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:
Mar. 13, 2007
Filed:
Jun. 14, 2002
Jayanta Das, Morganville, NJ (US);
Ganesh Lakshminarayana, Plainsboro, NJ (US);
Kuo-ming Lee, Morganville, NJ (US);
Roman Antosik, Colts Neck, NJ (US);
Scott Kaminski, Highlands, NJ (US);
Jithamithra Sarathy, Atlantic Highlands, NJ (US);
Boris Stefanov, Gillette, NJ (US);
Ronald Simprini, Red Bank, NJ (US);
Bharat Dave, Howell, NJ (US);
Jayanta Das, Morganville, NJ (US);
Ganesh Lakshminarayana, Plainsboro, NJ (US);
Kuo-Ming Lee, Morganville, NJ (US);
Roman Antosik, Colts Neck, NJ (US);
Scott Kaminski, Highlands, NJ (US);
Jithamithra Sarathy, Atlantic Highlands, NJ (US);
Boris Stefanov, Gillette, NJ (US);
Ronald Simprini, Red Bank, NJ (US);
Bharat Dave, Howell, NJ (US);
Alphion Corporation, Princeton Junction, NJ (US);
Abstract
Method and apparatus are presented for the generation and detection of maintenance signals in an optical data network. The maintenance signals are such that they can be read both by high bit-rate and low bit-rate receivers. Detection of the maintenance signals occurs in two stages. In a low bit-rate first stage each nodal input port is sampled in a round robin fashion to detect the presence of a maintenance signal. In a high bit-rate second stage the maintenance signal is verified and read by a high speed receiver, along with other high bit-rate information transmitted with it. One second stage high speed receiver is shared among M input channels for cost and circuit efficiency.