Tele

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Call Model DS Ft abstracts a backend provider, natively Jitsi.
Concise story of domain space en:smart doorbell.

OrdinalColorStateVisibilityEnabled
doorbell metaphor: button controls and tracks video conference call states
-1White
  OFFLINE  

No subscriber context or caller device rejected.

CallerNo
0 Cyan
  ATTENTION  

Subscriber on hook state, like a backlit doorbell, ready to join or originate a call. Double click toggles offhook and single moves to LOOKUP/PAGE.

SubscriberYes
1 Blue
  LOOKUP/PAGE  

If no user or group callee is implicit, clicking prompts for the subscriber or group lookup text, which is then looked up. If the lookup finds an active call, the join processing for this Agent and call begin. If there is an implicit callee, they are rung up. If ring up attempt fails, returns to ATTENTION otherwise moves to IN CALL. Default on hook state for an non-subscribing caller.

BothYes
2 Yellow
  INCOMING  

Indicates incoming events for the agent. Blinks until callee dispatches state. Single click moves the call to a holding state. While in the holding state information on the call is presented to the callee which can include a live feed of the caller. Another single click by callee connects the call. At any time a double click drops the call.

Subscr.Yes
3 Green
  IN CALL  

Call active, blinks when additional callers join the call. Single click moves to BUSY. Double click ends call.

BothYes
4Red
  AFK/ASIDE/BUSY  

A subscriber controlled state indicating the user is in a dialog or momentarily off camera. Entered by swipe down, exited by swipe up, blinks while block active for subscriber solid for other callers.

BothYes
5Black
  DOWN/OFFHOOK/REJECT  

Agents may be Callers or Subscribers, both can initiate calls but only a Subscriber can receive them, owns a doorbell. Both start in this state and may enter it only as a result of network events. Clicking if enabled moves to ATTENTION or OFFLINE depending on entering state and network.

BothSubscr.