As a key member of Inmidas SDH MUX Product family, MDS-155S is a carrier-class, cost-effective, compact (only 1U high) SDH/MSPP platform that is designed for applications in metro and access networks to facilitate the efficient transport of traditional TDM and emerging data traffic for service providers. MDS-155S is a modularized unit with 4 universal slots, supporting different interface cards, such as STM-1 fiber optic cards, E1 cards, Ethernet cards (EoS VCAT), and V.35 card. The main board cross-connect capacity is 504?504 VC-12s (8?8 VC-4s), allowing non-blocking adding/dropping services among different interfaces. It supports the hybrid transmission of SDH, PDH, Ethernet and N?64K V.35 services within the same equipment. With the large capacity cross-connect matrix, the MDS-155S can be configured as ADM, TM, and REG. It is suitable for multiple network topologies such as point-to-point, chain, ring, hub, and mesh networks. 1. 4 General Slots, supporting a range of interface cards, including SDH, PDH, Ethernet and V.35 cards. 2. Ethernet service supporting GFP encapsulation, VC12 virtual concatenation (1~63 VC12) 3. Large cross-connect matrix capacity is 504?504 VC-12s (8?8 VC-4s) and powerful networking ability 4. LCD display for system configuration and alarm 5. Inter-working with popular SDH/MSPP products of various vendors 6. Suitable for 3G access network transmission 7. Easy commissioning and maintenance 8. High integration, compact design 9. High reliability, low CAPEX and OPEX