Method and network for routing a communication through an alternate carrier. The network routes a communication based on a dedicated identifier through a plurality of interexchange carriers upon input of the dedicated identifier and a request code, and has a node configured to request carrier data in...http://www.google.com.hk/patents/US6697480?utm_source=gb-gplus-share專利 US6697480 - Method and network for routing a communication through an alternate carrier
