HP 700 Series User Manual page 179

The key combinations that normally create extended
and international characters on the HP Jornada keyboard
(color-coded yellow symbols on selected keys) are not
available when typing in the TSC application. However,
you can still create these characters using special,
alternative keystroke combinations when you are typing in
a TSC session.
Using the alt key in conjunction with specific numeric key
combinations will produce these extended and
international text characters in a TSC session window.
The keyboard must be in NUMLOCK mode when pressing the
numeric keys indicated in these keyboard alternatives, and the
alt key and all of the indicated numeric keys must be
pressed to create the desired character.
Appendix C | Using the Keyboard in Terminal Server Client | 175