Browser Phone

VoiceCenter includes a built-in browser softphone powered by SIP.js. It runs directly in your browser with no software installation required. This page covers setup, the dial pad interface, and all available call controls.

Requirements

Before using the browser phone, ensure you have:

Getting Started

1. Allow microphone access

   The first time you use the browser phone, your browser asks for microphone permission. Click Allow. If you previously denied it, go to your browser's site settings and enable microphone access for VoiceCenter.

2. Open the softphone

   Click the floating dial pad button in the bottom-right corner of any page. The softphone panel opens.

3. Check the connection indicator

   The softphone shows a connection status indicator:

   • Green -- Connected and ready for calls
   • Yellow -- Connecting or reconnecting
   • Red -- Disconnected. Try refreshing the page.

4. Make or receive calls

   Use the keypad to dial a number, or wait for incoming calls to ring.

The Dial Pad

The dial pad provides a standard telephone keypad layout:

• Number keys (0-9) -- Enter the destination number
• Star (*) and hash (#) -- For DTMF tones during calls
• Backspace -- Delete the last digit
• Call button (green) -- Start the call
• End button (red) -- Hang up an active call

You can also type numbers directly with your keyboard instead of clicking the on-screen buttons.

Call Controls

During an active call, the following controls are available:

Mute

Toggles your microphone on and off. When muted, the other party cannot hear you but you can still hear them. The mute button shows a visual indicator when active.

Hold

Places the call on hold. The other party hears hold music (if configured). You can take the call off hold at any time by clicking the hold button again.

Transfer

Transfers the active call to another destination.

Blind transfer -- The call is immediately sent to the target number or extension. You are disconnected as soon as the transfer initiates.

Attended transfer -- You call the target first, speak with them, and then complete the transfer. Both parties are connected and you are removed from the call.

1. Click the Transfer button

   During an active call, click the Transfer button.

2. Enter the destination

   Type the extension number or external phone number to transfer to.

3. Choose transfer type

   Select Blind Transfer to send immediately, or Attended Transfer to speak with the recipient first.

DTMF Keypad

Opens the numeric keypad during a call for sending DTMF tones. Use this when navigating automated phone menus (IVR) on the far end.

Audio Settings

• Use a USB headset for the best experience. Built-in laptop microphones often cause echo.
• Close other applications that use the microphone (video conferencing, music) before starting calls.
• If you experience one-way audio, check that your firewall allows WebRTC UDP traffic.

Troubleshooting