Affording direct access to any or all T1s E1s (84 T1s = 4,032 DS0s or 63 E1s = 3,906 DS0s) inside OC-3 STM-1, LightSpeed1000™ comes with all necessary software for capturing, monitoring, emulation, and protocol analysis over SONET-SDH links. While 2 ports are meant for SONET/SDH unchannelized and unframed data, other 2 ports can be SONET/SDH or GigE (future) ports meant for channelized T1 E1. Hardware-based time-stamping of cells offers 10 nsec resolution and 1 ppm accuracy.