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TOLLGRADE COMMUNICATIONS INC
US32 patents
Top patents by PatentIndex Score
US4961218AOct 2, 1990
Enhanced line powered amplifier
TOLLGRADE COMMUNICATIONS INC107 citations96
US5982412ANov 9, 1999
Coaxial testing and provisioning network interface device
TOLLGRADE COMMUNICATIONS INC80 citations94
US6531879B1Mar 11, 2003
Method and apparatus for delay-line time-domain reflectometry
TOLLGRADE COMMUNICATIONS INC25 citations92
US5586181ADec 17, 1996
Metallic channel unit network
TOLLGRADE COMMUNICATIONS INC24 citations92
USD622583SAug 31, 2010
Line clamp
TOLLGRADE COMMUNICATIONS INC25 citations89
US6453015B1Sep 17, 2002
Telephony testing system
TOLLGRADE COMMUNICATIONS INC17 citations85
US9069009B2Jun 30, 2015
Power line takeoff clamp assembly
TOLLGRADE COMMUNICATIONS INC9 citations83
US8896291B2Nov 25, 2014
Power line takeoff clamp assembly
TOLLGRADE COMMUNICATIONS INC6 citations83
US9562925B2Feb 7, 2017
Power line management system
TOLLGRADE COMMUNICATIONS INC6 citations82
US7529347B2May 5, 2009
Test system for assessing DSL capability of telephone lines
TOLLGRADE COMMUNICATIONS INC10 citations81
US7515691B2Apr 7, 2009
Method for testing DSL capability of telephone lines
TOLLGRADE COMMUNICATIONS INC12 citations81
USD640537SJun 28, 2011
Line clamp
TOLLGRADE COMMUNICATIONS INC13 citations79
US6433905B1Aug 13, 2002
Frequency agile transponder
TOLLGRADE COMMUNICATIONS INC18 citations76
US5202919AApr 13, 1993
Metallic channel unit network
TOLLGRADE COMMUNICATIONS INC15 citations74
US7567520B2Jul 28, 2009
Apparatus and method of remotely enabling a special mode of operation of an endpoint in a VoIP network
TOLLGRADE COMMUNICATIONS INC18 citations70
US6738435B1May 18, 2004
Matched-filter frequency-shift-keyed receiver using degenerate digital signal processing techniques
TOLLGRADE COMMUNICATIONS INC16 citations70
US6320939B1Nov 20, 2001
Remote telephony testing device
TOLLGRADE COMMUNICATIONS INC9 citations70
US6574311B1Jun 3, 2003
Apparatus and method for detecting a bridged tap and/or an end-of-line of a conventional telephone line using delay-line time-domain reflectometry
TOLLGRADE COMMUNICATIONS INC9 citations69
US6285744B1Sep 4, 2001
Telephony test system with adjustable output impedance
TOLLGRADE COMMUNICATIONS INC14 citations66
US5457743AOct 10, 1995
Metallic channel unit network
TOLLGRADE COMMUNICATIONS INC3 citations63
US7356127B2Apr 8, 2008
Global digital measurement device
TOLLGRADE COMMUNICATIONS INC2 citations61
US6522723B1Feb 18, 2003
Telephony line test unit and method
TOLLGRADE COMMUNICATIONS INC5 citations61
US7653180B2Jan 26, 2010
Method for assessing DSL capability of telephone lines
TOLLGRADE COMMUNICATIONS INC2 citations60
US7235979B2Jun 26, 2007
Apparatus and method for measuring loop insertion loss single-endedly
TOLLGRADE COMMUNICATIONS INC4 citations58
US7529348B2May 5, 2009
Method of performing insertion loss estimation
TOLLGRADE COMMUNICATIONS INC4 citations54
US7436935B2Oct 14, 2008
Qualifying telephone lines for data transmission
TOLLGRADE COMMUNICATIONS INC1 citations51
US7602885B2Oct 13, 2009
Automatic provisioning of a telephone line test system
TOLLGRADE COMMUNICATIONS INC6 citations49
US7508218B2Mar 24, 2009
Apparatus and method for measuring loop insertion loss single-endedly
TOLLGRADE COMMUNICATIONS INC0 citations48
US7508219B2Mar 24, 2009
Apparatus and method for measuring loop insertion loss single-endedly
TOLLGRADE COMMUNICATIONS INC0 citations48
US6650732B2Nov 18, 2003
Telephony testing system
TOLLGRADE COMMUNICATIONS INC1 citations45
US7386039B2Jun 10, 2008
Method and apparatus for identifying faults in a broadband network
TOLLGRADE COMMUNICATIONS INC1 citations43
US7433323B2Oct 7, 2008
Remote testing of high speed data and voice communication networks
TOLLGRADE COMMUNICATIONS INC0 citations42