Loosing my connection with ip line (Broadvox)

[unitechsys]

I been using this quadro 2x for 10 months , and suddenly since 2 days ago it keeps droping the invites from my IP line (Broadvox) so i can not make or accept calls, i go in over the Internet reset the unit and it goes on line again it last for around 4-5 hours and then it happens again , do the reset and back to work any suggestions, on how to fix this, any help would be greatly appreciated .
Also I do not know what this meand in the Systems events , please help

New Thu Mar 31 12:37:40 2011 1 MG rejected by cac System capability exceeded *

This is probably part of the problem but I don't know what it means or how to fix it

Thanks

[hrant]

it can be the reason of the problem. Please contact your distributor or Epygi's technical support. They will need the system logs from Quadro downloaded after the call failed by the "...cac ... System capability exceeded" reason.