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Optimize your voice and UC&C services with our simple, scalable and cost-effective SIP Trunking service.

Improve how your business communicates

Lumen SIP Trunking enables you to use SIP-based services to improve performance, enhance reliability and simplify management with no TDM technology replacement. Easily make calls more securely via the internet using your existing PBX and consolidate phone lines onto a single data network connection.

Business man talking on a headset while working on a computer in front of another business person


Cost Control-Dollar

Manage costs on your terms

Pay for what you need when you need it with flexible pricing options. Changes via our online portal occur in near real time, letting you scale the solution to your technical and financial needs.

Mobile Device

Take it with you

Deploy your voice features anytime, virtually anywhere on most any mobile device. Further empower your workforce with seamless integration into most UC&C platforms.



Easy transition with a trusted partner

Lumen provides a white glove deployment experience with technical assets for turn up, with one contract, unified SLAs and flexible invoicing. A global network, 24/7 operations and support teams help ensure a smooth migration.

Illustration of city buildings with a line connecting them to a phone icon in front of clouds

Features and Specs

  • Leverage existing technology investments with no additional conversion equipment needed. The hybrid hosted designs handle nearly all brands of PBX and key system equipment under the same dial plan
  • Idle capacity of under-utilized site-specific trunks can be shared across the enterprise with pooled sessions
  • Vendor-agnostic SIP platform designed to scale and support business growth
  • Automatically upgrades voice infrastructure with new releases
  • Add new locations, TNs, and adopt new technologies via secure online portal

  • Secure, robust business continuity and disaster recovery capabilities
  • 24/7/365 monitoring of our global network for fraud and security issues with threat protection via embedded network-based security
  • SIP Encryption to and from the device to the Lumen secure network

  • Deploy with or enhance existing UC&C applications to empower geographically dispersed corporate and remote workforces
  • Access national service with adaptable invoicing under a single contract
  • Flexible access methods including: 
    • Lumen IQSM Networking / IP VPN services for additional security, reliability and redundancy
    • Lumen® Dedicated Internet Access
    • Bring your own bandwidth

  • Includes local, national and global calling services with toll free and optional UC&C seat feature packages with dozens of features that can move the call controls to the Lumen edge
  • Telephone numbers have built-in virtual local presence and support optional mobility calling with inbound call rejection options included
  • The Lumen IP-centric networks support SIP and TDM equipment without sacrificing features and benefits
  • Emergency services options are included for end-user service locations which have self-service portal capabilities in our expansive voice footprint
  • In order to maintain your call quality Lumen utilizes uncompressed G.711 protocol to transport your voice traffic across our network. A wide array of CODECs including G.729 for voice and T-38 for faxing are also supported