I just want to raise an issue that will come up if you use the Paradox line of products. Bottom line, they are changing panel lines and keypads so often now that they have failed to keep enough stock of the older equipment to allow us to provide a decent level of service on older equipment.
For example, there are no 748 Express panels available for order. There are no Spectra 1738 high end LCD 1641 keypads available anywhere should one die (I have over 400 of these in service). There are no Digiplex 848 keypads available, nor is the 738 Express panel available any longer (I have 600 of these in service). If certain components fail, it necessitates changing out the entire system rather than replacing a single component.
I believe that a company has a responsibility to its customers (us the dealers) to maintain an inventory of older stock equipment to allow us to maintain services for our clients for a reasonable period of time (reasonable obviously being the salient point.....). Think how this would affect things if automobile dealers did the same sort of thing.....:(((
I have written the President of Paradox Systems formally with my concerns. I will keep the group posted on any responses I get. The world's a different place now with the internet; I hope they realize that they can't just ignore problems which can affect their bottom line....
DSC have done the same over the years but not to the same extent. They have tried to evolve their panels such that keypads have some compatibility with newer boards, but clearly Paradox have not...