Dual mode cellular telephone apparatus

Details Dual mode cellular telephone apparatus Dual mode cellular telephone apparatus

1991-04-15

1993-07-13

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

455 331, 455 88, H04M 1100, H04O 700, H04B 140

Patent

active

052280748

ABSTRACT:
Dual mode cellular telephone apparatus for communicating in analog or digital modes. A portable unit adapted to communicate substantially only in an analog mode is operable to transmit voice signals supplied from an audio input to a cellular base station and to couple voice signals received from a cellular base station to an audio output. The portable unit, which is capable of operating as a stand alone device, is connectable to a mobile unit adapted to communicate in both analog and digital modes with the cellular base station. When the units are connected, voice signals pass through the mobile unit to and from the portable unit for communication with the base station. A control unit determines whether the mobile unit operates in an analog mode or a digital mode.

REFERENCES:
patent: 4837800 (1989-06-01), Freeburg et al.
patent: 4870696 (1989-09-01), Yorita
patent: 4921464 (1990-05-01), Ito et al.
patent: 5029233 (1991-07-01), Metroka
patent: 5119397 (1992-06-01), Dahlin et al.

Affiliated with

Also associated with

Rating

Dual mode cellular telephone apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual mode cellular telephone apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual mode cellular telephone apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2318713