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:
Jun. 24, 2008
Filed:
Jul. 21, 2004
Wen Zhu, Shanghai, CN;
Wen Zhu, Shanghai, CN;
Agere Systems Inc., Allentown, PA (US);
Abstract
A method and apparatus for detecting the C-bit parity application of DS3 makes use of the relative state of the CP-bits and the P-bits in one or more M-frames alone or in combination with the state of the AIC signal. In one implementation, the invention is a detector circuit that is adapted to receive a CP-bit and a P-bit from each of a group of one or more M-frames of a DS3 service. For each M-frame in the group, the detector circuit performs a logical XOR between the CP-bit and the P-bit for that M-frame. The detector circuit further performs a logical OR between the XOR results from each M-frame in the group and outputs a C-bit parity format detect signal if the result is zero.