GSM WORLD

> The signal is a frequency signal so , i believe this should be easy to
> do ?

> I am trying to get advice on the best way to produce a device that can
> activate its self , by way of a mobile phone signal.
>
> I trying to design an external device for disabled people , that if
> near to a mobile phone can pick up and recieve the same signal that is
> making the phone ring and and activate the device into its own process
> .
>
> The signal is a frequency signal so , i believe this should be easy to
> do ?
>
> Can anyone tell me if this is possible , and also The main world GSM
> frequencies .
>
> Im working on the principal of radio type frequencies and gsm signal
> working the same - ommiting from transmitter and being picked up by
> device antenna .
>
> Please can anyone help me - and explain a way for me to do this .
>
> is it basic electronics or complicated

> douis@aol.com (Jason Regler) wrote in message

>
>
> If you are refering to picking up the radio signal from the base
> station that informs the phone that there is an incoming call - then
> it would be impossible.

> Bob wrote:
> > douis@aol.com (Jason Regler) wrote in message
news:...
>
> >
> >
> > If you are refering to picking up the radio signal from the base
> > station that informs the phone that there is an incoming call - then
> > it would be impossible.
>
> Not impossible , just very, very difficult. The handset/SIM combination
> manages it, so it cant be impossible :-)

> True. Though you could build a device that would respond to the signal
> *emitted* by a mobile when it receives a call. If its insensitive
> enough it would respond only to a nearby phone - say 1m or so away - so
> would have a limited amount of selectivity. In fact such devices
> already exist - for Xmas I was given a very amusing Rudolph the
> Red-nosed Reindeer hat for my mobile which has a red nose that flashes
> when a nearby mobile receives (or makes) a call.

> Tony Walton wrote in message
> news:3F6EF1D8.2080907@s-u-n.com...
>
>>Bob wrote:
>>
>>>douis@aol.com (Jason Regler) wrote in message
>>
> news:...
>
>>>
>>>If you are refering to picking up the radio signal from the base
>>>station that informs the phone that there is an incoming call - then
>>>it would be impossible.
>>
>>Not impossible , just very, very difficult. The handset/SIM combination
>> manages it, so it cant be impossible :-)
>
>
> But hardly cost effective for the OPs requirements (unless he works for
> MI-5 or the CIA, in which case hed hardly be asking here ;-))