Ethernet Over Self-Healing Network (SHNS)

Keep Your Business Up and Running with SHNS

Point-to-point service that connects two customer or wire center locations.

Who can blame you for wanting to avoid downtime at all costs? Fortunately, CenturyLink offers a solution that allows you to minimize this pesky part of doing business without breaking the bank. Ethernet over Self-Healing Network Services (SHNS) provides business continuation, disaster recovery, and survivability through a failure-resistant telecommunications network. The service is designed to automatically detect service degradation or a single failure anywhere within the system. It then reconfigures itself around the point of failure to ensure a near-continuous flow of information between those locations that are within the survivable network.


Provides nearly instantaneous switch-to-protection path—not to exceed 50 milliseconds.

Offers customized solutions designed to specific requirements and precise network needs.

Supports new technology with minimal re-engineering and cost.

Includes out of service credits.

Provides scalability and flexibility.

Provides security and reliability.

Eliminates costly downtime.


Broad applications for networks of all sizes.

Instantaneous re-routing of transmissions within 50 milliseconds.

99.99 percent availability with a bit error rate of 10-9 or one error in one billion bits.

Drop-and-insert multiplexing enables pre-designation of the number of individual channels serving each location to meet usage needs.

Range of system bandwidth capacities (155.52Mbps, 622.08Mbps, 2.488Gbps and 9.95Gbps data speeds).

Connection to multiple CenturyLink-provided services, including DS-1, DS-3, Digital Switched Service, and Switched Access Service.

Performance monitoring with detailed performance information and real-time status verifications.

Constant network monitoring includes standard 24-hour alarm surveillance and/or performance monitoring.

Central office connecting channel provides for connections to another SHNS ring or from the SHNS ring to any central-office-based service that interfaces at the same bandwidth.

Software reconfiguration capability allows reconfiguration of existing channels within the SHNS on a daily basis to suit changing operational demands.

SONET multiplexing allows high-bandwidth circuits to be multiplexed into lower bandwidth circuits inside a SONET system.

How It Works

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. 

Network Maps

The CenturyLink network covers the entire 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

Metro Ethernet

Boost network application performance and increase network flexibility.

Synchronous Service Transport (SST)

Ensure high-capacity transport for your changing business needs with SST.

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