Central Station Experiencing an Uptick In Blocked Calls

Our central station partner, CMS, recently notified us of an uptick in its operators receiving "Line Busy" messages when making outbound calls. This issue appears to be caused by calls being blocked by the carrier or the subscriber. Either way, there is little they can do about this issue.

If you're an Alarm Grid customer with full central station monitoring you should make sure that you are not blocking the number 800-432-1429. Once you verify that this number is not blocked on your phone, or on the phone of any member of your call list, then you might try a test.

To be one hundred percent sure you don't cause an unnecessary dispatch, contact the monitoring station by dialing 888-818-7728 and choosing Option 9. Once you have a central station operator on the phone, let them know you want to perform a test to be sure their calls are coming through properly to your phone. They can then instruct you on the best way to proceed.

This may involve you setting off an alarm, or they may simply be able to call you for verification. If the people on your call list have a different phone carrier than you, you may need to repeat this test for each of their phones. It's best to be sure now rather than risk a call not getting through during an alarm.

To further insure that you receive calls promptly from the monitoring station, we recommend that you add their number to your contacts in such a way that you'll know immediately when you receive a call from them. Name the contact "ALARM! CMS ALARM!" or whatever it takes to get your attention.

It's also a good idea to follow the instructions for your phone so that when your phone is in Do Not Disturb Mode, Sleep Mode, or any other Focus (iOS) Mode you still receive calls from the monitoring station.

On Android phones, go to Settings > Sound and Vibration > Do Not Disturb > Manage Exceptions. You can choose to allow any "Starred Contacts" to bypass DND. You can also select individual people/contacts that can bypass it. On iPhone, go to Settings > Focus > Select a Focus such as Do Not Disturb > Allow Calls From > Choose individual Contacts or Groups.

If you verify that you are able to receive these calls based on your phone settings, but still can't receiving their calls, then you need to contact your phone carrier and make sure that they are not blocking the monitoring station's number. This could happen because they believe the number be spam or some type of potential scam. This classification may come from automation on the part of the phone carrier, and the designation may have been applied to the monitoring station's number in error.

If you are a central station monitored customer it is very important that you can receive phone calls from the monitoring station. This prevents unnecessary dispatch of the authorities. Even if you aren't an Alarm Grid customer, you should be certain you are able to receive calls from your monitoring station. As a system, every portion of your alarm must work in order to be effective. That includes the monitoring station's ability to contact you.