Tenant-bound trunks
Tenant identity comes from authenticated trunk bindings, never from a caller-controlled SIP From header.
Production edge online
SIP trunk infrastructure built for control.
TGCALL turns upstream voice capacity into tenant-isolated, metered and auditable SIP trunks. 多租户 SIP Trunk 基础设施：隔离、计费、对账，一套完成。
Voice infrastructure with financial truth.
Routing, rating and ledger behavior are designed as one platform—not as disconnected carrier dashboards.
Deterministic billing
Billing begins at 200 OK and the selected rate version is locked when the INVITE enters the platform.
Auditable outcomes
Financial effects are idempotent, so usage, balance and reconciliation converge on the same call record.
Commercial access is invitation-only.
Public pricing, provider claims and mobile-app promises have been intentionally removed until each item is validated for the TGCALL production offer.