SIP Trunk

Manage Costs and Consolidate Infrastructure with SIP Trunk

Consolidate your voice traffic over our robust data network and
maximize your IT budget.

CenturyLink SIP (Session Initiation Protocol) Trunk is a scalable solution that enables the origination and termination of local voice and dedicated long-distance, as well as domestic and international toll-free service across a streamlined data connection. SIP Trunk gives you the security and reliability of MPLS while making the most of your current infrastructure to provide high quality voice services.


Scales with Your Business

Support multiple locations on one service.

Increase Reliability

Gain the confidence and reliability of MPLS for voice service.

Leverage Existing Investments

Expand operations inexpensively by leveraging existing equipment (IP-PBX) for new locations.

Manage Costs

Aggregate multiple voice networks and their associated costs.

Keep Existing Phone Numbers

Port existing POTS (Plain Old Telephone Service) numbers to VoIP (Voice Over Internet Protocol) service.

Online Monitoring & Support

Access network configurations, performance monitoring, trouble ticket submissions, and tracking from any Internet connection.


Domestic and International Toll-Free Service* 

Control Center Online Network Management Tool

Inherent Benefit of Closed Networking with Purchase of MPLS Private Ports

Dedicated Long-Distance*

Flexible Scalability

Switch Diversity*

Competitive SLAs

Local Number Portability Support

Emergency 911 Service

*Off-Net Long Distance, domestic and international Toll Free, and Switch Diversity are available as an option. Additional charges apply. CenturyLink IQ® Networking ports are purchased separately from the CenturyLink SIP Trunk service.

Why SIP Trunk?

See how SIP Trunk addresses the following challenges. (Click to expand)

Reduce costs

Increase productivity

Security & reliability


Network Maps

The CenturyLink network covers the continental United States and has one of the largest fiber footprints. Internationally, we provide coverage to hundreds of destinations.

More Services and Solutions for You

Hosted VoIP

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Managed Office

Get Internet, voice and business applications—including Microsoft® Office 365—in one complete solution.

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