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Class Information
Number: 379/31
Name: Telephonic communications > Diagnostic testing, malfunction indication, or electrical condition measurement > Testing of subscriber loop or terminal > Of line signalling generator (e.g., dial, tone code generator)
Description: Subject matter for testing or measuring a voice frequency signalling generator or an impulsing signal producing arrangement, in a terminal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7596112 |
Method and apparatus for rate compatible dirty paper coding |
Sep. 29, 2009 |
| 7590222 |
Techniques and apparatus for one way transmission delay measurement for IP phone connections |
Sep. 15, 2009 |
| 7587028 |
Method and apparatus for generating and playing diagnostic messages indicative of MTA provisioning status |
Sep. 8, 2009 |
| 7319863 |
Method and system for providing an opinion and aggregating opinions with mobile telecommunication device |
Jan. 15, 2008 |
| 7181004 |
Direct drive for a subscriber line differential ringing signal having a DC offset |
Feb. 20, 2007 |
| 7181003 |
Direct drive for a subscriber line differential ringing signal |
Feb. 20, 2007 |
| 6813340 |
Ringing SLIC fault handling |
Nov. 2, 2004 |
| 6775355 |
Line sharing multipoint POTS splitter masking noise |
Aug. 10, 2004 |
| 6711238 |
Parallel-connected dialing signal transmission inhibiting device for data transfer over a telephone link |
Mar. 23, 2004 |
| 6707886 |
Method and system for testing subscriber loops using touchtone telephone signals |
Mar. 16, 2004 |
| 6693992 |
Line probe signal and method of use |
Feb. 17, 2004 |
| 6466650 |
Telecom service identification transponder apparatus and technique |
Oct. 15, 2002 |
| 6377663 |
Call management system and associated method for a local telephone circuit |
Apr. 23, 2002 |
| 6298119 |
System and method for digital telephone trouble reporting |
Oct. 2, 2001 |
| 6263047 |
Apparatus and method for characterizing the loading pattern of a telecommunications transmission line |
Jul. 17, 2001 |
| 6253069 |
Methods and apparatus for providing information in response to telephonic requests |
Jun. 26, 2001 |
| 6233312 |
Inter-circuit line fault location in telecommunication networks |
May. 15, 2001 |
| 6154447 |
Methods and apparatus for detecting and locating cable failure in communication systems |
Nov. 28, 2000 |
| 6128370 |
Multiple tone detection using out-of-band background detector |
Oct. 3, 2000 |
| 5995557 |
Tone detection with aliasing bandpass filters |
Nov. 30, 1999 |
| 5937030 |
Off-hook signal and dial pulse generating circuit and a method for driving the same circuit |
Aug. 10, 1999 |
| 5898756 |
Parallel-connected dialing signal transmission-inhibiting device for data transfer over a telephone link |
Apr. 27, 1999 |
| 5881146 |
Method and apparatus for determining digits dialed using a selected algorithm |
Mar. 9, 1999 |
| 5818904 |
Collaborative trunk testing method and system |
Oct. 6, 1998 |
| 5809111 |
Telephone control module and user site network and methods of operation |
Sep. 15, 1998 |
| 5787147 |
Test message generator in a telecommunications network |
Jul. 28, 1998 |
| 5781611 |
Method and apparatus for monitoring status of speech connection between central office lines |
Jul. 14, 1998 |
| 5570418 |
Device for detecting operation state of telephone hook switch |
Oct. 29, 1996 |
| 5561700 |
Device for measuring analog telephony signals |
Oct. 1, 1996 |
| 5528663 |
DTMF detection for voice processing equipment |
Jun. 18, 1996 |
| 5528661 |
Diagnostic mechanism for monitoring operational status of remote monitoring and test unit which controllably test and conditions subscriber line circuits |
Jun. 18, 1996 |
| 5452339 |
Local/remote modification of electronically alterable operating system firmware resident in redundant flash memory of remote unit for testing/conditioning subscriber line circuits |
Sep. 19, 1995 |
| 5440609 |
Telephone tester junction box |
Aug. 8, 1995 |
| 5359646 |
Testing of distributed communications networks |
Oct. 25, 1994 |
| 5357556 |
System and method for telephone network testing |
Oct. 18, 1994 |
| 5357557 |
Inter-mobile-terminal testing method in cellular automobile telephone system |
Oct. 18, 1994 |
| 5307398 |
Remote controlled tone generator system |
Apr. 26, 1994 |
| 4777645 |
Telephone line test and display circuit |
Oct. 11, 1988 |
| 4656319 |
Alarm system tester |
Apr. 7, 1987 |
| 4602134 |
Telephone tester |
Jul. 22, 1986 |
| 4580016 |
Method and apparatus for checking the integrity of a communications channel in a voice store and forward system |
Apr. 1, 1986 |
| 4577072 |
Telephone equipment tester |
Mar. 18, 1986 |
| 4443669 |
Subscriber connection circuit |
Apr. 17, 1984 |
| 4398147 |
Methods of testing multifrequency dialing signals |
Aug. 9, 1983 |
| 4361730 |
Security terminal for use with two-way interactive cable system |
Nov. 30, 1982 |
| 4255623 |
Apparatus for pulse train measurement |
Mar. 10, 1981 |
| 4218589 |
Method and apparatus for testing tone generators |
Aug. 19, 1980 |
| 4119808 |
Multi-frequency receiver circuits |
Oct. 10, 1978 |
| 4095058 |
Telephone switching system test set |
Jun. 13, 1978 |
| 3997740 |
Pulse train analyzer |
Dec. 14, 1976 |
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