It is a new generation multi-services transmission and access device based on SDH technologies. The function models design adopts G.783 suggestions and provides complete monitor, access, protection, network management and Ethernet access function. SDH155 can provide 2 STM-1 uplink interfaces, 4 E1 interfaces and 4 10/100BaseT Ethernet interfaces. It adopts modular structure design for flexible service configurations according to different requirements. It can be used as service access and transmission devices on access layer in the data traffic networks, adopts SNMP network management platform which provides grades powerful management based on Service/Client end mode.
■High-integration, modularized design.
■Provide 2 STM-1 uplink interfaces.
■Provide 1+1 channel protection, realize fast protection switching.
■4 E1 interfaces and 4 10/100BaseT Ethernet interfaces.
■Complete clock function, provide clock tracking and holding functions.
■2.048Mbit/s external synchronous signal input/output.
■Clock resource can select line clock, external clock or free-run.
■Via SNMP network management system, user can do operations for device and network formed by it and the operations include configuration, maintenance and monitor.
■Network management can realize five major functions included: configuration, alarm, performance, maintenance and security which satisfy with ITU-T suggestions.
■Provide Console interface, support local management via serial port on PC.
■For Ethernet service, GFP and LAPS technology is used, have LCAS function.
■The maximal Ethernet band is 100M.
■It can be used as TM or ADM.
Operating temperature: 0~50 deg.
Deposited temperature: -20~70 deg.
Relative humidity; <95% ( on-condensing)
Power supply mode: AC220V, AC110V or DC-48V
Power DC-48V: input range: DC-36V~DC-72V
Power AC220V: input range: AC180V~AC260V
Power AC110V: input range: AC90V~130V
Power consumption: <7W
Optical interface performance index
Optical interface performance index complies with ITU-T G.957/G.958
Work wave length: 1310nm
Fiber type: ITU-T G.652/G.653, SM
Transmission distance: 0～120Km for option
Receiving sensitivity: <-36 (BER<10)
Complies with ITU-T G.703
Data rate: 2048kbit/s
Impendence: 75ohm unbalanced, 120ohm balanced for option
Jitter characteristic: complied with ITU-T G.742, ITU-T G.823
Rate：10/100M，Full-duplexes, half-duplex completely auto-adapted
MAC address table：can learn 1024 MAC address
Ethernet total cache：64MBits SDRAM
Physical interface：RJ45 interface, Supports cross/straight line of Adaptive
1U/19 inch: 483*126*44mm