we just bought a home that was a forclosure withthis alarm but no one knows codes for alarm how can we use the system

dan, January 2010

A small correction, it's an ITI Concord Express system.

There are many versions if this, afraid I know nothing about it.

If you search Google with, ITI Concord Express, the first 'hit' might be able to help/point you in the right direction, GE SEcurity, ask their Customer support

acorn, January 2010