AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 829)

A-98 41-001343-01 Rev 03, Release 3.2.2
SIP Join Feature for 3-Way Conference
Parameter –
sip join support Configuration Files aastra.cfg, <model>.cfg, <mac>.cfg
Description Enables or disables the phone to allow a conference to be set up with a
join header as described in RFC 3911.
Format Boolean
Default Value 0 (disabled)
Range 0 (disabled)
1 (enabled)
Example sip join support: 1