Hi all i am trying to set up a Lancom 1724 with newest LCOS Bios and 3CX. Well, i cant use the Lancom as "Gateway" and i dont know why, so after 3hours of trying all possible connection settings, i decided to use VoIP Users to connect to the Lancom instead. It is a bit cumbersome, but it works. (you need one line per ISDN MSN/VoIP Number and you need to set up group calling on the lancom etc.) The first problem: if the lancom resets itself or i change the config of the lancom, the line isn't registered anymore - and it does not re-register itself automatically. Selecting the line and registering it manualy solves the problem... the second problem, which i think is not related to the 3cx, is that i enabled group calling on the Lancom, but the phones registered on the 3cx wont ring. If i set it up in the way that the number receiving the call is only the one on the 3cx, it works. any help..also instructions to use the lancom as a Gateway... would be highly apreciated..