Method and apparatus for controlling access to a communication s

Details Method and apparatus for controlling access to a communication s Method and apparatus for controlling access to a communication s

1992-09-15

1993-12-28

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082534, 340528, 379 63, H04Q 100, G06F 704, H04M 1102, G08B 2300

Patent

active

052743683

ABSTRACT:
A communication system base site (300) receives a signal (400) representing a request from a communication unit (200) to access the communication system (100). The signal includes an identification code (402) and another code which represents when the communication unit was authorized to access the communication system (410). The base site (300) operates to process the identification code (402) to initially determine that the communication unit (200) should not be permitted access to the communication system (100). Additionally, the other code (410) is processed to determine whether the communication unit (200) was authorized to access the communication system (100) within a time interval. If so, the communication unit (200) is permitted to access the communication system.

REFERENCES:
patent: 4378551 (1983-03-01), Drapac
patent: 4626845 (1986-12-01), Ley
patent: 4672376 (1987-06-01), Lewiner et al.
patent: 4677434 (1987-06-01), Fascenda
patent: 4682351 (1987-07-01), Makino
patent: 5012234 (1991-04-01), Dulaney et al.
patent: 5058201 (1991-10-01), Ishii et al.
patent: 5060263 (1991-10-01), Bosen et al.

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