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Home › ISDN terminal adapter for use with external modem and employing software-based serial communication framing for ISDN `D` channel signaling

ISDN terminal adapter for use with external modem and employing software-based serial communication framing for ISDN `D` channel signaling

US Patent 5903572 · Granted May 11, 1999

Estimated economic value: $12,057,000 ⓘ

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