Patent ID: 6639981
Filing Date: 2003-10-28
Classification: H04L,H04M,H04Q

Abstract:
A triggerless number portability routing node, the routing node comprising:(a) a communication module for receiving a first call setup message from a first end office associated with a calling party over a first communications network, the first call setup message including a first called party address and a ported number translation indicator; (b) a stop action process for examining the ported number translation indicator to determine whether number portability processing is required and, in response to determining that number portability processing is required, encapsulating the first call setup message in a first packet; (c) a number portability database containing packet routing instruction records associated with ported subscribers; and (d) a number portability process for receiving the first packet, extracting the first called party address from the first packet, performing a lookup in the number portability database using the first called party address to obtain a second called party address associated with a second end office, and modifying the first call signaling message to include the second called party address.