Have one wired smoke detector (i3 SYS4WTA-B) attached. No phone line attached to M1. Powered down to install a wired motion detector when I powered up the M1 the wired smoke detector beeped like it should and the phone line became seized and will not release even with a power cycle. Deleted the smoke detector in software and the M1 no change. This happened before but the only way to correct this was to start a new account and doing a lot of copying. Does anyone have a better work around for this problem. Seems to only be a problem with smoke to M1.