Aliwei virtual carrier solution supports the originating carrier that hands calls over to a VoIP wholesaler at a profit. Termination settlement rates are generally lower than PSTN termination rates—the key reason why long-distance carriers will choose a VoIP carrier for termination. Furthermore, termination bandwidth is often available over VoIP to countries where PSTN termination is unavailable because of congested international gateway facilities or other reasons. The average call success rate is as good as or better than that provided by PSTN carriers, and voice quality, including echo cancellation, is uncompromised.

Key features of this service include the following:

As part of this service, virtual carrier to carrier termination services are supported. The virtual carrier originates the call, often over an Internet-enabled PC-telephony application, or through a PSTN portal for cellular phone callers.

When multiple partners join to provide wholesale voice services, the services described in the preceding sections may require the assistance of clearinghouse services for billing and settlement. The Aliwei wholesale voice solution supports call termination agreements through Open Settlement Protocol in Aliwei devices.

Open Settlement Protocol relies upon Aliwei Open Packet Telephony framework at the call control layer. Service providers that use Open Settlement Protocol(the only standard IP interface for VoIP clearinghouse functions), must do business with only one settlements provider. As a result, there is no need to negotiate separate agreements with carriers in multiple countries, meet varied technical requirements for

interconnection, make repeated arrangements for call accounting, or establish multiple credit accounts. The Open Settlement Protocol clearinghouse solution virtually eliminates the risk of doing business with new service providers that have a limited credit history—or with carriers in countries subject to currency fluctuations. In addition, it gives virtually every VoIP provider the worldwide calling reach it requires.

Open Settlement Protocol uses a standard protocol approved by the Internet Protocol Harmonization over Networks organization of the European Telecommunications Standards Institute (ETSI TIPHON). By allowing gateways to transfer accounting and routing information securely, this protocol provides common ground between VoIP service providers. Consequently, third-party clearinghouses with an Open

Settlement Protocol server can offer call authorization, call accounting, and settlement—including all the complex rating and routing tables necessary for efficient and cost-effective interconnections.

In most cases, a wholesale provider will subcontract with a clearinghouse partner to provide wholesale voice services with proper settlement. However, a clearinghouse solutions vendor can also independently take advantage of the Aliwei wholesale voice solution to achieve market objectives.

As an enhancement to simple carrier-interconnection applications, the Aliwei wholesale voice solution makes it possible to route a call to different destination carriers. You have the same considerations as with simple carrier-interconnection models, but with slightly increased call-routing responsibilities. The directory

gatekeeper can make limited egress carrier-sensitive routing decisions by using the sequential LRQ feature, which is available to the applications using directory gatekeeper routing. Generally speaking, this means any TDM partners and directory gatekeeper peering partners, but also includes any Open Settlement Protocol partners in which an Open Settlement Protocol interconnection zone is used, as opposed to a direct implementation on your gateways.

This figured project aim to virtual telecom carriers, provide convenient and competitive IP voice service at place where population is centralized such as school, factory traffic center etc. It can realize smooth transition and do not need to change current network if new IP Phone business addresses will be added in the future.

Set a Aliwei EID3000 series digital gateway in Virtual Carrier's Center equipments room, connect E1 port with PSTN networking, as the trunk gateway of each IP supermarket. Each sales outlets use Aliwei EIA20X series (provide 2-32 ports or more according the need) as access gateway. Business billing in IP Phone bussiness address using Aliwei gateway billing software, management billing to each IP Phone business address in center equipments romm use Softswitch,billing system.

Central equipments room equip Softswitch, calling mange based on SIP to IP voice equipments of whole network. If the trunk gateways in central equipments room are not enough, add the quantity of trunk gateway. Made all trunk gateways realize load equilibria through Softswitch.

Networking Diagram using Aliwei VoIP equipments forvirtual carrier projects