thanks for your help, but i accidentaly stumbled on the awnser.
good luck is smiling upon me.
seems the default version of hyperterminal uses VT-1000 terminal keyboard emulation. this didn't accept the keystrokes from my laptop keyboard (hooked up a laptop to the callcenter) after downloading a freeware version of an extended hyperterminal it worked. (the freeware version used VT-330 (or was it 3300) terminal keyboard emulation wich worked perfectly.)
if anyone might be interested in this hyperterminal version :