Global Tech GT-SDH-155A 63E1 SDH is the compact STM-1 level Synchronous Digital Hierarchy (SDH) transmission system compatible with ITU-T standard. It is designed as a modular system with two 155.520Mb/s optical interfaces to provide an ultra-compact, cost-effective and high capacity platform. It provides fully cross-connect between all tributaries, and can be used as Terminal Multiplexer (TM) or an Add-Drop-Multiplexer (ADM) to build point-to-point, ring and chain transmission network. Feature # Achieve Multiplexing from 63 E1 to 2 STM-1 optical interfaces # 1U height, 19 Inch width standard # Service interface * Two STM-1 optical interfaces, SFP optical module (LC connector) * Maximum 63 E1 interfaces compliant with ITU-T G.703, optional unbalanced/ balanced interface # System interface * Ethernet management interface: EMU (RJ45 connector) * RS232 network management interface: CONSOLE (RJ45 connector) * RS232 user channel interface: RS232 (RJ45 connector) * External synchronization interface / Extendable management interface : ETS1/EXM1, ETS2/EXM2 (RJ45 connector) * Engineering Order Wire (EOW) interface: PHONE (RJ11 connector) * UALM and DALM output interface: U/DALMO (DB9 connector) # Timing mode * STM-1 line timing (T11,T12) * Tributary timing from E1-1 to E1-63 (T2) * External timing source input (T31/T32), 2048Kbit/s by default and 2048KHz selectable * External timing output (T41/T42), 2048Kbit/s by default and 2048KHz selectable * ITU-T G.813 internal oscillator * The timing source can be auto-switched according to SSM or operator settings # Supports 1+1 protection and Automatic Protect Switch (APS) with the switching time less than 50ms # Supports Remote power Down Detection (RPD) and Auto Laser Shutdown (ALS) # Supports embedded BERT and various loop back for troubleshooting # Highly efficient management system * Supports NE management based on CLI command via RS232 interface or TELNET * Supports Network management based on PC via unified platform: GTVIEW * Supports three network management types: Traditional DCC management, Inner DCN management (by some VC12 channel) and outer DCN management (by E1 cable via outer EXM interface). # Power system * Two backup power supply * 220V AC or-48V DC single power * -48V DC & 220V AC double power * -48V DC & -48V DC double power * 220V AC & 220V AC double power * Power consumption less than 25W Technical Parameter System Fabric * Cross Connect: 4* 4 VC-4 Optical Interface * Optical Port: S1.1, L1.1, L1.2 * Connector: SC, FC * Wavelength: 1310nm, 1550nm * Coding: NRZ * Max. Spectrum Width(RMS): G.957 * Max. Tx Power: -8/ 0dBm * Min. Tx Power: -13/ -5dBm * Extinction: 8.2/ 10dB * Rx Sensitivity: -28/ -34dBm, BER 10-10 * Rx Overload: -8/ -10dBm, BER 10-10 E1 Interface * Coding: HDB3 * Bit Rate: 2.048Mb/s + 50ppm * Connector: BNC (75) / RJ45 (120) * Standard:ITU-T G.703,G.704,G.823 ETS/EXM interface * Line Clock: E1, STM-1 Optical Link * Internal Clock: Internal Oscillator * Bit rate:2.048Mb/s, 50ppm * Impedance: 120 balanced Ethernet management interface(EMU) * Bit rate: 100Mb/s * Connector: RJ45 Operation Environment * Working Temperature: -10C~ 70C * Storage Temperature: -40C~ 85C * Relative Humidity: 5%~ 95%, non-condensing * No corrosive and solvent gas, no dust and heavy EMI * Power Supply: AC 220V, DC -48V * Power consumption: 25W, 10% * Physical Dimension: 484mm, 44mm, 255mm (width , height , depth).