■ VoIP Outbound Call Solution for Service Provider With the development and proliferation of VoIP, the VoIP-based Outbound call service by service provider is becoming an attractive and profitable business, and more and more service providers prepare to provide such service. Voipack with field-proven VSS and CPEs is going to offer service providers a remote Outbound call solution based on mature technology and reliable performance. Topology for Outbound Call Solution for Service Provider Network Description ● VoIP gateway accesses the Internet via WAN to register with VSS and connects with PSTN trunks via FXO port; ● VSS registers or connects with remote digital trunk gateway; ● Digital trunk gateway connects the Internet and remote PSTN. Call Establishment 1. The user at local PSTN dials the PSTN access number to reach the VoIP gateway; 2. The VoIP gateway sends the call request to VSS, and VSS then rectifies the call request received; 3. VSS establishes a connection between VoIP gateway and Trunk gateway for RTP packet transmission. 4. The trunk gateway sends voice signals through front-end PBX to remote PSTN. Thus, a call is established between local PSTN and remote PSTN through Internet. Applications Voipack provides the core components in this solution---VSS and VoIP gateways. VSS can be configured to offer a variety of solutions to fulfill service providers' requirements. 1. IVR Password Authentication IVR password authentication is suitable for prepay IP Phone card solution. Key VSS components include: Voipack Message Server (VMS), Voipack Billing Server (VBS), Voipack Call Master (VCM). VMS provides voice prompt, voice prompt menu and voice- guided call fee query system. It also supports multiple voice menus in different language. VBS is a billing system, designed to generate PIN number and password, provide authentication and billing control, implement real-time monitoring on account balance and send voice prompt when the account balance is becoming 0. VCM provides call connection and multi-routing function. The Caller dials service provider’s PSTN access number to reach the VoIP gateway; VoIP gateway sends a call request to VCM which, along with the PIN number and password which then are forwarded to VBS for authentication. If VBS successfully authenticates the PIN number and password, it starts billing and returns an acknowledgement to VCM, VCM thus establishes a call between the local and remote PSTN. 2. Caller ID Authentication For Caller ID authentication, the caller is charged based on the Caller ID. Key VSS components include: Voipack Billing Server (VBS), Voipack Call Master (VCM). The Caller dials service provider’s PSTN access number to reach the VoIP gateway. VoIP gateway sends a call request and the Caller ID to VCM, VCM receives the Caller ID and forwards it to VBS for authentication. If VBS successfully authenticates the caller ID, it starts billing and returns an acknowledgement to VCM, VCM thus establishes a call between the local and remote PSTN. Caller ID authentication allows prepay and postpay payment method. In case of prepay payment, it provides real-time monitoring on account balance and automatically disconnects the ongoing call when the balance becomes 0. In case of postpay payment, it sets credit standing limits for call fee control. 3. Auto dialer Auto dialer solution uses an external device (auto dialer) to simplify the dialing procedure. Key VSS components include: Voipack Billing Server (VBS), Voipack Call Master (VCM), Voipack Message Server (VMS).The auto dialer accompanied by IVR password authentication or caller ID authentication, relieves users of tedious manual entry of PSTN access number, PIN number and password. The user may reach the remote PSTN number of the callee by dialing the callee's number directly as long as he makes necessary configuration on the auto dialer. In case of IVR password authentication plan, the auto dialer dials service provider’s PSTN access number, and supplies PIN number and password automatically, where the user only needs to enter the Callee's number, a call will then automatically be established by VSS. In case of Caller ID authentication plan, the auto dialer dials service provider's PSTN access number automatically, and then sends the Callee’s PSTN number to VCM, along with the Caller ID which is then forwarded to VBS for authentication. If VBS successfully authenticate the caller ID, VSS will establish a call between the local and remote PSTN number. The auto dialer solution by aforesaid applications is capable of converting existing circuit- based auto dialer solution to VoIP-based auto dialer solution.