Virtual Private Voice Networks

Virtual Private Voice Networks cost-effectively interconnect corporate voice traffic between multiple locations over the PSTN. The alternative to Virtual Private Voice Networks is dedicated tie-lines between locations. Because multiple locations are not typically served by the same exchange, however, Virtual Private Voice Networks are a far more economical solution in such scenarios.

SPs offer cost-competitive Virtual Private Voice Network services by maximizing the private use of public infrastructure. Therefore, public network facilities are somewhat balanced by corporate use during weekdays and residential use during nights and weekends.

Virtual Private Voice Network customers access the public network by interconnecting private network facilities, such as T1 circuits. SS7 facilities, messaging, and inter-working enable VPNs across the public infrastructure. SS7 capabilities also enable corporate and PBX features to be carried transparently across the network. Another benefit of deploying a voice-capable network is to ease the process of adding new and multiple sites to an existing Virtual Private Voice Network. With Virutal Private Voice Networks, this is as easy as adding a new connection to the network and provisioning the appropriate translations and dialing plans. With tie-lines, on the other hand, new end-to-end connections are required between the new location and each existing location, resulting in higher costs to the customer.

Public switching systems identify, process, and route calls based on different protocols and dialing plans. The identity of each Virtual Private Voice Network is made possible by customer-group id numbers that are maintained and transmitted across the public network through SS7. You use this capability to distinguish and route public calls from private intra-network calls. The customer group identity and other information is inserted in ISUP messages for transmission across the public network.

Dialing plans ensure proper handling of full North American Numbering Plan (NANP) 10-digit station routing and 7-digit on-net to on-net, on-net to off-net, and off-net to on-net routing. The call processing, routing, and dialing capabilities provide uniform dialing plans and access to users at remote locations.

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