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Class Information
Number: 379/93.34
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 > By voice frequency signal (e.g., tone code) > Modulated audio tone > Protocol > Having recognition and selection
Description: Subject matter including determination of one of a plurality of modulator-demodulator types and for connecting to a compatible type.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7587034 |
Use of modem on hold for network management and telephone access |
Sep. 8, 2009 |
| 7542787 |
Apparatus and method for providing hands-free operation of a device |
Jun. 2, 2009 |
| 7471671 |
Band signal detection and presentation for IP phone |
Dec. 30, 2008 |
| 7400714 |
Communication device and management server |
Jul. 15, 2008 |
| RE40057 |
Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network |
Feb. 12, 2008 |
| 6925158 |
Modem function incorporated in a programmable logic controller |
Aug. 2, 2005 |
| 6888933 |
Communication apparatus for selecting a communication protocol compatible to a partner station and executing the selected protocol |
May. 3, 2005 |
| 6594350 |
Dial on demand communication |
Jul. 15, 2003 |
| 6539086 |
System and method for completing two calls using analog interface to telephone network |
Mar. 25, 2003 |
| 6519336 |
Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network |
Feb. 11, 2003 |
| 6487197 |
Method and apparatus for connecting to a packet based communication system |
Nov. 26, 2002 |
| 6456715 |
Connecting a telephone |
Sep. 24, 2002 |
| 6427007 |
System and method for completing a call while at least one call is established using analog interface to telephone network |
Jul. 30, 2002 |
| 6411695 |
System and method for completing two calls using analog interface to telephone network |
Jun. 25, 2002 |
| 6304574 |
Distributed processing of high level protocols, in a network access server |
Oct. 16, 2001 |
| 6298121 |
Method and apparatus for making a voice and/or data call over a single analog phone line using a multi-modal DCE |
Oct. 2, 2001 |
| 6289087 |
Modem with ring detection/modem processing capability |
Sep. 11, 2001 |
| 6222910 |
System and method for connecting and interfacing a communications device to a telephone line via a telephone set |
Apr. 24, 2001 |
| 6173044 |
Multipoint simultaneous voice and data services using a media splitter gateway architecture |
Jan. 9, 2001 |
| 6163596 |
Phonebook |
Dec. 19, 2000 |
| 6081587 |
Modem with ring detection/modem processing capability |
Jun. 27, 2000 |
| 6038294 |
Method and apparatus for configuring a modem capable of operating in a plurality of modes |
Mar. 14, 2000 |
| 5946304 |
Method and apparatus for controlling the operation of a modem capable of transmitting and receiving both voice and data signals |
Aug. 31, 1999 |
| 5917895 |
Adjunct arrangement for a telecommunication device |
Jun. 29, 1999 |
| 5915002 |
Communication device |
Jun. 22, 1999 |
| 5898764 |
Data communication apparatus |
Apr. 27, 1999 |
| 5864605 |
Voice menu optimization method and system |
Jan. 26, 1999 |
| 5835574 |
Dual-tone multi-frequency signal transfer protocol |
Nov. 10, 1998 |
| 5835578 |
Modem with ring detection/modem processing capability |
Nov. 10, 1998 |
| 5822404 |
System and method for identifying remote communications formats |
Oct. 13, 1998 |
| 5815288 |
Facsimile apparatus with changeable transmission energy level and transmission speed |
Sep. 29, 1998 |
| 5809085 |
Apparatus and method for detecting and discriminating various signal types in the presence of impulse distortions |
Sep. 15, 1998 |
| 5805679 |
Communication device with automatic signal discrimination and method therefor |
Sep. 8, 1998 |
| 5802471 |
Mobile communication system, automatic call receiving method, and mobile station |
Sep. 1, 1998 |
| 5796808 |
System and method for automatically selecting the mode of communication between a plurality of modems |
Aug. 18, 1998 |
| 5751796 |
Rapid startup protocol for communication between a plurality of modems |
May. 12, 1998 |
| 5696600 |
Modem device for use with a facsimile machine combined with a PC |
Dec. 9, 1997 |
| 5684825 |
Independently switched voice and data calls using a simultaneous voice and data modem |
Nov. 4, 1997 |
| 5606599 |
Method and apparatus for automatically converting from an analog voice mode to a simultaneous voice and data mode for a multi-modal call over a telephone line |
Feb. 25, 1997 |
| 5577105 |
Telephone call routing and switching techniques for data communications |
Nov. 19, 1996 |
| 5535016 |
Station combining a minitel-type videotex terminal with a facsimile machine |
Jul. 9, 1996 |
| 5506891 |
Method and apparatus for detecting the connection status of an extension phone connected to a voice/fax/data modem |
Apr. 9, 1996 |
| 5473675 |
Call establishment for simultaneous analog and digital communications |
Dec. 5, 1995 |
| 5471522 |
Telephone line sharing for a personal computer system |
Nov. 28, 1995 |
| 5446771 |
Adaptive coherent signal detection method and apparatus |
Aug. 29, 1995 |
| 5440619 |
Voice, data and facsimile modem with modified ringback answering |
Aug. 8, 1995 |
| 5349635 |
Half-duplex or full-duplex automode operation for use in data communications equipment |
Sep. 20, 1994 |
| 5220560 |
Modem pool system based on a packet communication procedure |
Jun. 15, 1993 |
| 5199071 |
Modem mode matching method with PBX dial-in |
Mar. 30, 1993 |
| 5153897 |
Automatically controlling the operation mode of data circuit terminating equipment in a communication system |
Oct. 6, 1992 |
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