Method and apparatus for restricting dialing authorization in co

Details Method and apparatus for restricting dialing authorization in co Method and apparatus for restricting dialing authorization in co

1997-03-14

1999-12-07

Smith, Creighton

Telephonic communications

Call or terminal access alarm or control

At substation

379 9302, H04M 166

Patent

active

059996072

ABSTRACT:
A communications system includes a processor and associated memory containing information identifying dialing authorizations for a plurality of Personal Identification Numbers thereby a user to enter a personal identification number to receive access to authorized connections.

REFERENCES:
patent: 5497411 (1996-03-01), Pellerin
patent: 5809126 (1998-09-01), Smith et al.
Liske, Lutz and Maier, Anton: "ISDN im Buro-HICOM", Seite 41, 42 and 49, Siemens AG, Berlin & Munchen.

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