How many zones does the VISTA-128FBP support, and what expansion options are available to reach the maximum zone count?
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The VISTA-128FBPT supports a maximum of 128 zones (Page 5) [1].
While the manual does not provide a specific list of expansion hardware, it identifies that the system monitors protection zones using 5800 series wireless devices via RF receivers and a polling loop (Page 6, 60) [1].