Operational, Basic, and Advanced Parameters
A-112 41-001160-01, Rev 00, Release 2.3
IP Phone Administrator Guide
Parameter –
sip srtp mode
RTP Encryption
(in Web UI)
Aastra Web UI Advanced Settings->Global SIP->
RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
Description This parameter determines if SRTP is enabled on this IP phone, as
follows:
• If set to 0, then disable SRTP.
• If set to 1 then SRTP calls are preferred.
• If set to 2, then SRTP calls only are generated/accepted.
Format Integer
Default Value 0 (SRTP Disabled)
Range 0 (SRTP Disabled)
1 (SRTP Preferred)
2 (SRTP Only)
Example sip srtp mode: 1
Parameter –
sip silence suppression
Silence Suppression
(in Web UI)
Aastra Web UI Advanced Settings->Global SIP->RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
Description Silence suppression is enabled by default on the IP phones. The phone
negotiates whether or not to use silence suppression. Disabling this
feature forces the phone to ignore any negotiated value.
Format Boolean
Default Value 1 (enabled)
Range 0 (disabled)
1 (enabled)
Example sip silence suppression: 0
