features: 1. support up to stm-1/stm-4/stm-16 2. sdh/pdh/pcm all integrated 3. large cross-connect matrix capacity is 96*96 high order vc-4 cross connection or 2016*2016 vc-12 or 96*96 vc-3 level full cross connection 4. support 1+1 msp, sncp pro more...