Firex i4618 Can I hook this model to my DSC 1832 alarm system?

This is a smoke alarm and is not intended to be connected to your alarm system. While there is often a way to connect a listed relay for that purpose, connecting your smoke alarms to your alarm system can cause as many problems as not. Because the devices are not made to interface directly with the alarm system, proper supervision is usually not achievable. Loss of power might even cause false alarms. Some alarm companies even have policies in place forbidding such connections. Additionally, in the event of a false alarm you will need to call an electrician because most alarm technicians are not licensed to work on high voltage smokes. As a rule, you're much better off to add a few LV or RF smoke detectors to your alarm system for monitoring than to try to interface smoke alarms. Hope this was helpful.