EXTENSION

Call

extension Call

public func iceRestart(completion: @escaping (_ success: Bool, _ error: Error?) -> Void)

Performs ICE restart to renegotiate ICE candidates when network conditions change This helps resolve audio delay issues by establishing new network paths

• Parameter completion: Callback indicating success or failure of the ICE restart

Name	Description
completion	Callback indicating success or failure of the ICE restart

public func hangup()

Hangup or reject an incoming call.

call.hangup()

public func answer(customHeaders:[String:String] = [:], debug:Bool = false)

Starts the process to answer the incoming call.

Use this method to accept an incoming call and establish the WebRTC connection.

// Basic answer
call.answer()

// Answer with custom headers
call.answer(customHeaders: ["X-Custom-Header": "Value"])

// Answer with debug mode
call.answer(debug: true)

• Parameters:
  • customHeaders: (optional) Custom Headers to be passed over webRTC Messages. Headers should be in the format X-key:Value where X- prefix is required for custom headers.
  • debug: (optional) Enable debug mode for call quality metrics and WebRTC statistics. When enabled, real-time call quality metrics will be available through the onCallQualityChange callback.

Name	Description
customHeaders	(optional) Custom Headers to be passed over webRTC Messages. Headers should be in the format X-key:Value where X- prefix is required for custom headers.
debug	(optional) Enable debug mode for call quality metrics and WebRTC statistics. When enabled, real-time call quality metrics will be available through the onCallQualityChange callback.

public func dtmf(dtmf: String)

Sends a DTMF (Dual-Tone Multi-Frequency) signal during an active call. DTMF signals are used to send digits and symbols over a phone line, typically for interacting with automated systems, voicemail, or IVR menus.

• Parameter dtmf: A string containing a single DTMF character. Valid characters are:
  • Digits: 0-9
  • Special characters: * (asterisk), # (pound)
  • Letters: A-D (less commonly used)

// Navigate an IVR menu
currentCall?.dtmf("1")    // Select option 1
currentCall?.dtmf("0")    // Select option 0

// Special characters
currentCall?.dtmf("*")    // Send asterisk
currentCall?.dtmf("#")    // Send pound/hash

Note: The call must be in ACTIVE state for DTMF signals to be sent successfully. Each DTMF tone should be sent individually with appropriate timing between tones when sending multiple digits.

Name	Description
dtmf	A string containing a single DTMF character. Valid characters are:

public func muteAudio()

Turns off audio output, i.e. makes it so other call participants cannot hear your audio.

call.muteAudio()

public func unmuteAudio()

Turns on audio output, i.e. makes it so other call participants can hear your audio.

call.unmuteAudio()

public func resetAudioDevice()

Resets the audio device and clears accumulated buffers to resolve persistent audio delay issues.

This method addresses iOS audio delay problems where:

• AudioDeviceModule buffers stretch under poor network conditions
• WebRTC audio pacing causes frame accumulation
• iOS AudioUnit/AVAudioSession remains in large buffer state

call.resetAudioDevice()

public func hold()

Holds the call.

call.hold()

public func unhold()

Removes hold from the call.

call.unhold()

public func toggleHold()

Toggles between active and held state of the call.

call.toggleHold()