Synchronous coupling of framed data in digital transmission

Details Synchronous coupling of framed data in digital transmission Synchronous coupling of framed data in digital transmission

1980-11-14

1983-11-15

Curtis, Marshall M.

Multiplex communications

Wide area network

Packet switching

370 93, H04J 1300

Patent

active

044160097

ABSTRACT:
A synchronization system for data coupling apparatus is provided by delaying clocked frame identification signals instead of delaying the data in data buffer storage. Data is passed between input and output transmission lines with only the inherent delay incurred in the requisite data manipulation therebetween. The framing alignment information extracted at the input is connected to the output through a delay such that the data and framing identification signals arrive at the output at the same time and in synchronous alignment. In addition to eliminating the need for a data buffer, the system also eliminates the need for a second identification bit alignment location derivation from the output. The system utilizes an edge-aligned clock which enables substitutional insertion of data to a desired location in the bit stream.

REFERENCES:
patent: 2701305 (1955-02-01), Hopper
patent: 3760109 (1973-09-01), Kogo et al.
patent: 4164628 (1979-08-01), Ward et al.

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