I cannot tell you how anxious I was as I prepared to initially power up my new ELK M1G, M1EXP Ethernet interface, M1DBH data hub, and CADDX NX448E 48 zone wireless interface. I ran Cat 5 bulk cable to the keypad so I had to put on a RJ45 end to connect it to the data hub. I also ran bulk Cat 5 to the foyer closet where the CADDX NX448E is located. I turned on the system - WOW! It works! No problem! I programmed the control to disable wired zones 1-16, enroll the NX448E, learn a wireless contact. I started up the M1XEP Ethernet interface and the ELK RP software and son of a gun, everything is flying! The phone still works after connecting the RJ31X jack (I have not yet tested the control dialing out). What a neat hardware/software system! My thanks to Martin at AO and to all on this forum who answered my endless questions and made this experience absolutely enjoyable. I still need to install and set up my ZWave interface and to install a wired smoke detector as well as to get all of my wireless detectors positioned. The system has been up for several hours now and I do not smell any smoke nor are any circuits tripping. Neat!