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Class Information
Number: 379/93.09
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 > Switching between different terminal types (e.g., voice/data switch)
Description: Subject matter including an arrangement for selecting between diverse communication modes.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5553122 |
Universal wedge-type telephone adaptor for computer system |
Sep. 3, 1996 |
| 5535265 |
Method and circuitry for controlling voice mail, call logging and call blocking functions using a modem |
Jul. 9, 1996 |
| 5519767 |
Voice-and-data modem call-waiting |
May. 21, 1996 |
| 5517557 |
Facsimile apparatus with automatic telephone answering function |
May. 14, 1996 |
| 5493609 |
Telecommunication system for automatic switching between voice and data communications |
Feb. 20, 1996 |
| 5491744 |
Selective call waiting |
Feb. 13, 1996 |
| 5491721 |
Modem powering method and apparatus |
Feb. 13, 1996 |
| 5490210 |
Programmable telephone interface device |
Feb. 6, 1996 |
| 5473676 |
Telephone handset interface for automatic switching between voice and data communications |
Dec. 5, 1995 |
| 5473675 |
Call establishment for simultaneous analog and digital communications |
Dec. 5, 1995 |
| 5455859 |
Telephone handset interface for device having audio input |
Oct. 3, 1995 |
| 5444770 |
Telephone handset interface for automatic switching between voice and data communications |
Aug. 22, 1995 |
| 5437555 |
Remote teaching system |
Aug. 1, 1995 |
| 5392334 |
Off-hook detection and soft line seizure for telephone line sharing in a computer system |
Feb. 21, 1995 |
| 5377260 |
Telephone circuit to control off-hook status during receipt of caller-ID signal |
Dec. 27, 1994 |
| 5365577 |
Telecommunication display system |
Nov. 15, 1994 |
| 5351288 |
Voice bridge for a relay center |
Sep. 27, 1994 |
| 5317629 |
Data communication apparatus connectable with a plurality of telephone sets and a telephone line |
May. 31, 1994 |
| 5291545 |
Apparatus and method for determining the state of a telephone line |
Mar. 1, 1994 |
| 5287401 |
Apparatus and method for a modem for detecting a call waiting signal |
Feb. 15, 1994 |
| 5267301 |
Data communication apparatus and method capable of discriminating calling stations |
Nov. 30, 1993 |
| 5263869 |
Interactive group communication system |
Nov. 23, 1993 |
| 5239580 |
Modem-telephone coupler |
Aug. 24, 1993 |
| 5206898 |
Transmission control unit |
Apr. 27, 1993 |
| 5202915 |
Single line communication apparatus for speech and data and method therefor |
Apr. 13, 1993 |
| 5185783 |
Communication apparatus for detecting a calling signal from a line, for detecting a data communication signal from a calling station, and for generating a quasi-calling tone |
Feb. 9, 1993 |
| 5164982 |
Telecommunication display system |
Nov. 17, 1992 |
| 5144650 |
Communication apparatus having improved switching line connection between different signal paths |
Sep. 1, 1992 |
| 5128985 |
Communication system having a plurality of voice communication terminals and a data communication terminal |
Jul. 7, 1992 |
| 5086453 |
Apparatus for communicating data via a telephone |
Feb. 4, 1992 |
| 5081673 |
Voice bridge for relay center |
Jan. 14, 1992 |
| 5070523 |
Private automatic business exchange |
Dec. 3, 1991 |
| 5038373 |
Process for determining whether a subscriber is the calling or the called party |
Aug. 6, 1991 |
| 5038372 |
Systems for transmitting data via telephone lines |
Aug. 6, 1991 |
| 5036534 |
Intelligent telephone interface for automatic answering systems, and method of using |
Jul. 30, 1991 |
| 5023903 |
Voice and data telecommunications apparatus |
Jun. 11, 1991 |
| 5022071 |
Two-way voice & digital data analyzer for telephones |
Jun. 4, 1991 |
| 5014299 |
Modem coupler for multi-line key telephone system |
May. 7, 1991 |
| 5005199 |
Telephone interface circuit |
Apr. 2, 1991 |
| 5003581 |
Telephone line priority sharing device |
Mar. 26, 1991 |
| 5003580 |
Adapter for interfacing a work station terminal to a key telephone system |
Mar. 26, 1991 |
| 5001744 |
Communication system having a first and second communication procedures |
Mar. 19, 1991 |
| 4995074 |
Switched line modem interface system |
Feb. 19, 1991 |
| 4995073 |
Communication apparatus and communication system having automatic attribution switching |
Feb. 19, 1991 |
| 4989235 |
Integrated communication system for ensuring effective use of channels |
Jan. 29, 1991 |
| 4987586 |
Modem-telephone interconnect |
Jan. 22, 1991 |
| 4987588 |
Data transmission processing machine |
Jan. 22, 1991 |
| 4972462 |
Multimedia mail system |
Nov. 20, 1990 |
| 4939777 |
Terminal apparatus having a function for preventing unnecessary line connection |
Jul. 3, 1990 |
| 4907267 |
Modem interface device |
Mar. 6, 1990 |
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