Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1988-03-17
1988-11-29
Ng, Jin F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 93, 379441, H04M 1100
Patent
active
047887176
ABSTRACT:
36 Telephone interface option module circuit for interfacing an electronic device to a telephone network. Most electronic devices, for example, modems, telephone message systems and text-to-speech systems, when coupled to a telephone network must conform to specific telephone interconnect regulations. These regulations generally vary from country to country, and therefore, the electronic device generally has to be modified to conform to a specific countries telephone regulations. The option module circuit contains the country specific telephone regulations, and when plugged into the electronic device, ensures that the electronic device conforms to those regulations.
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"A Peripheral-Sharing Interlinked Mini-Computer System" by Kelley The Radio and Electronic Engineer, vol. 46, No. 2, pp. 76-82--Feb. 1976.
Blanchard Dennis R.
Bruckert Edward A.
Conroy David G.
Ellison Richard D.
Vitale Anthony J.
Chan Wing Fu
Digital Equipment Corporation
Meller Michael N.
Ng Jin F.
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