tom j: According to the manual, the only time the light comes on, that is set to the same House/Unit Code as the console, is when arming in delay mode. However, a few have mentioned that this light comes on for a second when arming with the keychain remote (immediate mode). Is there a firmware difference between various production builds (?) See the undocumented changes with the various date codes of the Lamp Module.
The listen in feature has been strategically camouflaged by X10 as a message example in "
Storing a Voice Message" Page 15, sentence # 3.
When "0" is pressed, only the built in siren stops during the phone call. Any external power horns will continue to blare in the background. There are no other features controlled by pressing phone buttons. Having said that, I wouldn't be surprised if there are undocumented features available throughtout the different date codes. Experimentation is the real document.