Information for panel indicator light：
Front panel indication：
◆ Indicator light of power supply (POWER, green    light): light at normal status;
◆ Ethernet interface full duplex indicator light   (DUP, green light): the full duplex lights when the    Ethernet interface works
◆ Ethernet interface conflict indicator light (COL,    yellow light): twinkle when the Ethernet interface    conflicts;
◆ Ethernet interface rate indicator light (10/100,    green light): light when the Ethernet interface    works at a rate of 100M;
◆ Ethernet interface working indicator light (L/A,    green light): light when the Ethernet interface    connects, and twinkle when the data flow exists ;
◆ E1 interface alarm indicator light (ALARM, yellow    light): twinkle when E1 channel generates failure,    and always light when receiving AIS;
◆ E1 interface working indicator light (WORK, green    light): light when E1 interface receives signals;
◆ System working indicator light (RUN, green light):    twinkle when the system normally works;
◆ System alarm indicator light (ALARM, yellow    light): light when the system generates alarm;
◆ System E1 terminal-to-terminal alarm indicator    light: (RA, yellow light): light when TST-CON02F    terminal-to-terminal FE1 frame loses synchronism;
◆ Frame losing synchronism alarm indicator light   (SYNL, red light): light when the receiving E1    frame of TST-CON02F loses synchronism;

　The user can judge and understand whether the equipment link is in the normal status or not according to the instructions of indicator light of front panel, which can make the user conveniently install and maintain.

Main Technical Indexes and Functions
  ◆ Indexes of power supply :
    DC power supply voltage: -48VDC; tolerance range: -36V~-72V; power supply ripple:     ≤240mVp-p
    AC power supply voltage：220VAC±20% 50HZ, power dissipation ：≤10W
  ◆ Indexes of Ethernet interface :
    Physical interface type: RJ-45
    Interface specification: conform to IEEE-802.3u standard
    Interface rate: 10/100M self-adapting
    Network bridge parameter: the filtering and transmitting rate reaches 15,000 frames     per second
             256-frame buffer
             10,000 MAC address LAN table
             Self-study and update function
             Increased Tiny Gram compressed mode
  ◆E1 electrical interface index Number of sub-circuit: one
    Nominal rate: 2048Kbps, tolerance±50ppm
    Interface code pattern: HDB3
    Interface impedance: 75Ω (imbalance)
     Electrical characteristics of digital interface: conform to ITU-TG703 suggestion
     Input jitter tolerance: conform to ITU-TG.823 suggestion
     Input jitter: conform to ITU-TG823 suggestion
    Level ：±2.37V±10%
    Interface connector: BNC or CC4 (75Ω)
  ◆ Management interface characteristics
    Interface mode: RS-232
    Interface level: RS-232 level
     Interface connector ：RJ-45
  ◆Environmental demand
    Working environment: environmental temperature ：0℃~45℃ relative humidity ：  ≤85%（ 35℃）
     Atmospheric pressure ：86-106Kpa
  ◆ External dimensions ：200×145×35mm

Instructions for DIP Dial Switch
   Dial switch (SEL): when the equipment parameters are set as the dial switch configuration, the dial switch is effective. MSEL is used to select the maximal packet length that the Ethernet can pass through. The selective maximal packet length for ON is 1518/1522; the selective maximal packet length for OFF is 1536/1536. TSEL is used to select the clock of transmission E1line; OFF adopts the local clock to select the transmission of E1 line; ON adopts the restored clock to select the transmission of E1.