Modular communication system having self-identifying modules

Details Modular communication system having self-identifying modules Modular communication system having self-identifying modules

1977-10-31

1979-02-06

Robinson, Thomas A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

179 15BF, 3401461C, H04M 124

Patent

active

041385993

ABSTRACT:
Trunk and line circuits packaged as modules are provided with circuitry for generating self-identifying type-code information which is retrievable on request by the central control unit of the system. The received information is compared with the type-code information contained in the data memory of the central control unit. Upon non-correlation between the received and the stored type-code information, an alarm signal is generated. In the described embodiment, the type-code information generating circuitry on each board comprises a voltage level source individual of the type of board and an analog to digital converter circuit associated with the board.

REFERENCES:
patent: 3922490 (1975-11-01), Pettis
patent: 3943348 (1976-03-01), Akriche
patent: 4041455 (1977-08-01), Norberg
Western Electric Technical Digest, No. 26, 4-1972, "Testing System Utilizing a Resistor in a Plug in Module Specifically to Identify the Unit," Comeau, p. 21.

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