Radio telephone system having emergency speech control

Details Radio telephone system having emergency speech control Radio telephone system having emergency speech control

1990-01-08

1990-12-18

Ng, Jin F.

Telephonic communications

Emergency or alarm communications

Called line or station condition responsive

379 45, 379 58, H04Q 704

Patent

active

049792040

ABSTRACT:
A radio telephone system includes a subscriber exchanger accommodating a plurality of subscribers and a plurality of emergency call receiving devices each having a transmission function, a line exchanger interfacing with the subscriber exchanger, emergency speech office lines provided between the subscriber exchanger and the line exchanger, a plurality of channels coupling mobile stations and the line exchanger, and emergency speech extension lines coupled to the line exchanger and corresponding to the emergency speech office lines one by one.

REFERENCES:
patent: 4860337 (1989-08-01), Shimura
patent: 4890315 (1989-12-01), Bendixen et al.

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