How does WAP work?
Basically the mobile WAP device is attached to the mobile network such as GSM, CDMA, etc. This then dials the modem which is attached to a dial-in server i.e. RAS, or Remote Access Service. This server gives the WAP device access to the protocols it needs. These are the same lower level protocols as a normal Internet Service Provider will give you. We call this the PPP or Point-to-Point Protocol.
Here is a diagram showing the basic working system of the WAP.
These protocols are used to access the next step in the chain, which is the WAP gateway. The WAP gateway is the link between the wireless and the wired world, basically giving the WAP device or the mobile phone the access to the common internet.