Frequently Asked Questions

Short answers to the questions we hear most. Still stuck? The relevant section above almost always has the detail.

What exactly is VoicerOnePBX?

A complete business phone system that runs as a single application on a Mac. It does everything a traditional office phone system does — extensions, trunks to the outside world, menus, queues, voicemail, fax — without a separate server or a monthly cloud fee.

What do I need to run it?

A Mac left running (ideally on a wired network with a fixed address), one or more phone-service provider accounts for outside calls (SIP or IAX2), and your phones. That's the core of it — see Installation.

Which phones work with it?

Standards-based SIP phones from Yealink, Polycom/Poly, Grandstream and Cisco are supported with automatic provisioning, along with any standard SIP softphone and the built-in browser softphone. See Adding Endpoint Devices.

Which phone providers can I use?

Any standards-based SIP provider, and IAX2 providers such as voip.ms. You can run several trunks at once and route calls between them. See Creating Trunks.

How many calls can it handle at once?

It's been load-tested to 300 concurrent calls (600 call legs) on a single Mac, with a one-hour endurance soak, comfortably beyond the needs of a typical small or mid-size office.

Can it really send and receive faxes?

Yes — natively, over the T.38 internet-fax standard. Upload a PDF to send, receive faxes as PDFs, or connect a physical fax machine through an analog adapter. See Fax Center.

Does my call data leave my Mac?

Your recordings, voicemail and transcriptions stay on your Mac — transcription and AI summaries run on-device, not in a cloud. Calls themselves travel to your provider like any phone call. Privacy-conscious environments (clinics, law offices) are a core use case.

Can I connect it to my own software?

Absolutely — that's what the Developers section is for: webhooks, programmable voice, and REST APIs to send and receive messages.

How do I back it up?

Export your whole configuration to a single file from Settings, and restore it later. See Settings → Backup & Restore.