What GSMCalls does today — and what's next.

Inbound and outbound calls between phones and SIP.

Android phones wired to a gateway PC.

Microcontroller per phone, digital wideband HD audio, no PC.

Bluetooth hands-free to the gateway.

Signal, battery, SIM, operator, heartbeat.

Restart services and control devices remotely.

Many gateway sites in one portal.

UDP, TCP and TLS with registration or IP auth.

Mobile calls delivered to your PBX or DID.

SIP calls placed through the right phone.

Prefix, DID and group-based routing with failover.

G.711, G.729 trunk side; G.722 and Opus device side.

Where legally permitted, with retention controls.

Calls, ASR, ACD, minutes and revenue live.

Billable time, rate, cost and cause for every call.

Reusable rules for minutes, time and countries.

Offline, weak signal, trunk faults, usage thresholds.

Per-device and per-trunk event history.

OPTIONS checks, latency, loss and jitter.

Balances and top-ups per account.

Allowances per device, SIM, customer or gateway.

Hard stops per profile and period.

Separate customers with their own usage.

Resellers, customers and sub-customers.

Your brand, domain, colours and invoices.

Devices, CDRs and balances programmatically.

Encrypted SIP signalling.

Private tunnels from site gateways to the cloud.

Allow-listed IPs for every trunk.

Scoped roles per tenant.

Who changed what, and when.

Secrets encrypted at rest.