Business Phone Lines
Already have a phone system? Get reliable, high-quality phone lines from Tierzero—one line at a time or hundreds. Perfect for businesses that need lines without a full hosted PBX solution.
Everything You Get with Business Phone Lines
Enterprise-grade capabilities backed by 24/7 US-based support.
Scalable Lines
Order exactly what you need—from a single line to hundreds. Add or remove lines as your business changes.
Works with Your PBX
Bring your own phone system. Our SIP lines work with virtually any modern PBX or phone system.
HD Voice Quality
Crystal-clear call quality with our EVP™ technology that prioritizes voice traffic on your network.
Local & Toll-Free Numbers
Get local numbers in any area code, toll-free numbers, or port your existing numbers to Tierzero.
Get Started in 3 Simple Steps
No complexity. No hassle. Just reliable service.
Tell Us Your Needs
Share your requirements and we'll design a custom solution for your business.
We Handle Setup
Our expert team manages installation and configuration—no disruption to your operations.
Enjoy 24/7 Support
Go live with confidence knowing our US-based team is always just a call away.
Common Questions About Business Phone Lines
Get answers to the most frequently asked questions. Still need help?
Call us at +1 (213) 784-1400Ready to Get Started with Business Phone Lines?
Join 60,000+ users who trust Tierzero for their business communications. Get a custom quote in minutes.
Prefer to talk? Our experts are standing by.
+1 (213) 784-1400