Additional Features: Hot-swappable test cards Multi-user, remotely accessible Support for SONET/SDH, POS, ATM, Ethernet, FR and Fibre Channel interfaces Capable of daisy-chaining up to 60 chassis, time synchronized to 10 ns Hundreds of test ports available in one system Completely backward compatible with existing RouterTester 900, OmniBER XM and SAN Tester hardware and software