Aastra Telecom 41-001343-02 manual Parameter

		Operational, Basic, and Advanced Parameters
Parameter –	Configuration Files
sip dtmf method	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 on page 4-79” 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 –	Configuration Files
sip srtp mode	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 –	Configuration Files
sip silence suppression	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

41-001343-02 REV04 – 05.2014 A-102