Support / Voice / PBX

Open-source PBX trunk configuration.

Most SIP-PBX trunk wizards collect the same fields from the operator and write them into the underlying engine. The values are the same across vendors; the wizard layout is what changes.

Sign up SIP trunking overview

Common trunk fields

  • Trunk name: a label like VoiceTel
  • SIP server / Registrar: the SIP server host shown in your customer portal from your onboarding email
  • Outbound proxy: same as SIP server
  • Username / Auth user: SIP username from VoiceTel onboarding
  • Password / Secret: SIP password from onboarding
  • From domain: the SIP server host shown in your customer portal
  • Transport: UDP
  • Authentication: Digest (most common) or IP authentication
  • Register interval: 360 seconds
  • Qualify / OPTIONS ping: 30 seconds
  • Codecs: ulaw (G.711µ), alaw (G.711a), g729
  • DTMF: RFC 4733 / RFC 2833 (in-RTP)

Platforms

  • FreePBX

    Sangoma FreePBX / PBXact. Most common SOHO open-source PBX.

  • FusionPBX

    FreeSWITCH-based multi-tenant PBX with web admin.

  • 3CX

    Commercial SIP PBX with a SIP trunk wizard for many providers.

  • Asterisk (raw)

    For raw pjsip.conf configuration without a GUI, see the Asterisk SBC guide.