Communications: electrical – Digital comparator systems
Patent
1979-08-27
1981-07-28
Pitts, Harold I.
Communications: electrical
Digital comparator systems
364200, G06F 300, H04Q 500
Patent
active
042813158
ABSTRACT:
A central controller (104) for a multipoint polling system arranged to collect inquiry messages from data terminals (102a-n, 103a-n) for processing by a data base (101) and for distributing response messages to the terminals, the several terminals using different communication protocols. The controller includes a RAM memory (203) which stores a list of items, each item identifying a terminal and the type of protocol used thereby, a ROM memory (202) which stores an instruction set for each protocol type and a microprocessor (201) which sequentially accesses each item on the list to poll the associated terminal and accesses the instruction set identified in the item to control sending and receiving equipment to query and intercommunicate with the selected terminal in accordance with the accessed instructions.
REFERENCES:
patent: 3699525 (1972-10-01), Klavins
patent: 3768076 (1973-10-01), Recoque
patent: 3846763 (1974-11-01), Riikonev
patent: 4058838 (1977-10-01), Crager
patent: 4079448 (1978-03-01), N'Guyen
patent: 4100533 (1978-07-01), Napolitano
patent: 4103328 (1978-07-01), Dalmasso
Bauer Henry C.
Burns Gary J.
Buzzard Clair A.
Gordon Travis H.
Kahlbrock Heinz
Bell Telephone Laboratories Incorporated
Lipton Roy C.
Pitts Harold I.
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