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Class Information
Number: 379/22.01
Name: Telephonic communications > Diagnostic testing, malfunction indication, or electrical condition measurement > Of trunk or long line > By loopback
Description: Subject matter including transmitting a known signal from a testing location over a communication path to a second remote location which retransmits the known signal back to the testing location for use in evaluating the transmission path or a device are the remote location.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620155 |
Method and apparatus for automated asymmetric digital subscriber line loop testing |
Nov. 17, 2009 |
| 7609817 |
Termination circuit for network interface unit |
Oct. 27, 2009 |
| 7539148 |
Circuit integrity in a packet-switched network |
May. 26, 2009 |
| 7529349 |
Automated telephone line test apparatus with intelligent diagnostic function |
May. 5, 2009 |
| 7453989 |
Method and apparatus for testing a subscriber loop-based service |
Nov. 18, 2008 |
| 7440421 |
Detection of looping communication channels |
Oct. 21, 2008 |
| 7426262 |
Method and arrangement for loop test of a disturbed line |
Sep. 16, 2008 |
| 7356127 |
Global digital measurement device |
Apr. 8, 2008 |
| 7356471 |
Adjusting sound characteristic of a communication network using test signal prior to providing communication to speech recognition server |
Apr. 8, 2008 |
| 7298828 |
Automated telephone line test apparatus with intelligent diagnostic function |
Nov. 20, 2007 |
| 7245701 |
System and method for verifying central office wiring associated with line sharing |
Jul. 17, 2007 |
| 7200206 |
Method and apparatus for testing a subscriber loop-based service |
Apr. 3, 2007 |
| 7177395 |
Electronic looping systems for telecommunications system central offices |
Feb. 13, 2007 |
| 7099439 |
Loop test apparatus and method |
Aug. 29, 2006 |
| 7082299 |
Testing loops for channel codecs |
Jul. 25, 2006 |
| 7054273 |
Circuit integrity in a packet-switched network |
May. 30, 2006 |
| 7042984 |
Method for inspecting transmission channels in a communications system having peripheral modules |
May. 9, 2006 |
| 7027389 |
Fast failure detection using RTT time considerations on a non-retransmit medium |
Apr. 11, 2006 |
| 7028235 |
Test method and test circuit for electronic device |
Apr. 11, 2006 |
| 7013257 |
Communication transmission impairment emulator |
Mar. 14, 2006 |
| 7003098 |
Method and system for measurement of the delay through a network link bounded by an echo canceller |
Feb. 21, 2006 |
| 6985560 |
Apparatus and method for enabling automatic measurement of performance in a telephony communication system |
Jan. 10, 2006 |
| 6959069 |
Method for testing subscriber line of private automatic branch exchange using dual-tone multi-frequency signal |
Oct. 25, 2005 |
| 6917595 |
Telecommunications transmission test set |
Jul. 12, 2005 |
| 6915250 |
Customer premises simulation for a service provider |
Jul. 5, 2005 |
| 6901358 |
Communication media simulation for a service provider |
May. 31, 2005 |
| 6898557 |
System and method for remote testing of components |
May. 24, 2005 |
| 6898272 |
System and method for testing telecommunication devices |
May. 24, 2005 |
| 6891851 |
Method and apparatus for communicating maintenance messages and/or test messages of digital subscriber line services |
May. 10, 2005 |
| 6879827 |
Testing a communication network with a shared test port |
Apr. 12, 2005 |
| 6873623 |
System and method for overlaying DSL access multiplexer onto existing access systems |
Mar. 29, 2005 |
| 6867707 |
Automated on-site meter registration confirmation using a portable, wireless computing device |
Mar. 15, 2005 |
| 6798866 |
System and method for verifying central office wiring associated with line sharing |
Sep. 28, 2004 |
| 6792080 |
System and method for testing enhanced 911 signalling over a digital loop carrier trunk |
Sep. 14, 2004 |
| 6775240 |
System and methods for measuring quality of communications over packet networks |
Aug. 10, 2004 |
| 6762675 |
Method and apparatus for remote powering of device connected to network |
Jul. 13, 2004 |
| 6748050 |
Method and apparatus for performing either tone analysis on a local looped-back communications path or utilizing a hybrid reflection based looped-back test to test integrity |
Jun. 8, 2004 |
| 6731738 |
Call tones in communication networks |
May. 4, 2004 |
| 6721541 |
Wireless telephone testing using an echo plug |
Apr. 13, 2004 |
| 6711136 |
Code-based filtering mechanism for reducing data-induced latching loopback in digital data service device |
Mar. 23, 2004 |
| 6693991 |
Priority auto-control method of signal routes in No. 7 signaling network |
Feb. 17, 2004 |
| 6657971 |
ISDN PRI loop detection and correction |
Dec. 2, 2003 |
| 6643291 |
Multimedia information communication system |
Nov. 4, 2003 |
| 6643266 |
Method for qualifying a loop for DSL service |
Nov. 4, 2003 |
| 6640318 |
Continuity testing in communication networks |
Oct. 28, 2003 |
| 6631339 |
Data path evaluation system and method |
Oct. 7, 2003 |
| 6580782 |
Interactive telephone response module |
Jun. 17, 2003 |
| 6556661 |
In-line telephony data protector with line condition announce |
Apr. 29, 2003 |
| 6501830 |
Method of and device for measuring echo parameters on telephone lines |
Dec. 31, 2002 |
| 6480576 |
Method and device for detecting path faults in a network |
Nov. 12, 2002 |
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