Common routing

摘要

In an embodiment, call routing from a customer to a destination is provided by intercepting a call setup message sent from a customer switch intended to signal a switch to perform a call routing function. In response to the call setup message being intercepted, a routing engine is queried with the destination of the call for a specific route over which to carry the call to the destination. The call setup message is modified to include the specific route. The switch is directed with the modified call setup message to use the specific route to carry the call from the customer to the destination.

主权项

1. A method for routing a call from a customer to a destination, the method comprising:
intercepting, at an application server, a call setup message sent from a customer switch to a switch intended to signal the switch to perform a call routing function, the call routing function determines a route for the switch to use to carry the call to the destination, the route so determined is a switch-determined route; in response to the call setup message being intercepted, querying a routing engine with the destination of the call for a specific route over which to carry the call to the destination, the specific route queried from a set of routes that is different from another set of routes from which the call routing function determines the switch-determined route; modifying the call setup message to include the specific route, the call setup message so modified is a modified call setup message; and directing the switch with the modified call setup message to use the specific route to carry the call from the customer to the destination;wherein the application server performs the method without needing a service transfer point 1) to intercept the call setup message and 2) to direct the switch with the modified call setup message.