MIKROTIK!!!!!????? Could you shed some light. I just got off the phone with a Sangoma lead tech, and he said they offered to work with you to get their A10x series cards compatible. Come on, Cyclades pc300 is no longer in production, and none are available, Sangoma S5417/8 cards are no longer in production and in limited supply, and from what I hear SBE cards are getting harder and harder to come by. I've NEVER even seen a Moxa card for sale, so our options are limited. Please give us more options for T1/E1 interfaces!