Connect to Remote Site

I need a solution for my up coming project, I need to make PC (A) and PC (B) talk to each other (access on demand) via “wireless solution”.

PC (B) is at a remote location with only power supply, and PC (B) is running on custom OS with Tel. of LANconnection option.

PC (A) have access all comms.

PC (A) and PC (B) is about 2KM apart with road in between them.

Have think of using Nokia D211, but PC using custom OS not able to support.

Please Help! Thanks in advance.