A method is disclosed for connecting a customer representative to a customer switch within a telecommunications network having a plurality of switch domains, each switch domain including a plurality of switches each having a corresponding switch name. At least one of the switches is a gateway switch....http://www.google.com.hk/patents/US6693876?utm_source=gb-gplus-share專利 US6693876 - Selecting IPX/IGX nodes in a multi-domain environment
