Tele

Tele Doorbell — Ft videotelephony and desktop sharing in a DS context with abstraction over the backend provider which defaults to Jitsi.
Concise story of the sameboat 'doorbell', a redvant applet ∫ ∂ MCS / ∂ DCP DS.

doorbell metaphor: ringer controls and tracks video conference call states

Ordinal	Color	State	Visibility	Enabled
5	Black	DOWN/OFFHOOK/REJECT   Agents start in this state, may move to it by personal selection or involuntarily due to network events, or a failure to transition to ATTENTION, the next state goal. Double clicking in response to incoming call rejects the call and the subscribers ringer is briefly in this state to acknowledge the drop. Subscriber double clicking when there's no call toggles offhook. Double clicking during a call disconnects it and while that is being confirmed, the control is this color before returning to ATTENTION.	Both	No
-1	White	OFFLINE   No subscriber context or caller device rejected.	Caller	No
0	Cyan	ATTENTION   Ordinary ringer state, like a backlit doorbell, ready to accept or originate call. Blinking indicates ring (slow) or busy (rapid). Single click rings (caller) or answers (subscriber) moving to IN CALL.	Both	Yes
1	Blue	LOOKUP/PAGE   Agent has initiated a call, or lookup of a remote subscriber or group which may be defaulted from context. If none is, the user is prompted for the user lookup text. Submits the subscriber lookup text if any. If the lookup finds an active call, the join processing for this Agent and call begin, otherwise the subscriber call is initiated.	Both	Yes
2	Yellow	BUFF/WAIT   Indicates incoming events for the agent. The control is inhibited if it is solidly this color .	Both	If blinking
3	Green	IN CALL   Call active, blinks when additional callers join the call.	Both	Yes
4	Red	AFK/ASIDE/BUSY   A subscriber controlled state which blocks ATTENTION requests. Click toggles, blinks while block active.	Subscriber	Yes

On authenticated devices, FSA attempts connection to DCMS>, subscriber dial/lookup/passphrase multiselect and Aux 2 state shows. In the wild a simple Ringer shows and is grayed.
In a SSO session, the flat doorbell is replaced by 3 1A2 keys.