At my current job we currently use a way over priced termail emulator to connect to our HP-UX (unix) server. This emulator supports vt320 emulation which is needed to use the function keys which is setup as shortcuts for our staff. The software is very outdated and to renew would be very expensive. Seeing that I am a big fan of putty I have been advocating a switch to it but ran into some problems during some testing, mainly the function keys would not work. I knew it had to be the emulation. After a bit of tweaking I got the function keys to work and in the end saveing the company a 10k in licensing fees.
For the function keys to work properly for Unix servers using VT320 emulation adjust your putty with the following changes in the configuration:
Under the “Terminal” -> “Keyboard” window set the “Function keys and keypad” section to VT400.
The next setting to be changed is terminal details.
Under the “Connection” -> “Data” window set the “Terminal-typing string” section to vt320.
After that is set just save your setting.
**If you have issues with the backspace just change keyboard setting for the backspace to “Control-H”