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Operational, Basic, and Advanced Parameters
A-102
41-001343-02 REV05 – 07.2014
Parameter
–
sip dtmf method
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Sets the Dual-tone multifrequency (DTMF) method to use on the IP phone.
Note:
See “
Out-of-Band DTMF and DTMF Method
” for DTMF behavior informa-
tion when this parameter is used in conjunction with the “sip out-of-band dtmf”
parameter.
Format
Boolean
Default Value
0 (RTP)
Range
0 (RTP)
1 (SIP INFO)
2 (BOTH)
Example
sip dtmf method: 1
Parameter
–
sip srtp mode
Configuration Files
aastra.cfg, <model>.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
Configuration Files
aastra.cfg, <model>.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