But you don’t want the alarm to relinquish the line before calling the cops. In a home invasion situation, you do not want the bad guys to be able to in any way prevent that outbound automated call or inbound human call from the alarm company. You want the alarm system to seize the line and call out. Call the alarm company with your cell phone to cancel the alarm, if necessary.
Of course, the limiting factor on the protection the system gives is the response time of the local cops. If they are told an alarm has been triggered at a residence, they don’t usually lay rubber getting there. You need a dog and a bunch of guns.
In addition, you need to think about and rehearse how you will deal with cops when they do show up so that everyone involved is safe. The cops will probably ask you to leave the house and walk away from it with them so they can make sure you’re not being constrained.
Of course, the limiting factor on the protection the system gives is the response time of the local cops. If they are told an alarm has been triggered at a residence, they don’t usually lay rubber getting there. You need a dog and a bunch of guns.
In addition, you need to think about and rehearse how you will deal with cops when they do show up so that everyone involved is safe. The cops will probably ask you to leave the house and walk away from it with them so they can make sure you’re not being constrained.
I'm a retired maintenance mechanic and worked in a retirement/assisted living/health care facility. I was first responder to all alarms on the complex when I was working. We had about 40 houses that had alarms. The phones would stay seized sometimes even after I got there {several minutes later} or while I was trying to call and cancel. That was especially true if it was a power issue such as the battery or a storm was in the area etc. If you have cell phone service no problem. All I had was a radio to my dispatcher {switchboard operator} who didn't have the codes.
For my home I'm low tech. I have 2-3 outside motion sensors set up on different chanels on the driveway. Crooks won't see them. I also have a 24/7 Two Terrier Security Service ativated inside the house when we're home. Two Terriers have very sensitive hearing for detecting Rats. Two Terrier System though alerts me to cars coming up the diveway and phone ringing especially my cell which I can't hear that well when asleep and my hearing aids out. I'll have pistol in hand before anyone can gain entry though. :>}
I also have a sign on my entry door "To All Responding Agencies" then some radio communication codes in case I'm not home. LOL.