Identity → Login(Tab)
<conferencing idx="INDEX" perm="PERMISSIONFLAG">VALIDVALUE</conferencing>
Contains a sip-uri for a conference room. Used by pressing the conference key. This setting depends on an identity. If 'conference' key was pressed the configured conference room of the active identity will be called. If no SIP-URI is configured the default behaviour is a local conference on the phone (min. 2 participants connected).
SIP-URI, with or without "sip:".