USB for wired racks, Bluetooth for quick installs, Smart Bridge for HD audio with no PC. Mix them across sites — the cloud platform doesn't change.
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.