Features and Applications of Raytrans 21E1 SDH Optical Terminal

The Raytrans 21E1 SDH Optical Terminal is an STM-1 level Synchronous Digital Hierarchy (SDH) optical transmission device, supporting two 155.52Mb/s aggregate optical interfaces (A and B), 21 E1 interfaces, 4 physically isolated Ethernet ports, and 2 V.35/V.11 interfaces. The SDH Optical Terminal can function as an Add-Drop Multiplexer (ADM) device, serving as a transmission network node to provide add/drop multiplexing for 21 E1 channels. It can also operate as a Terminal Multiplexer (TM) device, used as an optical transmission module for switches. The concise and comprehensive network management functions of the SDH Optical Terminal enable configuration, fault query, data statistics, and real-time monitoring of network operation status.

The Raytrans 21E1 SDH Optical Terminal adopts a 19-inch 1U standard chassis structure for easy installation; technical performance fully complies with ITU-T and domestic SDH specifications; VC-12 full cross-connection and channel protection functions; the SDH Optical Terminal provides two STM-1 optical interfaces, supporting 1+1 channel protection; the SDH Optical Terminal uses high-density connector physical interfaces; 2 channels of n×64K (n=1~31) V.35/V.11 interfaces; the SDH Optical Terminal provides 4 channels of N×E1 bandwidth bonding with physically isolated Ethernet; E1, Ethernet, and V.35 data services are optional; the SDH Optical Terminal supports point-to-point, chain, and ring networking topologies, and can also be integrated with centralized MSTP systems for joint networking; the SDH Optical Terminal complies with ITU-T G.813 standards, fully meeting requirements for timing accuracy, pull-in/pull-out, noise generation, noise tolerance, transfer characteristics, and long/short-term phase response (holdover mode); the SDH Optical Terminal features comprehensive network management functions for online real-time monitoring; the SDH Optical Terminal can interconnect with the STM-1 optical interface of any standard SDH/MSTP device.