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Using SignalWire and Linphone Softphone for SIP

Linphone is an open-source voice/video over IP (VoIP) phone that makes it possible to communicate freely with people over the internet via voice. Linphone is unique in that it is supported on iOS, Android, MacOS, Windows, and GNU/Linux making it a fantastic choice for those in need of a softphone. Keep reading to get SignalWire and Linphone set up in minutes!

Configuring SignalWire and Linphone

The first step is to create a SIP Endpoint and point a SignalWire purchased number to that endpoint. When creating this endpoint, keep the default Encryption and default Codecs/Ciphers.

We will now use the details of the sip endpoint we created to connect to Linphone. If you haven't already downloaded Linphone, check out some getting started guides on their public Linphone wiki!

A screenshot of the Linphone interface.

Under the hamburger menu in the upper right click Preferences then Add Account.

A screenshot of the options menu, with the Preferences item selected.

Next, we will need to go through the following settings pages in order to specify the correct information. Make sure to disable Enable AVPF and Enable ICE or it will not work correctly.

SIP Address and SIP Server Address are created using the SIP domain generated after creating a SIP endpoint in the first step
  • SIP address:
  • SIP Server address: <;transport=tls>
A screenshot of a settings pane. Registration duration is set to 120, and Transport is set to TLS.
A screenshot with additional settings. AVPF regular RTCP interval is set to 1 second. Register and publish presence information are enabled.

If you get the error Unable to Authenticate. Please verify your password., enter your SIP endpoint password and click Login.

Entering the SIP endpoint password.

Sign Up Here

If you would like to test this example out, create a SignalWire account and Space.

Please feel free to reach out to us on our Community Slack or create a Support ticket if you need guidance!