Patent ID: 8290137

Claim:
A method for obtaining routing information for a telephone call to be placed through a Voice Over Internet Protocol (VOIP) system, comprising: receiving information about a destination for a call that is to be placed, and an identity of a client requesting that the call be placed; determining if routing information for the call exists in an exception routing table for the client requesting that the call be placed, the exception routing table indicating one or more destination gateways that could be used by the VOIP system to complete the call; attempting to complete the call using the routing information contained in the client's exception routing table, if routing information for the call exists in the client's exception routing table; and attempting to complete the call using routing information from a general routing table if no routing information for the call exists in the client's exception routing table, the general routing table also indicating one or more destination gateways that could be used by the VOIP system to complete the call.