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Class Information
Number: 379/93.08
Name: Telephonic communications > Telephone line or system combined with diverse electrical system or signalling (e.g., composite) > Having transmission of a digital message signal over a telephone line > Transmission scheme (e.g., compression/decompression, transmission rate)
Description: Subject matter including a particular detail of a methodology in which the message signal is conveyed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5426694 |
Telecommunication switch having programmable network protocols and communications services |
Jun. 20, 1995 |
| 5418842 |
Reduced time remote access method |
May. 23, 1995 |
| 5410541 |
System for simultaneous analog and digital communications over an analog channel |
Apr. 25, 1995 |
| 5408520 |
Modem for tight coupling between a computer and a cellular telephone |
Apr. 18, 1995 |
| 5402473 |
Communication device and data transmitting method |
Mar. 28, 1995 |
| 5390239 |
Method for increasing digital data throughput over telephone lines |
Feb. 14, 1995 |
| 5386590 |
Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping |
Jan. 31, 1995 |
| 5365576 |
Data and speech transmission device |
Nov. 15, 1994 |
| 5353337 |
Device for the transmission of data by telephone line |
Oct. 4, 1994 |
| 5351288 |
Voice bridge for a relay center |
Sep. 27, 1994 |
| 5343515 |
High speed modem |
Aug. 30, 1994 |
| 5325423 |
Interactive multimedia communication system |
Jun. 28, 1994 |
| 5315640 |
Data transfer device |
May. 24, 1994 |
| 5311590 |
Protocol adaptation |
May. 10, 1994 |
| 5298921 |
System for communicating with external device registers via two-byte data packets over a serial bus |
Mar. 29, 1994 |
| 5289542 |
Caller identification system with encryption |
Feb. 22, 1994 |
| 5278862 |
Timing for spread-spectrum communication across noisy media |
Jan. 11, 1994 |
| 5276732 |
Remote workstation use with database retrieval system |
Jan. 4, 1994 |
| 5263081 |
Method and apparatus for providing on-hook transmission for digital loop carrier channel units |
Nov. 16, 1993 |
| 5228076 |
High fidelity speech encoding for telecommunications systems |
Jul. 13, 1993 |
| 5216704 |
Method for remote power fail detection and maintaining continuous operation for data and voice devices operating over local loops |
Jun. 1, 1993 |
| 5214650 |
Simultaneous voice and data system using the existing two-wire inter-face |
May. 25, 1993 |
| 5184345 |
Enhanced ISDN 800 service |
Feb. 2, 1993 |
| 5165091 |
Firmware download from a remote terminal to an optical network terminal in a digital loop carrier system |
Nov. 17, 1992 |
| 5140616 |
Network independent clocking circuit which allows a synchronous master to be connected to a circuit switched data adapter |
Aug. 18, 1992 |
| 5136586 |
Method and apparatus for telephone line multiplex channeling of toll-quality voice and digital information |
Aug. 4, 1992 |
| 5127051 |
Adaptive modem for varying communication channel |
Jun. 30, 1992 |
| 5081673 |
Voice bridge for relay center |
Jan. 14, 1992 |
| 5065425 |
Telephone connection arrangement for a personal computer and a device for such an arrangement |
Nov. 12, 1991 |
| 5062104 |
Digital service unit for connecting data processing equipment to a telephone system based computer network |
Oct. 29, 1991 |
| 5062136 |
Telecommunications system and method |
Oct. 29, 1991 |
| 5058163 |
Interface unit for transferring digital data between time-domain multiplexed communication links |
Oct. 15, 1991 |
| 5036513 |
Method of and apparatus for integrated voice (audio) communication simultaneously with "under voice" user-transparent digital data between telephone instruments |
Jul. 30, 1991 |
| 5031207 |
Method of establishing a data link between a pair of terminals as well as a terminal which is suitable for implementing this method |
Jul. 9, 1991 |
| 5001710 |
Customer programmable automated integrated voice/data technique for communication systems |
Mar. 19, 1991 |
| 4987573 |
Telephone system digital channel bank interface |
Jan. 22, 1991 |
| 4980911 |
Transient signal elimination circuit for telecommunications applications with CPU control means |
Dec. 25, 1990 |
| RE33380 |
Voiceband data set |
Oct. 9, 1990 |
| 4953210 |
Feature negotiation protocol for a synchronous modem |
Aug. 28, 1990 |
| 4924492 |
Method and apparatus for wideband transmission of digital signals between, for example, a telephone central office and customer premises |
May. 8, 1990 |
| 4910768 |
Automatic balancing circuit for longitudinal transmission system |
Mar. 20, 1990 |
| 4905282 |
Feature negotiation protocol and dynamically adjustable retraining sequence for a high speed half duplex modem |
Feb. 27, 1990 |
| 4903292 |
System for transmitting low frequency tones through a digital loop carrier system |
Feb. 20, 1990 |
| 4901344 |
Telephone system digital channel bank interface |
Feb. 13, 1990 |
| 4893340 |
Multijunction unit apparatus for use in a digital network |
Jan. 9, 1990 |
| 4890316 |
Modem for communicating at high speed over voice-grade telephone circuits |
Dec. 26, 1989 |
| 4885569 |
Method and device for transferring signals between modules of an electronic unit |
Dec. 5, 1989 |
| 4872198 |
Transient signal elimination circuit for telecommunications applications |
Oct. 3, 1989 |
| 4849811 |
Simultaneous audio and video transmission with restricted bandwidth |
Jul. 18, 1989 |
| 4837780 |
Transmit line buildout circuits |
Jun. 6, 1989 |
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