IP PBX · version 3.81
PCBest SIP PBX
A free, light and powerful IP PBX for Windows.
A Windows SIP PBX with ACD, ring groups, call parking, auto attendant, pickup groups, conference, auto dialer and database CDR reports. Set up your own call center in a few minutes.
AI agent
v3.81 connects callers to a ChatGPT (OpenAI) agent.
Secure
SRTP media and SIPS (TLS) signalling.
Call center ready
ACD queues, ring and hunt groups, whisper for supervisors, call parking and pickup.
Plugins
Customize IVR menus in C# or VB.NET, and control the PBX through the TCP manager interface.
Database driven
Configuration and CDRs live in MS SQL, so you can change settings on the fly.
Runs as a service
Windows service with a web console and backup and restore; runs on VMware and Windows Server virtual machines.
Editions
Free edition vs Professional edition
| Feature | Free | Professional |
|---|---|---|
| Price | Free | Quote |
| Support | Not included | Quote |
| Extensions | Unlimited | Unlimited |
| Simultaneous calls | Up to 8 | 8 to 256 |
| Plugins | First line only (demo) | All lines |
| Automatic outbound tasks from DB | 100 calls (demo) | Unlimited |
| TCP manager clients | 1 (development) | Unlimited |
| All phone system and call center features | Yes | Yes |
For Professional edition pricing, contact us.
Source code
Make it your own PBX
The C# source code of SIP PBX v3 is available, so you can translate the admin tool into your language and put your own brand on it. The solution includes the Windows service wrapper, the PBX core library, the admin GUI, a test harness and the installer project.
Ask about the source code// SIPPBXGUI/Form1.cs
SelfBrand = "My Brand Name IP PBX";
SelfBrandWebLink = "https://www.mycompany.com/";Features
Everything in PCBest SIP PBX
Phone system
- Blind and attended transfer
- Forward on busy and on no answer
- DID routing and caller ID
- Auto attendant / digital receptionist
- Voice mail with MWI, and voice mail to email
- Music on hold, call recording, conference rooms
- BLF and intercom
Call center
- ACD and call queueing
- Ring groups and hunt groups
- Call parking and call pickup
- Supervisor whisper
- Automatic outbound tasks from the database
Management
- Web management console and live status
- Automated backup and restore
- Firewall and NAT friendly
- Users configure their own extension settings
- Advanced forwarding by caller ID, time and call type
Devices and providers
- SIP hardware and software phones, video phones
- Leading SIP gateways and VoIP providers
- SIP trunking over UDP, TCP and TLS
- Codecs: G.711, G.726-32, GSM, Speex, iLBC
Downloads
Get PCBest SIP PBX
- SIP PBX v3.81 (free edition)Released January 12, 2025
- Setup guide (PDF)Install and first configuration (opens in a new tab)
- Brochure (PDF)Why choose PCBest IP PBX (opens in a new tab)
Need a license? See the price list or get a trial license.
What customers say
“I've installed your SIP PBX, and I have to say: THANK YOU! It's just a great system, online within 5 minutes.”
“We use PCBest SIP PBX to provide our community with the ability to voice opinion on our radio stream. Their software solution is the best we have found.”
“It is easy to setup, resource friendly and seems to run really stable.”
Ready to build with PC Best?
Ask for a quote, a trial license, or a quick technical answer. Our technical team is happy to help with your VoIP project.