# Tierzero - Business Internet, Voice & Managed Services > Tierzero provides enterprise-grade internet, business phone systems, and managed network services to businesses in Los Angeles and Southern California. Founded in 1997 and trusted by 60,000+ users, we specialize in dedicated fiber, broadband, SD-WAN, VoIP, unified communications, managed firewalls, and network-as-a-service solutions. One Company. One Smart Bill. ## Services ### Internet Services - [Dedicated Fiber](https://tierzero.com/services/internet/dedicated-fiber): Secure, dedicated fiber circuits with guaranteed symmetric bandwidth and SLA-backed uptime for businesses. - [Broadband Fiber](https://tierzero.com/services/internet/broadband-fiber): Shared best-effort fiber internet offering high speeds at a lower cost than dedicated fiber. - [Broadband Cable](https://tierzero.com/services/internet/broadband-cable): Business cable internet with high speeds and low cost, delivered as a best-effort shared service. - [Fixed Wireless Internet](https://tierzero.com/services/internet/fixed-wireless): High-speed internet delivered via point-to-point radio signals, deployable in as little as one day. - [5G Network](https://tierzero.com/services/internet/5g-network): 5G-powered backup internet that automatically fails over when your primary connection goes down. - [Starlink](https://tierzero.com/services/internet/starlink): Managed Starlink satellite internet integration with Traffic Manager for redundancy and monitoring. - [LTE Backup](https://tierzero.com/services/internet/lte-backup): 4G LTE automatic failover solution to keep your business online during primary internet outages. - [10 Gig Fiber](https://tierzero.com/services/internet/10-gig-fiber): Lightning-fast 10 Gbps dedicated fiber internet with 99.999% uptime guarantee. - [Data Center & Colocation](https://tierzero.com/services/internet/data-center): Scalable colocation from single cabinets to power pods, plus IP bandwidth from 1 Gbps to 100 Gbps in Downtown LA. ### Voice Services - [Hosted PBX](https://tierzero.com/services/voice/hosted-pbx): Cloud-based VoIP phone system with 40+ enterprise features, unlimited calling, and mobile app. - [VoIP Phone Lines (SIP Trunks)](https://tierzero.com/services/voice/sip-trunking): Connect your existing phone system to the cloud with SIP trunking for lower costs and more features. - [Call Center Platform](https://tierzero.com/services/voice/call-center): Automated inbound call center with real-time reporting, customizable call flows, and performance analytics. - [POTS Replacement](https://tierzero.com/services/voice/pots-replacement): Replace expensive copper phone lines with modern, reliable VoIP technology. - [Virtual Fax Plus](https://tierzero.com/services/voice/virtual-fax): HIPAA-compliant cloud fax service — send and receive faxes from email with no hardware required. ### Managed Services - [Traffic Manager (SD-WAN)](https://tierzero.com/services/managed/traffic-manager): Software-defined WAN that optimizes network performance, provides failover, and connects multiple locations. - [Network as a Service](https://tierzero.com/services/managed/network-as-a-service): Fully managed end-to-end network with 24/7 monitoring, one vendor, and one bill. - [Fail-Safe Internet](https://tierzero.com/services/managed/fail-safe-internet): Guaranteed uptime with automatic failover protection across multiple carriers. - [Managed Firewall](https://tierzero.com/services/managed/managed-firewall): Enterprise-grade, HIPAA-compliant firewall protection with VPN, automatic updates, and 24/7 monitoring. - [Managed LAN Switch](https://tierzero.com/services/managed/managed-switch): Professionally configured and monitored LAN switches with optimized VLANs and QoS. - [Managed Wi-Fi](https://tierzero.com/services/managed/managed-wifi): Enterprise-grade wireless with guest networks, seamless roaming, and full management. - [Microsoft Teams](https://tierzero.com/services/managed/microsoft-teams): Direct routing integration to make and receive PSTN calls directly from Microsoft Teams. - [Business VoIP](https://tierzero.com/services/managed/business-voip): Comprehensive hosted PBX VoIP solution with HD voice, 40+ features, and mobile app. - [Bring Your Own Bandwidth](https://tierzero.com/services/managed/bring-your-own-bandwidth): Integrate your existing internet connection into Tierzero's Traffic Manager for redundancy and monitoring. - [Network Cabling](https://tierzero.com/services/managed/network-cabling): Professional Cat6/Cat6a network cabling installation with testing and certification. - [SD-WAN](https://tierzero.com/services/managed/sd-wan): Software-defined networking that identifies and resolves network issues before they become problems. ## Key Pages - [About Tierzero](https://tierzero.com/about): Company information — serving businesses since 1997 with 60,000+ users. - [Contact](https://tierzero.com/contact): Get in touch for a quote or consultation. Phone: (213) 784-1400. - [FAQ](https://tierzero.com/faq): Frequently asked questions about business internet, VoIP, and networking. - [Blog](https://tierzero.com/blog): Industry insights and guides on business telecom. - [Case Studies](https://tierzero.com/case-studies): Real customer success stories. - [Packages](https://tierzero.com/packages): Bundled service packages for small, mid-size, and enterprise businesses. - [Speed Test](https://tierzero.com/resources/speedtest): Test your current internet speed. - [Bandwidth Calculator](https://tierzero.com/resources/bandwidth-calculator): Calculate your business bandwidth needs. ## Service Areas Los Angeles, Southern California, and nationwide for certain services. ## Contact - Phone: (213) 784-1400 - Email: sales@tierzero.com - Address: 818 W 7th St STE 440, Los Angeles, CA 90017