I just got back from a client with a 12 port A200... It seems that one of the FXO groups stopped detecting rings, and a quick call to Sangoma informed me that there is a bug in everything under beta12. Registers get full on the card, and then won't detect rings. It lasted about 3 weeks before dropping calls.
I was running Beta7 in production for a few weeks, fairly high volume, and this has been the first glitch. On another note, the A200's Echo is top notch.. I have had zero echo on the calls. Overall, it's a fantastic product, that I would easily use again. Chad
