A monitored station can have two call states and two ringing states. The call states and ringing states are displayed separately on the monitoring station:
The call states are:
IDLE – All primary call appearances are in an idle state.
BUSY – One or more call appearance have a state which is different to idle.
Note:
A ringing station is considered as a station with the idle overall call state.
The busy states are as follows:
Off-hook
Dialing
Calling
Active
Hold
Soft hold (used for conference and transfer steps)
The overall ringing states are as follows:
IDLE – No incoming call appearance is ringing
RINGING – One incoming call appearance is ringing, silent ringing or audible ringing
DOUBLE RINGING – More than one incoming call appearance is ringing, silent ringing or audible ringing.
