Electronic Alarms and Home Security Devices - Shielded wire

My house has a Radio Shack burglar/ fire alarm.The panel was recently fried by a lightning strike. I have purchased a dsc 1832 system to replace it. The wire in my walls is 4 conducter with a braided shield around it. The intructions with 1832 system says not to use shielded wire. Why would this matter?

Shielded cable can increase inductance and capacitance in the cable's conductors that may interfere with the transfer of data. This generally manifests over long distances (over 50 feet), so you may be okay if it's a relatively small home with a head end in a central location.

Before you rip out the old wiring, try clipping the shields at both ends and covering any exposed shielding with black tape so it can't touch any metal parts. If that doesn't work, try landing only one end of the shields to ground at the head-end chassis.

Home alarms are fairly sensative when it comes to it's wiring. I would follow the manufacturers instructions.