Skip to main content

Ensure that your communication capabilities keep pace with your changing business requirements with CenturyLink® T1/DS1. Many businesses accommodate their growing voice, data and video transport needs by purchasing additional low speed circuits. Over time, that can add up to excessive circuits and expense. Private Line T1/DS1 service can reliably and securely aggregate your traffic on a single, cost-effective, high-speed circuit eliminating the need for multiple low-speed channels.


Product Overview

Our effective and cost-efficient Private Line: T1/DS1 is a dedicated full duplex point-to-point, high-capacity private line transport service that reliably and securely aggregates traffic on a single cost-effective circuit.

That helps you cut cost and improve response time. Transmission is digital, which means your signal is clean and free of cross talk, amplified noise and distortion maximizing business efficiency. T-1/DS-1 channels can be provided between two of your designated locations, or between one location and a CenturyLink wire center.

With CenturyLink as your T-1/DS-1 Internet service provider, you'll never have to worry about your communications technology slowing your business down.

Private Line: T1/DS1 transmits of isochronous serial data at 1.544Mbps. The service has the capacity of 24 voice-equivalent channels. It is provisioned on copper, fiber and in some instances, microwave radio. In some high-density cities, the service is provisioned on a synchronous optical network (SONET)-based interoffice network that connects wire centers.

Features and Options

  • Copper, fiber, and microwave radio provisioning
  • Central office multiplexing - 24 voice-equivalent channel capacity
  • Central office multiplexer-to-multiplexer connection
  • Isochronous serial data transmission at 1.544Mbps
  • Control of services via Command a Link
  • Clear channel capability
  • Self-healing alternate route protection (SHARP) for local loop
  • Automatic loop transfer protection against copper facilities failure
  • Framing options include D4 framing, extended super frame, non-ANSI, and free framing
  • Line code options include alternate mark inversion and binary eight zero substitution


  • Ensures reliable, secure transport of high-volume communications between 2 locations
  • Aggregates point-to-point voice, data, and video traffic on a single dedicated, cost-effective circuit
  • Improves response time
  • Provides clean, pure transmissions
  • Comes with a service level agreement for provisioning and repair
  • Enhances quality and utility of service with optional features

T1/DS1 channels can be provided between 2 of your designated locations, or between 1 location and a CenturyLink wire center.

From Our Industry Experts

We chose CenturyLink for the same reasons that our guests choose us. They deliver anticipatory service, take care of business, inspire trust and follow-up to resolve any issues.

Kerrington Hing  • General Manager
Waldorf Astoria Hotels & Resorts

Network Maps

The CenturyLink network covers the entire continental United States, and hundreds of international destinations.

View Network Maps >