>
>The second method is to aquire a modem module
>that uses the Silicon Laboratories SI2400 chip
>
>http://www.silabs.com/products/wireline/iso-modules.asp
>
>This modem chip has an extended AT command set that can
>communicate in security industry pulse, contact id and
>SIA formats directly.

How interesting! I didn't know this stuff was still around.
Remember black controllers from Delta, with slide switches to set the CSR and zone codes?  :)

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