ISDN subscriber line interface circuits of a switching system serve customer premises equipment of different information transfer capabilities. Least cost routing data and corresponding digit conversion data are stored in a memory, with the routing data indicating least cost outgoing routes through an...http://www.google.es/patents/US5289536?utm_source=gb-gplus-sharePatente US5289536 - Least cost routing method according to information transfer capability of customer premises equipment
Least cost routing method according to information transfer capability of ...
