F2 isn't working on a PDT 814x PPC2003 in Telnet
First look at the keyboard map for the PDT 814x device. It tells you that Function, 0, 2 is the normal sequence for a F2. Then looking at the scan code for the Clear key and it is 001b, which is Escape. So, Clear, 2 also works as a F2 by default. You can go one step further and make a Key Macro, 001B:\001BOQ. Now you can simply press one key, Clear, and get the F2 functionality.