A user calls a directory assistance service provider to search for a desired telephone number and be connected to a party at the desired number. In one such connection, the user is afforded enhanced directory assistance upon a user command in the form of an out-of-band signaling message, e.g., SS7 signaling...http://www.google.fr/patents/US7020261?utm_source=gb-gplus-shareBrevet US7020261 - Method for providing enhanced directory assistance upon command using out-of-band signaling
Method for providing enhanced directory assistance upon command using out-of ...
