What do I need to connect a DSC 1832 control panel to Control home automation system?

Here is a link that explains what you will need.

DSC (http://www.dsc.com/index.php?n=news&o=main&id=6)

For a quick, cost effictive control of things by remote or local phone is the PC5580:
DSC PowerSeries Telephone Interface & Automation Control Module 5580TC - 5580TC (http://www.dsc.com/index.php?n=products&o=view&id=18)
On a home phone or a Remote phone, you can arm/disarm the system, check status, bypass, control Lighting, X10 Power Line Modules for any Control and the PC5580 TC also allows Temperature control by thermostat.