GSMCalls
How it works

From first phone to live calls in four steps.

No proprietary chassis and no rebuild when you grow. Here's exactly what happens.

  1. Step 01

    Create your account

    Open a GSMCalls workspace, add your team and choose roles.

    • Workspace on its own subdomain
    • Invite admins, operators and viewers
    • Set currency and time zone
  2. Step 02

    Install your gateway

    Connect phones with the method that suits each site: Smart Bridge phones run the GSMCalls app and need no PC; USB and Wireless use a gateway computer.

    • USB Connect, Wireless Connect or Smart Bridge
    • The app or gateway pairs to your workspace with a one-time code
    • Phones appear in Devices within seconds
    • USB ConnectPowered USB hub and audio cabling to a gateway PC.
      wired
    • Wireless ConnectBluetooth adapters on a mini PC. No audio cables.
      bluetooth
    • Smart BridgeA microcontroller on each phone’s USB-C; the GSMCalls app streams HD audio to the cloud. No PC.
      bridge · app
  3. Step 03

    Connect SIP

    Add your PBX, SBC, softswitch or SIP trunk, then route prefixes and DIDs to locations.

    • UDP, TCP or TLS
    • IP allow-lists and codec priority
    • Health checks with automatic failover
  4. Step 04

    Start managing calls

    Watch calls, devices, minutes and money in real time — and set the rules that keep them in check.

    • Live dashboard and alerts
    • Device profiles and prepaid limits
    • CDRs ready to export

What you need on site

Check phone compatibility →

  • A gateway computer (USB · Wireless)

    A PC or mini PC per site for USB Connect or Wireless Connect. Smart Bridge needs no PC — just the phone, the GSMCalls app and Wi-Fi or mobile data.

  • Mobile phones and SIMs

    Validated models with active SIMs from your carriers.

  • Connection hardware

    A powered USB hub, Bluetooth adapters, or one Smart Bridge per phone.

  • A SIP platform

    Your PBX, SBC, softswitch or SIP trunk provider.