Aastra Telecom 41-001343-02 manual SIP Outbound Support, Contact Header Matching, Transport

		Operational, Basic, and Advanced Parameters
SIP Outbound Support
Parameter –	Configuration Files
sip outbound support	aastra.cfg, <model>.cfg, <mac>.cfg
Description	Enables and disables whether or not the phone uses Draft 15 (draft-ietf-sip-outbound-
	15) support for SIP outbound packets.
	A SIP User Agent (UA) behind a firewall, reuses an existing connection (usually the REG-
	ISTER outbound connection) for the inbound request if the proxy supports it. The UA
	uses keep-alive packets to monitor the connection status.
	Notes:
	•	If the Global SIP parameter “Persistent TLS” is set on the phone, then only one TLS per-
		sistent connection can be established since the phone uses the local port 5061 for
		connection. If the Global SIP parameter “TLS” is set on the phone, more than one con-
		nection can be setup since the phone uses a random local port for connection.
	•	This parameter must be enabled for this feature to start keep-alive for a particular
		transport.
Format	Boolean
Default Value	0
Range	0 (disabled)
	1 (enabled)
Example	sip outbound support: 1

Contact Header Matching

Parameter –	Configuration Files
sip contact matching	aastra.cfg, <model>.cfg, <mac>.cfg
Description	Specifies the method for which the phone uses to match the Contact header in a SIP
	registration packet.
Format	Integer
Default Value	2 (matching username only)
Range	0(default) URI matching of username, domain name, phone IP and
	port, and transport
	1matching of phone IP only
	2matching of username only
	3matching of phone IP and username only
Example	sip contact matching: 1

41-001343-02 REV04 – 05.2014 A-60