Updated: 10/17/2017 by Computer Hope

Short for Synchronous Optical NETwork, SONET is an ANSI standard for connecting fiber-optic networks. The SONET standard is a physical network layer and is used to carry a large amount of data at long distances in a broad range of high-level network protocols at the rate of 2.488 Gbps. Synchronous denotes the network's reliance on a clock to make sure all hosts run at the same rate to reduce network collisions and to create a more effective network.

Note: Outside the United States SONET is also referred to as synchronous digital hierarchy or SDH.

Fiber-optic, Network terms, POS