[LINK] No cash for phone alert system

[Bernard Robertson-Dunn]

Jan Whitaker wrote:
> At 10:12 AM 18/02/2009, Pilcher, Fred wrote:
>   
>> The POMs have, and have had for some time, a system that overrides the
>> car radio's "off" button for emergency announcements.
>>     
>
> huh. Must be a safety requirement in the radios themselves to allow 
> that. As long as there is power in the car, there would be some sort 
> of signal trigger perhaps?
>   
It's the Enhanced Other Networks (EON) feature of the Radio Data System 
(RDS).
http://www.radio-now.co.uk/faq1.htm

-- 
 
Regards
brd

Bernard Robertson-Dunn
Canberra Australia
brd at iimetro.com.au