Multiplex communications – Wide area network – Packet switching
Patent
1994-06-17
1996-08-27
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 16, H04J 312
Patent
active
055508340
ABSTRACT:
ISDN access to a telecommunications network is provided to customers at different locations by sharing a D-channel controllers (DCC's) positioned within the network in close proximity to the ISDN-capable toll switches serving those customers. The customers provide call set up parameters to a DCC via a user interface system (UIS) at the customers premises that communicates via a dial-up data connection with a respective user support system (USS) connected to the DCC. The DCC in turn formulates ISDN signaling messages that are sent to the switch via a PRI interface and set up an appropriate communications path through the network to a desired destination. Data originating in customer premises equipment is received in the switch via a T1 access line operating in the "non-facility associated signalling" mode. Alternatively, a central USS located in a control center within the telecommunications network, transmits, via dial-up data connections, signalling information to individual USS's supporting associated DCC's.
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D'Ambrogio William J.
McCourt Karen M.
Phillips Wayne D.
Saleh Patricia D.
Seip Barry S.
AT&T Corp.
Freedman Barry H.
Gurey Stephen M.
Hom Shick
Olms Douglas W.
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