Importance

Loading Importance Indicators...

Abstract

A personal communication apparatus is disclosed, which comprises a radio transmitter 64 and a radio receiver 66 for participating in communication, a microphone 60, a loudspeaker 61, a processor 90 as a controller for controlling call switching communication and packet switching communication, a ROM 100 and a RAM 101 for storing control programs and data, a call switching modem 80 for modulating signal in the speech frequency band, and a packet switching modem 82 for modulating signal in a frequency band exceeding the speech frequency band. The outputs of the microphone 60 and call switching modem 80 are bandwidth limited by a transmission signal processing circuit 72. Communication by the packet switching modem is carried out according to a communication program. The apparatus is capable of stand alone call switching communication and also of packet switching communication, as well as functioning as a radio telephone set.

Loading the Abstract Image...

First Claim