How asterisk communicate to GSM mobiles

Hi to all !

Can anybody help me in knowing that how asterisk communicate with GSM

Mobile .

I will thankful if u give me answer in step.



I have a nokia mobile connected to a Dock n Talk device which then connects
to an fxo module on my digium tdm400 card.

Search for dock n talk on google.

I run 7 dock n talks on asterisk but I did have to order them from the USA.
Also I had to set the fxo port to usa for the caller id to work.

Hope this helps.