LCD screen of each IP phone
after successful negotiation.
Note
Procedure
SRTP can be configured using the configuration files or locally.
Configuration File
<MAC>.cfg
Configure SRTP feature on a
per-line basis.
Parameter:
account.X.srtp_encryption
Configure SRTP feature for IP
call.
Parameter:
account.17.srtp_encryption
Local
Web User Interface
Configure SRTP feature on a
per-line basis.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/T40P/
T29G/T27P/T23P/T23G/T21(P)
E2/T19(P) E2/CP860:
http://<phoneIPAddress>/servl
If you enable SRTP, then you should also enable TLS. This ensures the security of SRTP
encryption. For more information on TLS, refer to
Summary of Contents for CD860
Page 1: ......
Page 45: ...Getting Started 23 For SIP T42G T41P T40P Desk Mount Method Wall Mount Method Optional ...
Page 47: ...Getting Started 25 For SIP T23P T23G Desk Mount Method Wall Mount Method Optional ...
Page 122: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series CP860 IP Phones 100 ...
Page 840: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series CP860 IP Phones 818 ...
Page 995: ...Appendix 973 ...