Erik A Walker

US Patent:

45531293, Nov 12, 1985

Filed:

Aug 5, 1983

Appl. No.:

6/520669

Inventors:

John B. McNesby - Mesa AZ
Erik K. Walker - Denver CO

Assignee:

GTE Communication Systems Corporation - Phoenix AZ

International Classification:

H03K 1324

US Classification:

340347DD

Abstract:

In a data transmission system, apparatus for converting a subrate binary data stream into a binary signal at the line transmission rate comprises means for periodically accepting a date byte from the subrate data stream and; means for expanding the data byte by one additional bit by adding a control bit in the first bit position of the accepting means. The apparatus additionally comprises means for recirculating the expanded data byte through the accepting means a predetermined number of times and means for serially reading out bits of the expanded data byte at the line transmission rate.