Aastra Telecom 480I CT manual Blind Transfer Setting, Parameter Configuration Files

Parameter –	Aastra Web UI:		Advanced Settings->Global SIP->
sip send line			Advanced SIP Settings
Send Line Number in	Configuration Files		aastra.cfg, <mac>.cfg
REGISTER Message
(in Web UI)
Description	Adds an "Aastra-Line:" header to the SIP REGISTER messages sent
	from the phone to the call server, where the value is the MAC address of
	the phone.
Format	Boolean
Default Value	0	(disabled)
Range	0	(disabled)
	1	(enabled)
Example	sip send line: 1

Blind Transfer Setting.

Parameter –	Configuration Files		aastra.cfg, <mac>.cfg
sip cancel after blind transfer
Description	Forces the phone to use the Blind Transfer method available in software
	prior to release 1.4. This method sends the CANCEL message after the
	REFER message when blind transferring a call.
Format	Boolean
Default Value	0	(disabled)
Range	0	(disabled)
	1	(enabled)
Example	sip cancel after blind transfer: 1