Permitting direct DS0 level access to hundreds of T1s and E1s from optical SONET or SDH structure, LightSpeed1000™ eliminates need for external multiplexing hardware. Multiple independent streams of any user-defined capacity can be generated internally, analyzed, and monitored in real-time. Platform supports any combination of DS0/64/56/16/8 kbps fractional T1 E1, and N x T1 E1 interface definitions. It offers protocol analysis and emulation of HDLC, SS7, ISDN, CAS, PPP, Frame Relay, and ATM.