Hi, I need to develop an application (Windows 2000 PC based) to  
communicate (to collect data) with data loggers (which have gsm - via  
siemens TC45 cellular engine).

As far as I understand, there are three options for communications:
1. call from PC (using a gsm or normal modem) to
   the data logger (using TAPI or AT command set to dial out)
   (like HyperTerminal on Windows)
2. SMS
3. GPRS

Can anyone give ideas about how to implement GPRS communications support  
in my PC application?

Any ideas and or pointers to information would be greatly appreciated.

Also, Is it possible to initiate communications (via GPRS) from a PC via  
internet (i.e without using a GSM modem with GPRS support at the PC end)?

If yes, would GPRS MT (mobile terminate) be used for it? is it already  
supported by gsm networks?