■ VoIP Inbound Call Solution for Service Provider With the growing international communication need, foreign service providers having huge minutes are seeking for local call termination service every where. Voipack with its field- proven VSS and CPEs offers a VoIP international inbound call solution for service provider aiming at such business. Topology for VoIP Inbound Call Solution Network Description ● The remote service provider connects the trunk gateway to VSS through a static router, sending voice signaling to VSS; ● The VoIP gateway registered with VSS accesses PSTN (telephone lines or trunks) via FXO port to terminate a call. Call Establishment ● The voice traffic are collected and sent to the trunk gateway, and then be handed over to VSS; ● VSS authenticates the call from the trunk gateway and then forwards it to local VoIP gateway; ● The VoIP gateway terminates the call via FXO port to PSTN; VSS is responsible for billing control during the process. Features VSS is well compatible with VoIP gateways and trunk gateways based on different protocols, H.323, MGCP or SIP. It is capable of translating between protocols to ensure normal communication between CPEs. The analog VoIP gateway connects to PSTN by either phone line and trunks or GSM wireless devices for call termination; the digital VoIP gateway connects to PSTN by T1, E1 for call termination. Furthermore, VSS supports multiple number replacement rules to accommodate various inter- connection requirements of service providers. It also supports multiple international routings upon which priority level can be set. Notably, Voipack VOG4000 (VoIP analog gateway), capable of reverse polarity detection and busy tone detection, dramatically improves the accuracy of billing, where VSS will not start billing if the callee is busy or does not answer the call.