Vista 20SE phone not working


Old 02-09-19, 12:47 PM
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Join Date: Sep 2018
Location: USA
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Vista 20SE phone not working

I have a Vista 20SE that had been working for years. All sensors and keypads continue to work fine.
I needed to change telephone connections. Now when I connect incoming telephone line to Terminals 23 and 24 the telephone line goes dead, even without connecting the handset to 21, 22.
Is there a module in the Vista 20SE that I can replace to make the system work or is it that I did not connect the handset to 21, 22?
Old 02-09-19, 03:26 PM
Join Date: Sep 2015
Location: US
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Properly wired through a RJ31X jack, the alarm panel is the connection between the premise phones and the telco switch. Unless you are using the Ademco module that lets you Arm/Disarm with a premise phone, the wiring below is correct.

Name:  20SE Phone Terminals.png
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At the jack: In on 4&5, Out on 1&8
At the panel: Telco Red/Green, Premise Brown/Gray

Name:  RJ31X Wiring.jpg
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Size:  17.2 KB

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