ZTE ZXMP S380 S390 SDH ZXMP S390/S380 is developed in one platform. It can implement smooth upgrade from ZXMP S380 to ZXMP S390 and from 2.5G to 10G. It can transmit large-capacity and LH service. It is used for backbone transmission network establishment/expansion and large-capacity metro service dispatching to meet bandwidth demands in different fields and at different levels. Powerful cross ZXMP S390 has the capability of 1024?1024 equivalent VC-4 high-order cross (160G), 20G low-order cross and 120G access. It has 12 10G optical directions, with access capacity of 120G. Multiservice access ZXMP S390/ZXMP S380 has multiple service interfaces, e.g., STM-64/16/4/1 optical interfaces, STM-1, E3/T3 and E1 electrical interfaces, 10M/100M and 1000M Ethernet interfaces and ATM interface. It has high-integration service interface board for large-capacity service access. And ZXMP S390/ZXMP S380 provides extra data interface via SOH overhead bytes as well as flexible overhead channel add/drop mode. Auxiliary interfaces are on OW board and are used for extra low-rate service. OW has 3 orderwire interfaces, 5 RS-232/422 interfaces and F1 64kbit/s data interface. Good equipment and network protection ZXMP S390/ZXMP S380 adopts the hardware redundancy design and dual-bus architecture. Cross board and clock board are in 1+1 hot backup to improve system reliability and stability. Dual power distribution systems are employed to ensure the power supply security. Functional boards employ the distributed power supply to eliminate the inter-board power effect and reduce the influence of hot plugging/unplugging on the system. ZXMP S390/ZXMP S380 can implement all network protections in ITU-T to satisfy different networking demands from clients. These protections are point-to-point or chain 1+1/1:1 line protection, multi-fiber chain MS 1:N line protection, 2-fiber unidirectional protection ring, 2-fiber bidirectional MS protecting ring, 4-fiber bidirectional MS protecting ring, Dual-Node Interconnection protection (DNI) and SubNet Connection Protection (SNCP). And it can implement a new network protection —— logic subnet protection on the basis of ITU-T recommendations. Transparent overhead transmission ZXMP S390/ZXMP S380 supports transparent overhead transmission to increase networking flexibility, resolve the problems caused by fewer fibers, assure NM consistency and NM information continuity, and uniformly manage subnets at different localities. Adaptability to the existing fiber network The existing fiber networks mostly use G.652 fiber, the dispersion problem must be resolved for 10Gbit/s service on standard G.652 fiber. ZXMP S390/ZXMP S380 has advanced dispersion management to improve fiber adaptability, especially the adaptability to the existing G.652 fiber network. Excellent timing synchronization processing ZXMP S390/ZXMP S380 can select multiple timing sources as equipment timing reference: external clock, clock extracting from STM-N service interface and internal clock. Timing system has three working modes: synchronous locking mode, hold-on mode and free-run mode. The system supports synchronous priority switching and SSM algorithm-based automatic switching. In the complex transmission network, the SSM algorithm-based automatic switching can optimize the timing synchronization distribution of the network to reduce synchronization planning difficulty, avoid timing loop and assure the network synchronization in the best status. And ZTE’s SDH products have the patented S1 byte algorithm to raise and optimize network synchronization. Powerful RPR data features to support IP evolution and protect CAPEX for the future On the basis of the inherited MSTP advantages, RPR resolves some problems about EOS rigid tunnel and low carrying efficiency for high-convergence-ratio data service. It has bandwidth statistical multiplexing and service awareness functions and offers differential QOS. The embedded RPR solution makes full use of equipment in the existing network to meet the recent increasing demands for data service, reduce network construction cost and protect CAPEX for the future network evolution. Support mixed slot insertion and optimize equipment configuration and network planning flexibly When multiple rings is established flexibly, line boards can be configured randomly without slot pair, and network configuration and planning can be optimized easily to improve network flexibility. General design of service board to reduce the cost of spare boards and parts ZXMP S390/ZXMP S380 adopts the general design of service boards to share spare boards and parts so as to reduce the cost.
