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:
Aug. 03, 2010
Filed:
Aug. 22, 2008
Nobuhiko Kikuchi, Tokyo, JP;
Takao Fukushima, Funabashi, JP;
Naohiro Sakakida, Tokyo, JP;
Hiroyuki Nakano, Yokohama, JP;
Nobuhiko Kikuchi, Tokyo, JP;
Takao Fukushima, Funabashi, JP;
Naohiro Sakakida, Tokyo, JP;
Hiroyuki Nakano, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A signal speed converting apparatus to be connected to a WDM transmission end office, comprising a first interface connected to a first optical line group, a plurality of second interfaces connected to a second optical line group, and a speed converter. The first interface has a first framer for terminating a frame in a first format received from the first optical line group and outputting an information signal extracted from the received frames as a serial signal train or parallel signal trains. The speed converter converts the output signal from the first framer into transmission signal trains each including interleaved communication frame by cyclically distributing the output signal from the first framer to a plurality of internal lines. Each of the second interfaces has a second framer for converting the communication frame received from one of the internal lines into information frame in a second format to be transmitted to the second optical line group. Management information inserting units are located between the first and second interfaces in order to insert management information to be communicated with an opposite apparatus into the transmission signal trains on the internal lines.