Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1988-11-18
1991-03-26
Ng, Jin F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 98, 379161, 379442, H04M 1100, H04M 100
Patent
active
050035819
ABSTRACT:
A control and switching unit used with at least two devices for transmitting information or voice communication over telephone lines. The control and switching unit is provided with a series of relays to ensure that only one of the devices receives or transmits information at any one time. A timing circuit is utilized such that if one of the devices is a telephone, the second device would not be able to gain access to the telephone line if the telephone is ringing. Additionally, if the telephone is in use, the secondary device, such as a modem, could be selected and this secondary device would gain access to the telephone line after the use of the telephone has been discontinued.
REFERENCES:
patent: 3517137 (1970-06-01), Ribner
patent: 3524935 (1970-08-01), Gonsewski et al.
patent: 3591725 (1971-07-01), Morse et al.
patent: 3647993 (1972-03-01), Foulkes et al.
patent: 3852575 (1974-12-01), Daniels et al.
patent: 4009342 (1977-02-01), Fahrenschon et al.
patent: 4367374 (1983-01-01), Serrano
patent: 4640988 (1987-02-01), Robinton
patent: 4805210 (1989-02-01), Griffith, Jr.
patent: 4807278 (1989-02-01), Ross
patent: 4809317 (1989-02-01), Howe et al.
patent: 4821312 (1989-04-01), Horton et al.
patent: 4825465 (1989-04-01), Ryan
patent: 4850008 (1989-07-01), Berg et al.
patent: 4856049 (1989-08-01), Streck
patent: 4887290 (1989-12-01), Dop et al.
MacBride, G. et al., "Remote Computer Power-On Via Switched Telephone Network", IBM Tech. Disclosure, vol. 25, No. 6, Nov. 1982, p. 3064.
"Data Switch", Teleconnect, Feb. 1988, p. 153.
Chan Wing F.
Ng Jin F.
LandOfFree
Telephone line priority sharing device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telephone line priority sharing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone line priority sharing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-623507