Browse Prior Art Database

Communications Adapter

IP.com Disclosure Number: IPCOM000074021D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Roscoe, GS: AUTHOR [+2]

Abstract

In the communications adapter shown, the monitor 1 is mutually exclusive with respect to the transmitter 3, due to the chosen line discipline, and the monitor can therefore use common local storage and a common shift register to scan the hardware for test purposes. The normal connections between the data sets and the transmitter, receiver and monitor are shown by the dotted lines 5, 7, and 9, respectively.

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Communications Adapter

In the communications adapter shown, the monitor 1 is mutually exclusive with respect to the transmitter 3, due to the chosen line discipline, and the monitor can therefore use common local storage and a common shift register to scan the hardware for test purposes. The normal connections between the data sets and the transmitter, receiver and monitor are shown by the dotted lines 5, 7, and 9, respectively.

To test the monitor itself a transmitter-to-monitor wrap is used, as indicated by the solid connections 11 and 13. A message sent by the transmitter 3 is received by the monitor 1, using the local storage associated with the receiver, which is not then in operation.

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