Browse Prior Art Database

Method for Loop Communication

IP.com Disclosure Number: IPCOM000084117D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Gindi, AM: AUTHOR [+2]

Abstract

In the prior art, communication between a downstream loop terminal with an upstream loop terminal has always involved the time delay occasioned by regeneration of the message at the loop controller and retransmission on the line. Reference may be made to Maxemchuk et al, USP 3,879,710, where in addition to the loop controller, each terminal was required to regenerate and pass on data not intended for that terminal. Other ways of avoiding the loop controller participation have included elaborate poling and sequential switching arrangements as, for example, found in Fuller, USP 3,728,681.

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Method for Loop Communication

In the prior art, communication between a downstream loop terminal with an upstream loop terminal has always involved the time delay occasioned by regeneration of the message at the loop controller and retransmission on the line. Reference may be made to Maxemchuk et al, USP 3,879,710, where in addition to the loop controller, each terminal was required to regenerate and pass on data not intended for that terminal. Other ways of avoiding the loop controller participation have included elaborate poling and sequential switching arrangements as, for example, found in Fuller, USP 3,728,681.

The instant method comprises the steps of inserting a special character by the downstream terminal, in response to which the central station bypasses the message stream from its incoming port to its outgoing port. This special character switchable bypass thereby avoids the inherent regeneration and retransmission delay time.

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