Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1987-12-08
1989-06-20
Dwyer, James L.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379355, H04M 126, H04M 1100
Patent
active
048415618
ABSTRACT:
A modem which is provided with the operating parameters of a plurality of countries and can be made compatible with the country in which the modem is to be used is provided. The universal modem generally comprises: a receiver for receiving signals communicated over a communications channel; a transmitter for transmitting signals out over a communications channel; a ROM for storing the predetermined values of a plurality of operating parameters for a plurality of countries; a non-volatile RAM for receiving and storing in predetermined locations the operating parameters for the country in which the modem is to be used; and a microprocessor connected to the receiver, transmitter, ROM and RAM, for processing received signals and sending relevant information to a data terminal, for obtaining signals from a data terminal, processing the obtained signals, and sending relevent information to the data transmitter, and for obtaining parameter values stored in te RAM thereby permitting the modem to function in accord with the operating parameter requirements of the country in which the modem is to be used. The operating parameters may be software oriented such as the maximum number of redial attempts of a stored number until a first delay, a second delay or forbidden stats is imposed, or hardwar oriented such as the required line impedance.
REFERENCES:
patent: 3885108 (1975-05-01), Zock
patent: 4473720 (1984-09-01), Hegi
patent: 4741029 (1988-04-01), Hase et al.
Dwyer James L.
General Datacomm, Inc.
Gordon David P.
LandOfFree
Operating default group selectable data communication equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Operating default group selectable data communication equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operating default group selectable data communication equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-531243