• A Strategic Initiative to Advance America's Telecommunications Infrastructure

Spectrum Business + TeleFortress

Reliable SIP Trunking Over DIA, Business Fiber, and Broadband Access

Spectrum Business + TeleFortress

Spectrum Business delivers high-speed connectivity to over 1 million on-net commercial buildings, making it one of the most accessible access layers for voice and UC infrastructure across the U.S. TeleFortress overlays STIR/SHAKEN-compliant SIP trunking, E911 routing, and CLI trust enforcement over Spectrum’s infrastructure, giving enterprises a secure, regulatory-grade voice backbone that’s optimized for SMBs, clinics, and distributed offices.

“Spectrum delivers the access. TeleFortress delivers the trust.”

TeleFortress

Why Spectrum Business + TeleFortress?

SIP Trunking Over Broadband, Fiber, or DIA

  • Supports SIP handoffs from coax, Ethernet, or fiber-connected Spectrum circuits
  • Compatible with Microsoft Teams, Zoom, Webex, Genesys, and UCaaS stacks
  • Excellent for quick-turn deployments, SMB failover, or branch office provisioning

STIR/SHAKEN-Enabled Voice Delivery

  • Every outbound call signed with Attestation A or B
  • CLI spoofing prevention, trust scoring, and traceback logs included
  • Stops “spam likely” branding and improves call answer rates

E911 Routing for Multi-Site Environments

  • Supports RAY BAUM’S Act + Kari’s Law compliance
  • DID-to-location mapping built for dynamic or fixed sites
  • Emergency call routing with low-latency, redundant SIP paths

Ideal for SMBs, Clinics, and Mid-Market UCaaS

  • Perfect for cost-effective SIP trunking over existing Spectrum circuits
  • BYOC voice infrastructure available across thousands of cities
  • Simple deployment with full compliance baked in

Ideal Use Cases

Retail locations and offices using Spectrum Business Internet

SIP trunking for SMBs upgrading from PRI or legacy PBX

UCaaS deployments with Teams, Zoom, or Webex on Spectrum access

Clinics, franchises, or branch offices needing CLI trust and E911

Hybrid deployments using Spectrum DIA as SIP failover

Robotic hand with digital shield graphic
TeleFortress

What TeleFortress Adds to Spectrum Access

FCC-licensed U.S. voice carrier

Full STIR/SHAKEN stack with CLI attestation

TLS/SRTP SIP encryption and fraud filtering

E911 routing, DID provisioning, CNAM branding

If your business runs on Spectrum Internet, TeleFortress makes it secure, signed, and voice-compliant.

Nationwide Reach

TeleFortress SIP services are available over Spectrum Business access in:

Get SIP-Compliant Over Spectrum Business

Request a provisioning review, compliance check, or SIP handoff planning session