Browse Prior Art Database

Alpha Numeric Replacement Line Protocol Monitor

IP.com Disclosure Number: IPCOM000047803D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hockings, MA: AUTHOR

Abstract

For an aid in testing and debugging problems associated with ANR (Alpha Numeric Replacement) line protocol, a logic card is provided. This logic card allows a user to capture and store a number of 13-bit data/ control words from an ANR line. Visual output of the captured data and the card's operational status is provided by an LED (light-emitting diode) display unit. Connection to an ANR line is accomplished via a "Tee" connection in the coaxial cable between the display unit under investigation and the host/controller. An isolated DC supply is established on the card, permitting correct (isolated ground) ANR line interface to be accomplished. In one use, provision has been made to connect such a logic card to the Parallel Data Interface on an IBM Personal Computer thus allowing computer operation of the protocol monitor.

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Alpha Numeric Replacement Line Protocol Monitor

For an aid in testing and debugging problems associated with ANR (Alpha Numeric Replacement) line protocol, a logic card is provided. This logic card allows a user to capture and store a number of 13-bit data/ control words from an ANR line. Visual output of the captured data and the card's operational status is provided by an LED (light-emitting diode) display unit. Connection to an ANR line is accomplished via a "Tee" connection in the coaxial cable between the display unit under investigation and the host/controller. An isolated DC supply is established on the card, permitting correct (isolated ground) ANR line interface to be accomplished. In one use, provision has been made to connect such a logic card to the Parallel Data Interface on an IBM Personal Computer thus allowing computer operation of the protocol monitor. A simplified block diagram of the ANR line monitor is set out in the figure.

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