Area Code Change: Ademco Vista 50

[dbahde at comcast net]

We recently had an area code change and my monitored system is no
longer calling out.

My monitoring company sent me a certified letter (after 3 weeks)
offering to send someone at an excessive (to me) cost for a call that
is basically to program in an area code.

Does someone have step by step instructions I can follow off the key
pad to reprogram the number myself?

Thanks.
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And then, one day, you find, ten years have got behind you.
No one told you when to run, you missed the starting gun.
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