Radio telecommunication apparatus for use in radio telecommunica

Details Radio telecommunication apparatus for use in radio telecommunica Radio telecommunication apparatus for use in radio telecommunica

1996-01-24

1999-03-02

Cong-Le, Thanh

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455455, 455564, 455575, H04B 138

Patent

active

058783407

ABSTRACT:
When a vehicle radio telephone has transmitted a call signal, a base-station/control-station suspends the communication channel. After the base-station/control-station transmits a PIN transmission request signal to the vehicle radio telephone via the communication channel, a liquid crystal display 452 incorporated in the telephone displays a PIN transmission request. Operating a key section 430 in the telephone generates a flash operation signal. When the base-station/control-station has received the flash operation signal, it transmits a telephone number transmission request signal. At this time, the PIN transmission request on the display 452 is erased, and a PIN is read from an ID/ROM and a PIN code signal is transmitted. Upon receiving the PIN code signal, the base-station/control-station examines whether or not the PIN indicated by the PIN code signal identical to a registered one. If they are identical to each other, the vehicle radio telephone is connected to a destination with an already received telephone number. Thus, the PIN can be easily and reliably transmitted from the vehicle radio telephone to the base-station/control-station.

REFERENCES:
patent: 5101500 (1992-03-01), Marui
patent: 5384825 (1995-01-01), Dillard et al.
patent: 5551073 (1996-08-01), Sammarco

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