This reflects the call state in the internal state machine. Here is an extract of the most usual values:
1_IOPENING: an incoming call
1_IDOPENING: a distant incoming call (if you see distant call as local incoming call)
1_IACCEPTING: accepting a call
1_OPREPARING: preparing an outgoing call (the sip request is not sent yet)
1_OOPENING: opening an outgoing call (sip request sent)
1_ORINGING: outgoing call launched, the remote party is ringing
2_OPENED: call is established
2_HOLDING: call is currently put on hold (sip reinvite on progress)
2_HELD: call is on hold
2_THOLDING: call is currently put on hold (sip reinvite on progress). The hold purpose is a Transfer
2_THELD: call is on hold for a Transfer
2_DHOLDING: call is currently put on hold (sip reinvite on progress). The hold purpose is a Dispatch
2_DHELD: call is on hold for a Dispatch
2_DHOLDING: call is currently put on hold (sip reinvite on progress). The hold purpose is a Dispatch
2_DHELD: call is on hold for a Dispatch
2_CHOLDING: call is currently put on hold (sip reinvite on progress). The hold purpose is a Conference
2_CHELD: call is on hold for a Conference
5_CONFERENCE: when making a conference, the turret creates a fake 5_CONFERENCE call object that represents the whole conference.
6_CONFERENCING: The 5_CONFERENCE call is linked to several 6_CONFERENCING call objects. These calls are the real calls that are included in the conference (and thus they are the original participant calls that have just been switch to 6_CONFERENCING state). In ad-hoc mode, there is only one of such calls as the conference is hosted on the PBX.
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