Mode S questoin

I thought regardless of discrete code, mode S always transmitted the code
assigned to each US registered A/C. However, I remember hearing that ATC
does not have the equipment required to do anything with the mode S code.

"Viperdoc" wrote in message
...
If squawking 1200 with a mode S transponder does ATC automatically see
your
N number on their radar? (Assuming you are flying in a mode S environment)

How about if you are assigned a discrete code- will your N number come up
then without their having to enter the numbers?

"JerryK" wrote in message ...
I thought regardless of discrete code, mode S always transmitted the code
assigned to each US registered A/C. However, I remember hearing that ATC
does not have the equipment required to do anything with the mode S code.

The ground radar can select the kind of reply it wants, but the common one is
a 56bit message with the discrete code, the altitude, and the mode S address.