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Electronic Document Distribution Utilizing Word Processing Equipment; SDLC Idle Detection

IP.com Disclosure Number: IPCOM000045747D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hall, LE: AUTHOR

Abstract

When conventional text processing equipment is linked together or linked into an electronic document distribution network, the hardware available in such word processor for participation in a communication network is of ten quite limited. For example, it may be the case that the hardware necessary to implement the SDLC (synchronous data link control) protocol necessary for a particular electronic document distribution network is quite limited. In the present expedient, this problem is solved to some extent by using hardware in the text processor which has a different optional function but is now not being used for that function.

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Electronic Document Distribution Utilizing Word Processing Equipment; SDLC Idle Detection

When conventional text processing equipment is linked together or linked into an electronic document distribution network, the hardware available in such word processor for participation in a communication network is of ten quite limited. For example, it may be the case that the hardware necessary to implement the SDLC (synchronous data link control) protocol necessary for a particular electronic document distribution network is quite limited. In the present expedient, this problem is solved to some extent by using hardware in the text processor which has a different optional function but is now not being used for that function.

For example, the SDLC link protocol requires that the primary station have the capability of detecting an idle condition prior to issuing a repoll. An idle condition is defined as 15 contiguous binary "1"s in the data stream, which, of course, is indicative that nothing is happening, i.e., there are no transition binary bits. It was found that a particular piece of text processing equipment had available hardware which could have been optionally utilized whenever the particular text processor was in asynchronous communication mode. Since asynchronous communication is not utilized in SDLC linkages, such asynchronous hardware would be idle. In accordance with the present expedient, such unused hardware was used for determining the idle condition requir...