Patents Assigned to DSC Communications Comporation
  • Method and apparatus for providing local number portability
    Patent number: 5598464
    Abstract: A system (10) includes a calling party (12) that initiates a call to a ported customer (14). Upon receiving the call from calling party (12), switch (16) generates a trigger indicating that ported customer (14) is now being serviced by another switch (20). Switch (16) transfers the call to a service node (22) that includes a database (28) containing routing information. Service node (22) routes the call to switch (20) now providing service to ported customer (14). Several variations of calls to ported customer (14) are described.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: January 28, 1997
    Assignee: DSC Communications Comporation
    Inventors: Thomas L. Hess, William R. Minch