Dialer with internal option select circuit programmed with exter

Details Dialer with internal option select circuit programmed with exter Dialer with internal option select circuit programmed with exter

1988-10-31

1990-01-23

James, Andrew J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3074651, 307303, 3073031, H03K 1901, H03K 326

Patent

active

048960608

ABSTRACT:
An option select circuit for a dialer includes an internal address generator (20) for generating an address pattern, which, in a set up mode, is output from a multiplexer (14) to I/O pins (10). The pins (10) are selectively hardwired through an interface circuit (24) back to address input pins (50) and (52) for input to a decorder (28). The decoder (28) decodes the selected address for input to a PLA (30). This allows selection of various functions in a function generator (12) for operation in the normal dialer mode. The interface circuit (24) comprises hardwire connections (54) and (56).

REFERENCES:
patent: 4742252 (1988-05-01), Agrawal
patent: 4757794 (1986-03-01), Veneski et al.
patent: 4791602 (1988-12-01), Resnick
patent: 4791603 (1988-12-01), Henry
patent: 4818902 (1989-04-01), Brockmann
patent: 4831573 (1989-05-01), Norman
patent: 4835414 (1989-05-01), Freidin

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