Pulse or digital communications – Repeaters – Testing
Patent
1984-04-12
1986-06-17
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
179 2DP, 3701101, H04J 317, H04M 1106
Patent
active
045960216
ABSTRACT:
The present invention relates to a modem that allows the user to switch back and forth between voice and data telecommunications during the same phone call without redialing. Such switching back and forth between voice and data telecommunications is accomplished by lifting the telephone handset for voice communications and replacing the telephone handset for resumption of data communications. The present invention also allows a local user to communicate with a remote user via a speaker at the remote modem location without the remote user picking up the remote handset.
REFERENCES:
patent: 3517137 (1970-06-01), Ribner
patent: 4356348 (1982-10-01), Smith
"Intelligent Telephone", Sederholm and Van den Berg, IBM Technical Disclosure Bulletin, vol. 23, No. 9, Feb. '81, pp. 4006-4008.
Carter Kelly
Gallagher Steve
Iverson Gregory
Krechmer Kenneth R.
Glenny Raymond C.
Prentice Corporation
Safourek Benedict V.
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