25. An automated directory assistance system as defined in claim 24, wherein said at least a portion of a telephone number dialed by the user is an NPA portion of a telephone number permitting access to the directory assistance function.
25. An automated directory assistance system as defined in claim 24, wherein said at least a portion of a telephone number dialed by the user is an NPA portion of a telephone number permitting access to the directory assistance function. 26. An automated directory assistance system as defined in claim 25, comprising a computing unit for computing said probability value for a plurality of vocabulary items.