Product Description 4/8E PDH is developed based on the VLSI chips. Relying on the advanced multiplexing technique, 4/8E PDH realizes 4/8 E1 and 100Mb/s fast Ethernet transmission with the function of Auto-Laser-Shutdown (ALS,optional). Technology Characteristics -> Transmits 4/8 E1 and one wire speed Ethernet -> Line bit rate is 150Mb/s -> Complies with ITU-T G.703 on interface and G.742, G.823 on jitter performance -> Complies with ITU-T G.802.3 on Ethernet interface and supports auto-negotiation for 10M/100M and half/full duplex working mode -> Supports VLAN and pause follow control for Ethernet -> All necessary alarm functions, supervises the status of remote terminal -> Supports E1 tributaries loop back for network fault diagnostics -> Supplies standard order wire telephone -> Supplies one customer RS232 data channel -> Supplies RS232 for equipment management -> AC 220 or DC-48 is optional -> Single board design, 1U, and 19 Inch standard Optical interface: -> Transmit Mode : Single/ Multi-mode -> Module : Single/Double Fiber -> Interface : FC/SC/ST -> Wavelength : 1310nm/1550nm -> Distance : 2Km/40Km/60Km/120Km E1 interface: -> Bit rate : 2.048Mb/s , í+50ppm -> Impedance : 75ª+ unbalanced(Declaration is needed if 120ª+ balanced required) -> Coding: HDB3, according to ITU-T G.703 -> Jitter: complies with ITU-T G.823 and G.742. Seeing appendix Ethernet interface: -> 10M/100M through auto-negotiation -> Full/Half duplex through auto-negotiation -> Connector: RJ-45 -> See appendix for Throughput, Packing error rat, Delay, and others Order wire interface: -> Phone set: Standard 2-wire phone set -> Bandwidth: 64Kb/s -> Coding: PCM RS232 for management: -> Bit rate: 9600b/s -> Data width: 8bits -> Stop bit: 1bit -> Parity check bit: None -> Connector: DB9 (pin) RS232 for customer data channel: -> Bit rate: í_250kb/s -> Connector: DB9(pin) General characteristics -> Power : 220Ví+20% , -36 ~ -72V -> Power Consumption : < 5W -> Environment Temperature : 0íµ-50íµ -> Size : 483í-200í-44mm -> Net Weight : 2.5Kg