A live Call in the Edesy SDK has four controls: toggleMute() mutes or unmutes the microphone, toggleHold() holds or resumes the call, sendDigit(d) sends a DTMF keypad digit (for example to navigate an IVR menu), and hangup() ends the call. The mute, hold and dtmf events tell your UI when state changes.

Controls#

Method	What it does	Event
`call.toggleMute()`	Mutes the microphone, or unmutes it if muted	`mute`
`call.toggleHold()`	Puts the call on hold, or resumes it if held	`hold`
`call.isHeld`	`true` while the call is on hold	-
`call.sendDigit(d)`	Sends one DTMF digit: `0`-`9`, `*` or `#`	`dtmf`
`call.hangup()`	Ends the call	`ended`

Example: call controls#

muteBtn.onclick = () => call.toggleMute();
holdBtn.onclick = () => call.toggleHold();
hangupBtn.onclick = () => call.hangup();

call.on("mute", (muted) => (muteBtn.textContent = muted ? "Unmute" : "Mute"));
call.on("hold", (held) => (holdBtn.textContent = held ? "Resume" : "Hold"));

// On-screen keypad
for (const key of "123456789*0#") {
  const b = document.createElement("button");
  b.textContent = key;
  b.onclick = () => call.sendDigit(key);
  keypad.appendChild(b);
}

How to build the controls#

Show the controls after answered.
Wire the buttons to toggleMute(), toggleHold(), sendDigit() and hangup().
Update labels from the mute and hold events rather than tracking state yourself.
Hide the controls on ended or failed.

FAQ#

Does mute stop the other person hearing me?#

Yes. Mute stops sending audio from the microphone. You still hear the other side.

What does the other person hear on hold?#

The call is held until you resume it with toggleHold() again.

Call call.sendDigit("1") while the call is answered. Send one digit per call to sendDigit().

Can I send several digits at once?#

Call sendDigit() once per digit. Leave a short pause between digits if the far end misses any.

How do I know whether the call is on hold?#

Read call.isHeld, or listen for the hold event.

Does the drop-in dialer support DTMF?#

Yes. Its keypad sends digits with sendDigit() while a call is active.

Mute, Hold and DTMF