DIY Wired Security Systems Frequently Asked Questions

Can I Change the Rev Chip on a Vista 21iP?
While you can upgrade the prom chip in a Vista-21iP, it may not always be advantageous to do so. Find out when you should, or shouldn’t upgrade the chip.
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Will the Antenna for a 7845 Work on a 4G Radio?
The Honeywell 7845i is an internet communicator for Vista panels that has no antenna. 4G Vista radios can have an antenna added. Learn about Vista antennas.
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