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Network Configuration

IP.com Disclosure Number: IPCOM000090768D
Original Publication Date: 1969-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Leclere, G: AUTHOR [+3]

Abstract

As a consequence of increasing speed on a transmission network, it is necessary to equalize different line segments. The solution of such a problem has led to rearranging the usual configuration, drawing A, of a network in which polling characters are sent from a terminal towards those which precede it on the line. In drawing A, line 1 operates normally and various terminal receivers R can be equalized. Complete equalization is impossible since a transmitter T of a terminal is emitting on line 2 towards the master or towards any of the other terminals, for a polling character. Similarly, the polling character receiver R' of a terminal can receive signal coming from different sources.

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Network Configuration

As a consequence of increasing speed on a transmission network, it is necessary to equalize different line segments. The solution of such a problem has led to rearranging the usual configuration, drawing A, of a network in which polling characters are sent from a terminal towards those which precede it on the line. In drawing A, line 1 operates normally and various terminal receivers R can be equalized. Complete equalization is impossible since a transmitter T of a terminal is emitting on line 2 towards the master or towards any of the other terminals, for a polling character. Similarly, the polling character receiver R' of a terminal can receive signal coming from different sources.

In drawing B, receiver R' always receives polling through line 2' from a same transmitter T" and can be equalized. Transmitters T are emitting on line 2 always towards receiver R of the master or towards receiver R4 of the repeater. Consequently, it is possible to equalize each one for transmission to R and to obtain an approximate equalization for transmission towards R" since R" and T" are necessarily very near the master.

In drawing B', equalization problems for transmission towards R" do not exist since receiver R is suppressed. The receiver R of the master acts in so far as R" through the addition of junction X and of complementary transmitter T'. Such a circuit enables a complete equalization with minimum hardware.

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