Desk phones, a browser phone and an Android app ring together. Queues and a contact center, team chat, video, business texting and software fax live behind the same login, the same bill and the same support team. Change a call flow and it is live in seconds.
One system. All of this behind one login.
Stop stitching together a phone vendor, a chat app, a texting tool and a fax line. ProjectPBX puts it all behind one login, with one bill and one support team.
Make and take calls right in the browser while the desk phone still rings. Hold, blind or attended transfer, busy-lamp keys that mirror your desk phone, and recent calls. No install.
Call queues with nine ring strategies, escalation levels, caller position announcements and a wallboard for the TV on the wall. Built into the same system as your phones.
One-to-one messages and rooms, with a badge that shows who's on a call. Start a video call or share your screen in one click, no separate meeting app.
Voicemails are transcribed by speech recognition running on our own servers, and recorded calls can be too. Your audio never goes to an outside AI service.
Customers can text the same number they call. Reply from the portal or the app, send pictures, schedule messages, and fax without a fax machine.
Reports by hour, day, extension and number in your own time zone, with CSV export and a scheduled email every morning. No spreadsheet gymnastics.
A screen pop lands a second before the phone rings: the caller's name, their number and the line they dialed, on extensions, ring groups and queues. Connect HubSpot or Salesforce and their CRM contact shows up too.
A map of each number: schedule, menu, who rings, where it falls back, with the path a call takes right now highlighted.
Find the call where a customer mentioned an invoice, in seconds.
Live demoEvery location keeps a dispatchable address and a callback number. The callback number goes out on every 911 call, and your people are alerted the moment someone dials.
Live demoDial *55 on any shared desk phone, enter your extension and PIN, and it becomes yours. *56 hands it back.
One script tag. Visitors type their number and your phones ring them straight back, within the hours you set.
From a two-person front desk to a full support floor, queues scale with you, and your changes land without dropping a waiting caller.
Callers keep their place without waiting on hold. We call them back, first in line.
Longest idle, round robin, least talk time and more, with a second tier when it's busy.
Monitor, whisper to the agent or barge in, from the switchboard.
A TV wallboard, refreshed every 3 seconds, that turns amber and red when waits slip past your target.
Tag every call with an outcome and ask callers how it went when they hang up.
Agents log in, log out and take breaks from the desk phone, the browser or the app.
The 4voice app turns an Android phone into your work extension. Make and take calls on your business line from anywhere.
A push wakes the app and your phone rings with Answer and Decline. Tested on a real Android phone on cellular, 2026-10-01.
Walking out of the office? Press *6 and the live call moves to your mobile. An add-on, switched on per company.
Team chat, visual voicemail, contacts with live status and queue log-in, everything from the desk, on the go.
ProjectPBX runs on proven open-source engines, FreeSWITCH, Kamailio and PostgreSQL, in a cluster with two front doors, a pool of voice servers and a hot-standby management platform.
Front doors send each call to a healthy voice server. If one stops answering, new calls go to the next.
Every front door and voice server remembers its last good configuration for 24 hours, so phones keep registering and calling even if management is down. Proven in a live test.
A live replica of the database stands by on a second server and takes over with one command. Practiced both ways in about 20 seconds.
Companies move between voice servers live: new calls go to the new server while calls in progress finish where they started.
A monitor scores the audio quality of calls through the front doors and alerts 4voice when it slips.
Phone systems are a favorite target for fraud. ProjectPBX stops it at the door, and gives managers the controls to see who changed what.
See securityAuthenticator-app sign-in with 10 one-time recovery codes. Single sign-on and automatic user provisioning as an add-on.
Browser-phone audio is encrypted with DTLS-SRTP, desk-phone TLS and SRTP is available per company, and portals redirect to HTTPS.
International calling starts switched off, every company has call limits and a calls-per-minute cap, and fraud guard checks for odd patterns every 5 minutes.
Scanners and password-guessers are banned across every front door at once.
Managers run the company. Users see only their own voicemail, recordings and call records.
An audit trail of who changed what, plus configuration history with rollback as an add-on.
Speech recognition and voices run on our own servers. Audio, recordings and voicemail never go to an outside AI service.
Set how long recordings and voicemail are kept, place holds, export everything or request erasure.
Phones provision themselves from a secret per-phone address: your extension, busy-lamp keys and clock, and on Yealink your logo as the wallpaper. Then connect the tools your team already uses.
See integrationsEvery feature below is live in ProjectPBX today. Search for what your phones need, and open the real screen for any of them.
62 releases and counting. Here are the latest three.
Pick the starting point that looks most like your business, then change anything. Seats or air time, the add-ons you switch on and your usage are itemized on one invoice.
For offices that want a modern phone system without the headaches.
For teams that live on the phones: support, sales and dispatch.
For managed-service providers and resellers who run phones for their clients.
These three are starting points for a quote, not fixed tiers · Bring your own phones or ask us · Keep your numbers, we help you port them
We walk you through ProjectPBX running, call it, text it, watch the wallboard light up, and map out what your switch would look like.
