The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
Sep. 27, 1990
Applicant:
Inventor:
John B McNesby, Mesa, AZ (US);
Assignee:
Siemens Communication Systems, Inc., Boca Raton, FL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375116 ; 370106 ;
Abstract
A frame detection circuit for SONET which operates in both the OC-3 and OC-12 modes. The frame detection circuit operates by examining the incoming data bit stream, detecting A1 and A2 bytes, and counting three consecutive A1 bytes immediately followed by three consecutive A2 bytes. Since the counters recycle upon reaching a three count, the circuit works for both the OC-3 and OC-12 modes.