Patent assignee · US · COMPANY

Westell Technologies, Inc.

🏢 View company profile →
22Patents
3Active
22Granted
35Portfolio score

Filing activity: Mar 12, 1998 → Aug 12, 2010 · 3 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US7218722B1 System and method for providing call management services in a virtual private network using voice or video over internet protocol Electricity 122 Expired
US6181775A Dual test mode network interface unit for remote testing of transmission line and customer equipment Electricity 78 Expired
US6278769A Signaling method for invoking a test mode in a network interface unit Electricity 76 Expired
US6718030B1 Virtual private network system and method using voice over internet protocol Electricity 53 Expired
US7305006B1 System for allowing a single device to share multiple transmission lines Electricity 43 Expired
US6144735A Filters for a digital subscriber line system for voice communication over a telephone line Electricity 36 Expired
US6137880A Passive splitter filter for digital subscriber line voice communication for complex impedance terminations Electricity 30 Expired
US6212258A Device for remotely testing a twisted pair transmission line Electricity 27 Expired
US6115466A Subscriber line system having a dual-mode filter for voice communications over a telephone line Electricity 21 Expired
US7092375B2 Modem having flexible architecture for connecting to multiple channel interfaces Electricity 16 Expired
US6477250B1 Adjustable hybrid having dial tone alignment configuration Electricity 12 Expired
US7565079B2 System and method for optical network demarcation Electricity 6 Active
US7406117B2 XDSL multi-hybrid modem with power spectral density shaping Electricity 5 Expired
US7360137B2 Flash programmer for programming NAND flash and NOR/NAND combined flash Physics 5 Active
US7076030B2 Method and system for testing XDSL wiring Electricity 5 Expired
US7106854B2 XDSL system having selectable hybrid circuitry Electricity 4 Expired
US6453432B1 Method and system for communicating the status of a digital transmission line element during loopback Electricity 3 Expired
US8346808B2 System and method of accessing resources in a computer network Electricity 2 Active
US7301894B1 Method for providing fault tolerance in an XDSL system Electricity 1 Expired
US7145943B2 XDSL system with improved impedance circuitry Electricity 1 Expired
US6188763A Signal processing unit for network interface unit Electricity 0 Expired
US6359527B1 Determining waveshaper attenuation settings for network interface unit Electricity 0 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.