Thread: How to access PC over router?

Hi there!
I am using TP-Link tl-740n wireless router. The problem is, that when ever I connect any device to the router and look for the internet IP of the same, each and every device is showing the same IP address over the internet. Let suppose I have connect two PC's with the router PC A and B. Both have an internet IP let say 192.168.1.1. My question is, if I want to create a telnet connection (or any other type of TCP connection) with my PC A from some remote computer not in my LAN, what IP address should I use?