1
Reading Craig Alan, Sprague David Lee, Wilson Lance Wayne: Method and circuitry for routing a call.. American Telephone & Telegraph, July 8, 1992: EP0493896-A2 (38 worldwide citation)

A network routing method and structural embodiment wherein a call is routed from a calling station (110) to a desired called destination (115) among a plurality of destinations reachable by a number dialed from the calling station, and wherein that routing illustratively is through a digital link sp ...


2
Slutsman Lev, Tewani Kamlesh T, Wilson Lance Wayne: Methode pour accelerer le traitement des appels dans les environnements a transfert de numeros, Method of enhancing call processing in a number portability environment. At&T, At&T, KIRBY EADES GALE BAKER, April 30, 2002: CA2237286

A method is provided which reduces post-dial delay in a number portability environment. In particular, a switching office which controls call routing to portable numbers (NPA-NXXs) contains a cache for which location routing number response information may be stored. The processing office concurrent ...


3
Tewani Kamlesh T, Wilson Lance Wayne: Methode pour accelerer le traitement des appels dans les environnements a transfert de numeros, Method of enhancing call processing in a number portability environment. At&T, At&T, KIRBY EADES GALE BAKER, June 25, 2002: CA2237354

METHOD OF ENHANCING CALL PROCESSING IN A NUMBER PORTABILITY ENVIRONMENT A method reduces the number of queries generated to a number portability database. The number portable communication system includes a local cache associated with the switching office or facility responsible for identifying and ...