In sync with SONET: the why of wander and how to measure it

Wander is an important element that affects the synchronization path of a Synchronous Optical Network system. The limits of wander in the signals that travel in such a system have been specified in terms of time deviation and maximum time interval error masks. The specifications and definitions for such limits include wander generation, interface wander, derived DS1 wander, phase transients, entry into holdover and wander transfer.
There are many links in the synchronization path of a Synchronous Optical Network (Sonet) system - from the primary reference sources to the network elements, such as PRS clocks, bits [...]