Without any cables.
Two cable-free options: connect phones over Bluetooth with Wireless Connect, or plug in the GSMCalls Smart Bridge microcontroller — both with digital wideband HD audio, and everything managed from one cloud platform.
Designed for telecom operators, integrators and distributed gateway environments.
Live status, SIP health, prepaid balances and full CDRs — for one site or every site you run.
Pick the architecture that fits each site. Every option runs on the same cloud platform, with the same routing, CDRs, billing and monitoring.
Android phones connect to a local gateway computer through a powered USB hub and audio cabling. Predictable, physical, easy to rack.
Best suited for — fixed gateway rooms and dense Android deployments where wired connections are preferred.
Less wiring. Faster deployment. Phones pair with the gateway over Bluetooth — Android and iPhone models where validated.
Best suited for — quick installs, mixed Android and iPhone fleets, and sites where cabling is impractical.
Compatible Bluetooth devices subject to model and OS validation.Dedicated phone-to-platform connectivity — no PC. A compact microcontroller bridge plugs into each phone's USB-C (short Y/PD cable with charging pass-through), and the GSMCalls app streams digital wideband HD audio straight to the cloud over Wi-Fi or mobile data.
Best suited for — distributed phones anywhere with Wi-Fi or data, where you want HD audio and no PC.
| USB Connect | Wireless Connect | Smart Bridge | |
|---|---|---|---|
| Best suited for | Fixed, wired installations with many Android phones | Fast, low-cable deployments and iPhone support | HD audio anywhere, no PC |
| Connection type | USB + audio cabling to a gateway PC | Bluetooth hands-free to a gateway PC | Microcontroller on the phone’s USB-C; the app streams to the cloud — no PC |
| Phone compatibility | Validated Android models | Validated Android and iPhone models | Validated Android phones with USB-C |
| Physical cabling | One cable per phone to the hub | Power only, no audio cabling | Short USB-C Y/PD cable at the phone |
| Deployment complexity | Moderate | Low | Low |
| Device density | High, hub-based racks | Medium, per adapter | High, one bridge per phone |
| Ease of replacement | Swap phone, reassign in portal | Re-pair over Bluetooth | Move the bridge to a new phone |
| Audio interface | Wired audio | Bluetooth hands-free audio | Digital wideband (HD) audio |
| Recommended deployment | Gateway rooms, fixed racks | Offices, pop-up and mixed fleets | Distributed phones, no gateway PC |
| Remote management | Included | Included | Included |
| SIP integration | Included | Included | Included |
| CDRs | Included | Included | Included |
| Billing | Included | Included | Included |
| Monitoring | Included | Included | Included |
| Multi-site | Included | Included | Included |
GSMCalls Cloud sits between your SIP platform and your phones. Hover a method to follow the call path.
One control plane for devices, trunks, routing, usage and money — built for operators who run more than one site.
Calls, ASR, ACD, minutes and revenue as they happen.
Signal, battery, SIM, operator and status for every phone.
Trunk registration, sessions, codecs, latency and loss.
TLS, ACLs, codec priority, prefix routing and failover.
Every call with billable time, rate, cost and cause code.
Balances, top-ups and minute allocations with hard stops.
Minutes, time windows, countries and limits as reusable rules.
Offline phones, weak signal, trunk faults and usage thresholds.
See model, operator, signal, connection method, battery and minutes for each device — then act on one or a hundred at once.
Registrations, live sessions, codecs, latency and packet loss for every trunk, with clear status and automatic failover.
Create profiles that define how many minutes each device, SIM, customer or gateway can use — with alerts before anyone runs out.
Full call detail records with billable duration, rate, cost and disconnect cause — filtered your way and exported in one click.
Run gateways in Chicago, Toronto, London, Istanbul, Dubai and Lagos from one portal. Each site reports devices, calls, minutes and health in real time.
Define minutes, call length, daily limits, routing, caller-ID policy, countries, time windows and spend once — then apply the profile to any device, SIM or customer.
Build gateways around commercially available phones rather than expensive proprietary gateway chassis.
Choose wired USB, Bluetooth wireless or Smart Bridge connectivity — per site, per rack.
Monitor devices, calls, trunks, minutes and gateways remotely, from any browser.
Operate gateway deployments in multiple locations from one platform and one login.
Manage prepaid minutes, spending limits, customer profiles and usage without spreadsheets.
Start with a few phones and grow to hundreds without rebuilding your management layer.
Open your GSMCalls workspace and invite your team.
Pair phones with the GSMCalls app and Smart Bridge, or connect them to a site gateway over Bluetooth or USB.
Add your PBX, SBC, softswitch or SIP trunk — TLS supported.
Monitor calls, devices, minutes and performance from the cloud.
GSMCalls supports lawful, authorised deployments — integrating mobile networks with your existing SIP estate.
Add mobile termination capacity you manage yourself.
Route per prefix across sites with full CDRs.
Local mobile presence for agents on your existing PBX.
Offer mobile-network reach to your SIP customers.
Connect Asterisk, FreePBX or 3CX to mobile lines.
Run many customers from one multi-tenant portal.
White-label the platform under your own brand.
Reach mobile users abroad over authorised routes.
Bridge corporate SIP with company mobile SIMs.
Build mobile voice into your own products.
Resellers and managed service providers run GSMCalls under their own name. Customers see your portal, your colours and your support details.
One flat monthly price per plan — not per device.
For operators running several gateways.
Step-by-step guides for each connection method, SIP configuration, routing, CDRs and billing.
curl https://api.gsmcalls.net/v1/devices?status=online \
-H "Authorization: Bearer $GSMCALLS_TOKEN"
{
"data": [{
"id": "GW-CHI-001",
"connection": "usb",
"operator": "AT&T",
"signal_dbm": -74,
"minutes_remaining": 715
}]
}Still unsure? Talk to an engineer — we'll map your site to the right architecture.
Talk to an EngineerCommercially available Android phones, and iPhone models over Wireless Connect where validated. Every model is listed with its status — Verified, Beta, Testing or Not Supported — on the Compatibility page.
No proprietary chassis. With Smart Bridge you need only the phone, a compact microcontroller bridge on its USB-C, the GSMCalls app and Wi-Fi or mobile data — no PC. USB Connect and Wireless Connect use a gateway computer at the site.
GSMCalls is designed for standard SIP environments — PBXs, SBCs and softswitches — over UDP, TCP or TLS.
Yes. Each site runs its own gateway; all of them report to one cloud portal with per-location devices, calls, minutes and health.
You create profiles with minute allocations and spending limits per device, SIM, customer or gateway. Alerts fire at 75%, 90% and 100%, and you choose what happens when a plan is exhausted.
GSMCalls is built for lawful, authorised deployments. You remain responsible for local telecommunications regulations and your mobile carriers’ terms of service.
Connect a few phones or manage hundreds of devices across multiple locations from one platform.