I have both a Nokia DKU-5 cable & a PL2303 clone DKU-5 cable.
Nokia PC Suite 5.05, installed on my wife's laptop, works but
only with the Nokia DKU-5 cable. Unfortunately, Nokia's deal
with Verizon ensures that PC Suite is useless for my needs - see
my
Verizon rant
for more "information".
I am now using Slackware 10 updated with kernel 2.4.28
I downloaded gammu-0.99.0 & need to try it. Gammu has been
"sorta" working because I've been able to extract stuff from the
phone, but I haven't actually modified my phonebook & sent it
back to the phone yet. That's coming soon...