Patents Assigned to Australian and Overseas Telecommunications Corporation Limited
  • Enhanced telephony apparatus and system
    Patent number: 5519770
    Abstract: An enhanced services unit for connection to existing exchanges is described. The unit is connected via an exchange emitting CCITT common channel signaling system #7 (CCSS#7) trunk connections to an existing exchange and is viewed by the exchange as another exchange. The unit may control switching via re-entrant trunks on the main exchange. Services are software defined and may be configured to suit particular customers. An advantageous implementation of the message transfer part of CCSS#7 is also described.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: May 21, 1996
    Assignee: Australian and Overseas Telecommunications Corporation Limited
    Inventor: Calvin J. Stein