If your alarm system still uses a traditional AT&T phone line, it may stop sending signals when those lines are shut down. That puts alarm monitoring, fire protection, medical alerts, and 911 access at risk.
Sentry Security helps Illinois homes and businesses switch to modern, landline-free security—before service is interrupted.
847.353.7200 | service@sentrysecurity.com | www.sentrysecurity.com
Why This Matters
Older alarm systems were built around phone lines. When those lines go away, signals can fail—leaving systems unable to reach professional monitoring or emergency services.
This is especially critical for fire alarm systems and regulated environments.
How Sentry Security Solves It
- Landline-free communication using wireless security systems.
- Reliable 911 access through 911inform and RapidSOS.
- Code-compliant system upgrades backed by system design and engineering.
- Ongoing monitoring and maintenance services.
Will Your Security System Work After AT&T Landlines Are DiscontinuedWho Should Act Now
This affects:
- Senior care and medical monitoring
- Multifamily properties
- Commercial buildings and retail locations
- Healthcare and education facilities
- High-value and regulated businesses
If your system still plugs into a phone jack, it’s time to act.
Trusted Across Illinois
Sentry Security is recognized for performance and reliability, with proven results documented in case studies and industry awards.
What to Do Next
- Check if your system uses a landline
- Schedule a quick review with Sentry Security
- Upgrade before your phone service is disconnected
Request a quote or call 847.353.7200 today.
Sentry Security
Install. Monitor. Maintain. Inspect.