I had a ton of headaches with the "newer" 10-15 year old stuff. Constant
battery issues, interference from othe sources blocking transmitters, and
its a pain to change the batteries.
While I recognixze that Inovonics and ITI have some pretty darn good
wireless, I have to say I've had absolutely the least trouble with Napco
wireless in normal uses. I've got some huge houses running with a single
centrally located receiver that have worked flawlessly for the life of the
transmitter batteries for about 5 years now. Then they only indicate low
battery and don't go flaky.
I've had the same experience. As I've mentioned before, I always do a
preliminary transmitter/receiver placement survey first, to make sure
all locataion are giving me a 6 or higher signal strength. I do this
because on a few of my first installs, after a period of time, when
going back on a call, I'd noticed that some of the previously higher
readings had dropped. Probably just from things that had changed on
the job. So now, if I start at a 6, there's not much that could bring
it below the minimum of 3.
I just added 6 more transmitters to a 64 transmitter job the other
day. Been installed about 5 years now with only low battery troubles.
I do have two receivers though.
When Napco first came out with their wireless, I was speaking with one
of their engineers. He said that they'd really done their homework on
the wireless before releasing it. He said they'd used ITI as their
guide. I can truthfully say that except for a few transmitters with
bad reed switches and a couple of "battery eaters" I don't have any
problems with their wireless.