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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 |
| 4873715 |
Automatic data/voice sending/receiving mode switching device |
Oct. 10, 1989 |
| 4856049 |
Single line compatible fax system |
Aug. 8, 1989 |
| 4852151 |
Modem with call waiting |
Jul. 25, 1989 |
| 4847892 |
Dial-in data transmission system with standby capability |
Jul. 11, 1989 |
| 4837808 |
Circuit connecting a voice-controlled device to a telephone station and line |
Jun. 6, 1989 |
| 4825465 |
Exclusionary device for coupling plural telephonic devices to a single central office trunk |
Apr. 25, 1989 |
| 4823373 |
Line switching control system for mobile communication |
Apr. 18, 1989 |
| 4821312 |
Voice/data switch |
Apr. 11, 1989 |
| 4809317 |
Telephone line exclusion device |
Feb. 28, 1989 |
| 4807278 |
Telecommunication controller having a telephone line sharing function |
Feb. 21, 1989 |
| 4805210 |
Automatic telephone line sharing and lockout apparatus |
Feb. 14, 1989 |
| 4805208 |
Modem compression system for telephone network |
Feb. 14, 1989 |
| 4800439 |
Data communication apparatus adapted to perform data communication and speech communication |
Jan. 24, 1989 |
| 4754473 |
Remote telephonic data transcribing system |
Jun. 28, 1988 |
| 4747127 |
Customer programmable real-time system |
May. 24, 1988 |
| 4742536 |
Telephone monitor circuit and method |
May. 3, 1988 |
| 4727575 |
State control for a real-time system utilizing a nonprocedural language |
Feb. 23, 1988 |
| 4723268 |
Dual mode phone line interface |
Feb. 2, 1988 |
| 4700378 |
Data base accessing system |
Oct. 13, 1987 |
| 4695977 |
Control of real-time systems utilizing a nonprocedural language |
Sep. 22, 1987 |
| 4689814 |
External device interface for an electronic telephone |
Aug. 25, 1987 |
| 4685123 |
Communication system having voice and data capability |
Aug. 4, 1987 |
| 4680788 |
Microprocessor based control and switching device |
Jul. 14, 1987 |
| 4660218 |
Apparatus for switching telephone line a response device, a data terminal or a telephone |
Apr. 21, 1987 |
| 4596021 |
Modem for switching between voice and data communications on a single telephone call |
Jun. 17, 1986 |
| 4578537 |
Telecommunication apparatus serving as an interface between a digital computer and an analog communication medium |
Mar. 25, 1986 |
| 4578534 |
Time independent data transmission system |
Mar. 25, 1986 |
| 4535198 |
Digital terminal keyboard dialing |
Aug. 13, 1985 |
| 4535199 |
Data call transfer preindication |
Aug. 13, 1985 |
| 4532377 |
Data call transfer |
Jul. 30, 1985 |
| 4524244 |
Digital and voice telecommunication apparatus |
Jun. 18, 1985 |
| 4506111 |
Text mailing system using a telephone line |
Mar. 19, 1985 |
| 4488003 |
Data communication system |
Dec. 11, 1984 |
| 4488002 |
Line control of switched network data sets |
Dec. 11, 1984 |
| 4471489 |
Automatic answer/originate mode selection in modem |
Sep. 11, 1984 |
| 4469917 |
Time synchronized data transmission system |
Sep. 4, 1984 |
| 4425625 |
Diagnostic display terminal system |
Jan. 10, 1984 |
| 4421951 |
Method and arrangement for signaling the transmission mode of a communication system |
Dec. 20, 1983 |
| 4392023 |
Off-hook telephone sensing system |
Jul. 5, 1983 |
| 4368358 |
Loop sharing in digital systems |
Jan. 11, 1983 |
| 4367374 |
Modem telephone interface circuit |
Jan. 4, 1983 |
| 4366347 |
Apparatus for selecting terminal equipment in telephone lines |
Dec. 28, 1982 |
| 4350848 |
Data transmission system |
Sep. 21, 1982 |
| 4321429 |
Apparatus for selecting terminal equipment in telephone lines |
Mar. 23, 1982 |
| 4313176 |
Data controlled switch for telephone inputs to a computer |
Jan. 26, 1982 |
| 4306116 |
Communications unit for voice and data |
Dec. 15, 1981 |
| 4291200 |
Voice and data switching arrangement |
Sep. 22, 1981 |
| 4288662 |
Circuit arrangement for telephone exchange systems, especially subscriber extension station installations, with additional data traffic, for example with teleprinter equipment |
Sep. 8, 1981 |
| 4277646 |
Apparatus and method for resetting data sets |
Jul. 7, 1981 |
| 4224478 |
Data transmission circuit for establishing a bidirectional data path in a telephone system |
Sep. 23, 1980 |
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