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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 5708663 · Granted Jan 13, 1998

Estimated economic value: $18,479,000 ⓘ

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