Two ways to obtain Telephony support for Linux.
a) The Linux community developes the software, but lack infrastructure requiered to provide this service.
b) Walk over to:
i - Dialpad
http://www.dialpad.com
Login and switch over to forums -- general and
provide posts directed to Dialpad requesting support for Linux
ii - Net2Phone
http://www.net2phone.com
use feed back to request support for Linux
iii - MSN
http://www.msn.com
this is the best of all, switch over to
http://explorer.msn.com/feedback.htm
under the option "What do you think we ..."
suggest that Linux support should be provided.
Alternatives for these products, not as good but work!
DIALOGIC, Voxilla, Gphone, Speak freely and Ehternet Phone, to name a few. Some of these cost money, once, but work great.