VOIP Solutions - St Louis, MO

Discover the Advantages of a True VoIP IP PBX – 3CX Phone System

3CX Phone System for Windows is an award-winning software-based IP PBX that replaces traditional proprietary hardware PBX. It is based on the SIP standard and supports most popular SIP phones, VoIP Gateways, VoIP service providers and PSTN phone lines. It is easy to manage by system administrators as it integrates well with Windows Network infrastructure.

“We have been very pleased with the overall capability of the 3CX telephone system within our business. With a Windows-based system, we have control over the phones and don’t have to pay for support from our old provider.”

-Brian Dunn, Agilis

Stay one step ahead of the competition with
Computer St. Louis and 3CX’s hosted options.


With on-premise phone systems, the prevailing attitude is, “If it’s not broke, don’t fix it.” When your technology perpetually lags behind, it’s almost impossible to get ahead. With Computer St. Louis Hosted Systems, advanced features are rolled out as soon as they become available, making it possible for you to stay one step ahead of the competition at all times.


You’re not always at your desk. In fact, you’re not even always at the office! Stay in control of your interactions with customers and employees anytime, anywhere.

  • Get your business calls from any device
  • Get your voicemails delivered as email attachments


You can’t predict the future. Computer St. Louis and 3CX takes the guesswork out of business growth, making it easy for you to scale up or down as needed.

  • Add multiple locations seamlessly
  • Add new users as needed at one fixed rate


You need a phone system that’s strong enough to withstand natural disasters. With Computer St. Louis, you get built-in redundant hardware, software and circuitry to keep your phones ringing even during power outages and hardware failures.

  • Multiple levels of redundancy keep you protected
  • Automatically reroute calls to voicemail, your cell phone or a home phone


Let your phone system work for you with crowd-pleasing advanced features that lighten your team’s workload and exceed your customers’ expectations.

  • Never miss a call with simultaneous ring
  • Work from anywhere, anytime, on any device