Customer Support

Security Instrument maintains a dedicated customer service team focused on delivering the most reliable, friendly, professional service and support available.

Our business hours are from 7:30 am to 4:30 pm Monday-Friday. We maintain a 24/7 on call service staff to handle your emergency service needs. Requests for after hour service are made directly through our Central Station operation by calling your local office or the numbers listed below.

Speak To A Representative

Toll Free (800) 244-2261
Wilmington (302) 633-5621
Milton (302) 645-2212
Dover (302) 674-2261

Automated System

Our automated answering system is as easy as 1-2-3-4
Option 1 – Central Station
Option 2 – Customer Service
Option 3 – Administrative Services
Option 4 – Sales Services

Cancel An Alarm

To cancel an accidental alarm, please deactivate your system and call our Central Station Toll Free at (800) 244-2261, Option 1. Please have your personal pass-code ready so our operator can verify your authorization.

Welcome To Customer Service!

At Security Instrument we realize that your systems performance over time is the true benchmark to measure the real value of your investment. Our goal is not only to furnish the latest technology from top manufacturers and a high quality installation, but to deliver the highest level of service and support required to extend the useful life of your system.

Online Support Services

Account Services

Pay bills, review invoices, and request service.

Request Service

Need help? Our certified technicians are here to assist you when you need it.

SI Web Link

Run reports, view system activity, contact listings, alarm history, and more!

Remote Video Cloud Services

Manage your video remotely. Live view, review history, configure event notification!

Manuals & Videos

View and download the most commonly used manuals for your security equipment.


Got a question? We have the answer! Visit our FAQ for the most commonly asked questions.

Remote Access Control Services

Manage your doors remotely. Grant access, lock it remotely, be notified when someone opens the door.

DMP VK Portal

Login to your DMP Virtual Keypad Account through the portal and have access to its features just as if you were on the door.