Frederick Electronics Corporation

John F Wilson

John J Bowerman

Marvin K Perlman

Jack L Woodell

John W Spaniol

Larry C Bieber

William A Moshier

Philip K Hammond

Edward D Hoover

A distributed processing telex switch having different levels of processor control to handle the calls between terminations connected to the exchange is disclosed. A common control processor occupies the highest level of processor control and function as the system-wide manager. Next below common control is a plurality of master control processors which function to switch the command data between common control and the lower levels of processor control, and to handle the conversation data generated by each of the terminations connected to the exchange. Each master control processor controls a predetermined number of termination from among all of the terminations connected to the exchange. Connected to each master control processor is a plurality of group control processors which control the flow of data to and from a second predetermined number of terminations from among the terminations controlled by each master control processor. The group control processors occupy the next lower level of processor control from the master control level. Associated with each group control processor is a line control processor that cooperates with its associated group control processors to produce the signaling sequences in the terminations and to handle the conversation data from and to the terminations. The line control processor occupy the lowest level of processor control.

Distributed processing telex exchange

In a Telex switching system line terminator unit having means to transmit a character from the terminator to its terminal, in which the character is transmitted in a serial mode and terminated by a stop bit, an improvement in the manner of generating the stop bit is provided. A variable length stop bit is dynamically generated for each character transmitted such that the length of the stop bit is changed as the time required by the calling terminal to transmit the character to its terminator unit decreases over that required by the called terminator unit to transmit the character to the called terminal. Patterns in the rate of transfer of characters from the calling terminator unit to the called terminator unit are monitored to control the length of the stop bit.

Pseudo-transparent stop bit generator

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Frederick, MD, United States of America

John F Wilson