The Next Step in the Evolution of Voice, Data and Video Transport

Ensure high-capacity transport for your changing business needs with SST.
Are your voice, data, and video transport needs outgrowing the capacity of your existing DS-1 or DS-3 lines? Synchronous Service Transport (SST) is a two-point broadband, shared Private Line solution that provides you with a reliable high-capacity connection for the transfer of large volumes of traffic. SST can help grow your business by offering economies of scale, scalability and interoperability.


  • Interoperability with Most Data Format System Types:
    • Interoperability across equipment vendors 
    • Primary rate interface (PRI) and digital data services (DDS) data and voice trunks 
    • Frame relay service (FRS) and asynchronous transfer mode (ATM) packet services 
    • Newer dense wavelength division multiplexing (DWDM) technologies 
  • Speeds of 155.52 Mbps for OC-3, 622.08 Mbps for OC-12, 1.2 Gbps for OC-24, 2.49 Gbps for OC-48 and 9.95 Gbps for OC-192.
  • Channelized and Concatenated Service Availability 
  • Superior Quality of Service:
    • Throughput equals purchased bandwidth (no congestion) 
    • Visibility to data channels 
    • Advanced monitoring/alarming and performance characteristics 
    • SLAs for service availability, mean time to repair (MTTR) and customer notification 
    • Optional Self-Healing Alternate Route Protection [link to ] (SHARP) availability allows separation of working and protect fiber 
    • Electronic redundancy maximizes service availability and survivability 
  • SONET Technology Offering High Reliability and Survivability.
  • 24/7 CenturyLink Monitoring


  • Consolidates Your Lower-Speed Services
  • Grows With Your Business to Meet Your Future Needs
  • Offers 24/7 Network Monitoring and Repair Availability
  • Eliminates Valuable Network Downtime
  • Provides Enhanced Network Survivability via Optional SHARP Capabilities
  • Works with PRI and DDS Data and Voice Trunks, FRS and ATM Packet Services and DWDM Technologies
SST is a point-to-point service that connects two customer or wire center locations. You can also tie together more locations by cross-connecting SST systems or connecting with other services. Should your network sustain a fiber cut, SST’s four-fiber configuration makes it possible for your network to remain functional. The service allows multiple circuit types, such as DS-1, DS-3, STS-1, OC-3, OC-3c (concatenated), OC-12, OC-12c, OC-48, OC-48c, 10 Mb Ethernet, 100 Mb Ethernet and 1 Gigabit Ethernet, to ride the SST separately or in combination, meeting your unique volume-transport needs. SONET technology ensures your network has the highest level of survivability available today. 
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