The screen
The dark strip at the top is status, the way a desk phone carries one:- READY, INCOMING, ON A CALL — what the phone is doing.
- Two squares, 1 and 2 — your lines. Filled green is the line you are on, outlined green is a call waiting behind it, a dark square is free. Click one to switch; the other call holds.
- The codec in use and your extension number.
Dialling
Type into the number field and press Enter. The keypad works too, and sends DTMF once you are connected.Ctrl with a number opens the phone and starts dialling from anywhere in
the panel, without clicking into the field first. Mid-call the same chord
sends that digit as DTMF, and Ctrl+Enter dials what you have typed.
During a call
Under the keypad: Hold, Transfer, Conf and Park.- Hold — the caller waits on your line, hearing hold music.
- Transfer — send them to another extension.
- Conf — with two calls up this becomes Merge, and puts both parties and you in one room. With one call it dials somebody in.
- Park — puts the caller in a numbered slot and frees your line. Anyone can pick them up by dialling that slot, and parked calls are listed under the keypad with the number to dial.
The keys are dead until a call is up, and say so on hover. They act on the
call the switch says is yours, so a call on your desk phone is controllable
from here as well.
Two calls at once
A second call arriving while you are busy takes line 2 and rings. Answering it holds the first. The line squares switch between them, and Merge joins them.Merging mixes three people together, which is real work for the switch — so
on a very busy node Merge can come back with “this node has no capacity
to mix another conference right now”. Both of your calls are still
connected when that happens, and both people can still hear you: nothing is
moved until there is room for it. Wait a moment and press it again.
In a conference
Once your calls are merged, or you have joined a conference room, the phone panel shows In the room: everyone in it, who is talking, who is muted. You can Mute, Unmute or Kick each person, Lock the room so nobody else joins, and mute every participant at once. On the keypad inside a room:*1 mutes you, *2 unmutes you. If you joined
with a moderator PIN you also have *5 to lock or unlock, *7 to mute or
unmute everyone but the moderators, and *0 to end the room for everybody.
Settings
The gear button:- Microphone and Speaker — which devices to use, with a test for each.
- Ring on and Ring volume — which device rings, and how loudly.
- Preferred codec — what to ask for first. The extension’s codec profile on the server bounds what the switch will accept, so this chooses within it.
- Debug — shows the SIP log and connection details under the phone, and the app version. Recording never stops, so switching it on only decides whether you are looking at it.
Browsers do not play sound until you have interacted with the page. If a call
arrives before you have clicked anything, the phone says “incoming call —
click anywhere for sound” rather than ringing silently.