Network-based caller speech muting
Network-based conference system
Network-independent communications system
Networkwide desk sharing with automatic device relocation
No answer mode for telephone systems
Non-KSU message delivery system
Normalization of calling party sound levels on a conference brid
Number portability for a cluster of switches
Number portability using database query
Number portability using enhanced routing table
Number portability using enhanced routing table
Number portability using ISUP message option
Number portability using ISUP message option
Number portability with database query