I preferred to own my alarm equipment rather than "rent" from one of the big companies, and I had access to a good installer. So I bought equipment from "Home Technology Store" which promised e-mail tech support for purchases. I don't need much support, but I did have one question about the sounder wiring. The monitoring service they are reselling it turns out does not cover my area (the reseller took my $$$, not the alarm company).
You can probably guess what kind of a response I got to a query.
"If (name of alarm company) does not offer service your area, then you will have to contact them for a refund. For your siren trouble, please call us for technical support."
Moral of story: if you have a good installer you are set, but don't expect ANYTHING from someplace like Home Technology Store.
P.S. all I wanted to know was on an Ademco Vista 20P panel, if you make the sounders supervised by cutting one jumper as shown in the manual, where exactly should the resistor be placed. The manual implies the sounders are in series.
Sorry for the rant.