The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 1990
Filed:
Feb. 12, 1987
Michael A Orr, Raleigh, NC (US);
Chester L Storm, Hillsville, VA (US);
James M White, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An interface device called an adapter is provided for interconnecting data terminal equipment (DTE) to a communication highway. The adapter includes a plurality of command/status registers coupled through a decoding device to the data bus and control lines of a microprocessor. An Internal Modem Interface (IMI) circuit arrangement monitors the decoding device and command/status registers and depending on the contents of the command/status registers and/or the status of the signals on the interface the IMI enables/disables the receive and transmit logic functions of the adapter. The adapter also includes a circuit arrangement which monitors traffic or signals on the data highway without affecting the electrical characteristics of the traffic.