Yealink SIP-T48G Administrator's Manual page 518

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
Procedure
SRTP can be configured using the configuration files or locally.
Configuration File
Local
Details of the Configuration Parameter:
Parameters
account.X.srtp_encryption
Description:
Configures whether to use voice encryption service for account X.
0-Disabled
1-Optional
2-Compulsory
If it is set to 1 (Optional), the IP phone will negotiate with the other IP phone what
type of encryption to utilize for the session.
If it is set to 2 (Compulsory), the IP phone is forced to use SRTP during a call.
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G).
X ranges from 1 to 12 (for SIP-T42G).
X ranges from 1 to 6 (for SIP-T41P/T27P).
X ranges from 1 to 3 (for SIP-T23P/G).
X ranges from 1 to 2 (for SIP-T21(P) E2).
Web User Interface:
Account->Advanced->RTP Encryption (SRTP)
Phone User Interface:
None
504
<MAC>.cfg
Web User Interface
Permitted Values
0, 1 or 2
Configure SRTP feature on a
per-line basis.
Parameter:
account.X.srtp_encryption
Configure SRTP feature on a
per-line basis.
Navigate to:
http://<phoneIPAddress>/servl
et?p=account-adv&q=load&ac
c=0
Default
0