Dial inbound meter interface unit which derives power from telep

Details Dial inbound meter interface unit which derives power from telep Dial inbound meter interface unit which derives power from telep

1996-07-08

1999-11-09

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Remote indication over telephone line

H04M 1100

Patent

active

059828625

ABSTRACT:
The invention is a dial inbound MIU which includes a rechargeable power supply, such as a double layer capacitor (sometimes called a "supercapacitor" or a "SuperCap") or a rechargeable battery. The power supply can be recharged from the telephone line, either from the DC current available when the phone line is on-hook or off-hook or from the AC current which is available when the telephone line is ringing.

REFERENCES:
patent: 5204896 (1993-04-01), Oliver
patent: 5235634 (1993-08-01), Oliver
patent: 5454031 (1995-09-01), Gray et al.

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