Aastra SIP 53I Administrator's Manual page 582

IP Phone Administrator Guide
Operational, Basic, and Advanced Parameters
Parameter –
sip silence suppression
Silence Suppression
(in Web UI)
Description
Format
Default Value
Range
Example
Per-Line Settings
Parameter –
sip lineN dtmf method
DTMF Method
(in Web UI)
Description
Format
Default Value
Range
Example
A-80
Aastra Web UI Advanced Settings->Global SIP->RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
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.
Boolean
1 (enabled)
0 (disabled)
1 (enabled)
sip silence suppression: 0
Aastra Web UI Advanced Settings->Global SIP->RTP Settings
Configuration Files aastra.cfg, <mac>.cfg
Sets the Dual-tone multifrequency (DTMF) method to use on the IP
phone for a specific line.
Integer
0 (RTP)
0 (RTP)
1 (SIP INFO)
2 (BOTH)
sip line1 dtmf method: 1
41-001160-00, Release 2.1, Rev 04