oh, silly me :)  thank you Wasim.

I still would like to know if anybody tried to use an atcom ax-4s with freeswitch because someone wants to bring me one for testing so...
(kind of out of curiosity... and for reference purposes)

-Milena 

2010/7/14 Wasim Baig <wasim@convergence.pk>
Sangoma AFT A500 comes from 2 to 24 port BRI (4 to 48 B channels).
The A502 is a 4 BRI (8 B-Channel) card.