Welcome, ACI Customers

Alarm Center (DBA Custom Security Systems, Ace Fire & Security Systems, Alarm Guard Security Systems, and Capital Alarm) is now part of the STANLEY Security family. We are committed to delivering proven and innovative security solutions that protect what matters most to you.

To contact one of our other security businesses including STANLEY Access Technologies (Automatic Doors), STANLEY Healthcare, Sonitrol, or Pacom, please visit our Security Businesses Page.

Relocation or New Ownership

If you are relocating, under new ownership, or looking to make a change to your services with STANLEY, click here.

Invoice Inquiry

If you have a question regarding your invoice, click here.

Customer Service Inquiry

To reach us by phone, please call 855-578-2653. If you need to discuss an urgent monitoring issue, please callĀ 877-476-4968.