Description: SDH/MSTP: STM-1 to 63*E1 Features 1. 1U box SDH/MSPP with 1 or 2 STM-1 optical interfaces and 63E1 interface. 2. Optical interface supports ALS (Auto Laser Shutdown) function 3. Inter-working with popular SDH/MSPP products of various vendors 4. Support TUG3-TUG2-TU12 tributary channel numbering and time slot numbering at ease 5. Support internal, STM-1 line clock, external and tributary clocking 6. LCD display for system configuration and alarm 7. Support remote power-off alarming function 8. SDH/MSPP core, PDH price 9. Support online upgrading 10. Easy commissioning and maintenance 11. High integration, compact design 12. High reliability, low CAPEX and OPEX