Hi there, Anyone using a Fritzbox? I have two telephones installed one in each socket, both sockets have two separate sipgate accounts for in-coming calls and two separate out going accounts on Voipcheap and the other justvoip, all works well when used separately, but I I'm on a call on one off the lines and try to call the other line from another phone I get a engaged to on the other line, even though the device is supposed to support two seperate line, any ideas, Bob