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Class Information
Number: 398/3
Name: Optical communications > Fault recovery > Bypass inoperative element > In a ring or loop
Description: Subject matter wherein the inoperative element is in a closed path transmission system.

Sub-classes under this class:

Class Number Class Name Patents
398/4 Using a secondary ring or loop 160

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8712235 Transmission apparatus and network protection method Apr. 29, 2014
8649683 Light path characterization, traffic protection, and wavelength defragmentation Feb. 11, 2014
8634715 System and method for demand aggregation in optical networks employing shared ring protection Jan. 21, 2014
8606100 WDM-TDM PON remote terminal and WDM-TDM PON link protection system Dec. 10, 2013
8606101 Optical channel intelligently shared protection ring Dec. 10, 2013
8554080 Failsafe optical splitter and method to isolate faults in a passive optical network Oct. 8, 2013
8553534 Protecting an ethernet network having a ring architecture Oct. 8, 2013
8532481 Dual fault tolerant optical networking with fast protection performance Sep. 10, 2013
8457488 Technology for providing telecommunication services to multiple optical communication lines Jun. 4, 2013
8447181 Method and apparatus for displaying and identifying available wavelength paths across a network May. 21, 2013
8433190 Hot-swapping in-line optical amplifiers in an optical network Apr. 30, 2013
8433191 Optical channel intelligently shared protection ring Apr. 30, 2013
8417112 Protection switching in WDM rings using a shared ring switch Apr. 9, 2013
8417114 Apparatus, system and method for network monitoring Apr. 9, 2013
8412042 Innovative architecture for fully non blocking service aggregation without O-E-O conversion in a DWDM multiring interconnection node Apr. 2, 2013
8396361 Method for the protection of a passive optical transmission network as well as a passive optical transmission network with a corresponding protection mechanism Mar. 12, 2013
8391182 User isolation between network devices Mar. 5, 2013
8391707 Maintenance friendly optical fiber switching system Mar. 5, 2013
8339940 Multi-active detection method and stack member device Dec. 25, 2012
8326143 Routing method of optical communication network node apparatus and optical communication network node apparatus Dec. 4, 2012
8320757 Method and device for starting up an optical transmission link Nov. 27, 2012
8280244 Optical ring network system Oct. 2, 2012
8264954 Method and device for operating a network and communication system comprising such device Sep. 11, 2012
8254409 User isolation between network devices Aug. 28, 2012
8218965 Optical failover routing Jul. 10, 2012
8213790 Method and device for the 1+1 protection of an optical transmission path Jul. 3, 2012
8200084 Encoding for information needed for routing and wavelength assignment in wavelength switched optical networks Jun. 12, 2012
8160441 Optical fiber access network and commuication protection method thereof Apr. 17, 2012
8150257 Shared mesh restoration with pre-configured standby lightpaths Apr. 3, 2012
8145054 Single-fiber protection in telecommunications networks Mar. 27, 2012
8116623 Multi-ring network operating method and system Feb. 14, 2012
8103161 Method, device and system for group optical channel shared protection Jan. 24, 2012
8090256 Optical network architectures and optical communication schemes Jan. 3, 2012
8064763 Optical transmission systems, devices, and methods Nov. 22, 2011
8041210 Parallel high-speed communication links with redundant channel architectures Oct. 18, 2011
8019217 Storage system and optical module switching method for storage system Sep. 13, 2011
8018841 Interworking an ethernet ring network and an ethernet network with traffic engineered trunks Sep. 13, 2011
8000606 Method for processing overheads of optical communication system and signal processing device Aug. 16, 2011
7995920 Optical network terminal power failure management Aug. 9, 2011
7970278 Flexible open ring optical network and method Jun. 28, 2011
7957270 Resilient packet ring protection over a wavelength division multiplexing network Jun. 7, 2011
7945157 Ship with a data network May. 17, 2011
7933517 Single-fiber protection in telecommunications networks Apr. 26, 2011
7925155 Transmitting broadcast signals in a communication network Apr. 12, 2011
7925126 Fiber sensing system with self-detection mechanism Apr. 12, 2011
7920786 Single-fiber protection in telecommunications networks Apr. 5, 2011
RE42095 Method for transferring utility optical signals and optical-line network Feb. 1, 2011
7860391 Highly resilient architecture for DWDM networks providing 1+1 optical Channel Protection Dec. 28, 2010
7856182 Optical CWDM-system Dec. 21, 2010
7848642 Method and apparatus for capacity-efficient restoration in an optical communication system Dec. 7, 2010

1 2 3 4

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