Telephone system port communication method and apparatus

Details Telephone system port communication method and apparatus Telephone system port communication method and apparatus

1986-06-06

1987-11-17

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082508, 34082554, H04Q 100

Patent

active

047076941

ABSTRACT:
There is disclosed a port communication method and apparatus for controlling system controller communications with port circuits of the system. The port communication apparatus generates commands to port module interfaces, interposed between the controller and port circuits, in a predetermined order and receives acknowledgement signals therefrom. Thereafter, the port interfaces concurrently collect data from the associated port circuits and transmit this data in response to a subsequent read command from the port communication apparatus. In one embodiment the port communication apparatus includes a programmable microcode routine which generates the commands using input parameters which are specified in various registers and in the microcode program call.

REFERENCES:
patent: 3702008 (1972-10-01), Groth
patent: 4010452 (1977-03-01), Cazanove
patent: 4149144 (1979-04-01), Diefenderfer
patent: 4173754 (1979-11-01), Feiker
patent: 4306287 (1981-12-01), Huang
patent: 4539676 (1985-09-01), Lucas
patent: 4546468 (1985-10-01), Christmas et al.
"Minicomputer Systems Structure, Implementation, and Application" Cay Weitzman, pp. 66-70.

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