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Class Information
Number: 714/714
Name: Error detection/correction and fault detection/recovery > Pulse or data error handling > Transmission facility testing > By tone signal
Description: Subject matter which includes application of a test signal composed of one or more tone signals.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617431 |
Method and apparatus for analyzing delay defect |
Nov. 10, 2009 |
| 7539148 |
Circuit integrity in a packet-switched network |
May. 26, 2009 |
| 7519002 |
Method of switching between multiple call signaling protocol stacks in a voice quality tester and apparatus using same |
Apr. 14, 2009 |
| 7480839 |
Qualified anomaly detection |
Jan. 20, 2009 |
| 7471932 |
System and method for embedding OFDM in CDMA systems |
Dec. 30, 2008 |
| 7320115 |
Method for identifying a physical failure location on an integrated circuit |
Jan. 15, 2008 |
| 7299388 |
Method and apparatus for selectively accessing and configuring individual chips of a semi-conductor wafer |
Nov. 20, 2007 |
| 7296209 |
Apparatus for encoding and decoding |
Nov. 13, 2007 |
| 7200691 |
System and method for efficient DMA transfer and buffering of captured data events from a nondeterministic data bus |
Apr. 3, 2007 |
| 7155658 |
CRC calculation for data with dynamic header |
Dec. 26, 2006 |
| 7054273 |
Circuit integrity in a packet-switched network |
May. 30, 2006 |
| 6950972 |
Multi-purpose BER tester (MPBERT) for very high RZ and NRZ signals |
Sep. 27, 2005 |
| 6941262 |
Poet assistant's graphical user interface (GUI) |
Sep. 6, 2005 |
| 6904550 |
Velocity enhancement for OFDM systems |
Jun. 7, 2005 |
| 6813741 |
Address counter test mode for memory device |
Nov. 2, 2004 |
| 6798830 |
Methods and apparatus for generating a test signal for xDSL devices |
Sep. 28, 2004 |
| 6640318 |
Continuity testing in communication networks |
Oct. 28, 2003 |
| 6584580 |
Processor and multiprocessor system |
Jun. 24, 2003 |
| 6563867 |
Arrangement for analyzing the nonlinear properties of a communication channel |
May. 13, 2003 |
| 6499126 |
Pattern generator and electric part testing apparatus |
Dec. 24, 2002 |
| 6434716 |
Network link tester device configured to selectively and automatically couple to a network transmit pair line or a node transmit pair line of a LAN port and determine available operational mod |
Aug. 13, 2002 |
| 5463633 |
Use of at commands to test modem with HP3065 |
Oct. 31, 1995 |
| 5363493 |
Token ring network test device using finite state machine |
Nov. 8, 1994 |
| 5337306 |
Digital tandem channel unit interface for telecommunications network |
Aug. 9, 1994 |
| 5161151 |
System and method for controlling multiplex communications between master station and slave stations |
Nov. 3, 1992 |
| 5138609 |
Automatic channel switching from fallback channels to regular channels |
Aug. 11, 1992 |
| 4979506 |
Self-test system and method for external programming device |
Dec. 25, 1990 |
| 4918623 |
Testing the performance of a communication line between two modems using modem processor |
Apr. 17, 1990 |
| 4807274 |
Telephone line quality testing system |
Feb. 21, 1989 |
| 4633411 |
Link quality analyzer |
Dec. 30, 1986 |
| 4630268 |
Communication circuit loopback test apparatus |
Dec. 16, 1986 |
| 4606044 |
Adjusting data transmission rate based on received signal quality |
Aug. 12, 1986 |
| 4546473 |
Random pattern self test design |
Oct. 8, 1985 |
| 4539683 |
Method and apparatus for checking analog-to-digital converters, digital-to-analog converters, or telecommunications transmission links which contain such converters |
Sep. 3, 1985 |
| 4417337 |
Adaptive multitone transmission parameter test arrangement |
Nov. 22, 1983 |
| 4413335 |
Fault recovery apparatus for a PCM switching network |
Nov. 1, 1983 |
| 4410986 |
Error and status detection circuit for a digital regenerator using quantized feedback |
Oct. 18, 1983 |
| 4352182 |
Method of and device for testing the quality of digital speech-transmission equipment |
Sep. 28, 1982 |
| 4301536 |
Multitone frequency response and envelope delay distortion tests |
Nov. 17, 1981 |
| 4176317 |
Circuit arrangement for determining the frequency dependent amplitude fluctuation characteristic of a communications transmission link |
Nov. 27, 1979 |
| 4105995 |
Digitally controlled transmission impairment measuring apparatus |
Aug. 8, 1978 |
| 4071704 |
Service generator checking apparatus |
Jan. 31, 1978 |
| 4025854 |
In-service technique for measuring transmission characteristics of a microwave radio link |
May. 24, 1977 |
| 4009356 |
Data modems having data drop-out and data echo protection |
Feb. 22, 1977 |
| 4001559 |
Programmable measuring |
Jan. 4, 1977 |
| 3943305 |
Telephone line control system |
Mar. 9, 1976 |
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