DSU IV ESP Interface Pinouts

Version 1
    Article ID: 1601
    Q&A

     

     

      DSU IV ESP Interface Pinouts


     

    Q:

    DSU IV ESP Interface Pinouts

     

     

    A:

    The following charts give the pin assignments for the DSU IV ESP interfaces. They can also be found in the DSU IV ESP User Manual.

    Pin Assignments for Telco Connector

    PinNameDescription
    1R1Transmit Data from DSU to Network-Ring 1
    2T1Transmit Data from DSU to Network-Tip 1
    3-6-Not Used
    7TReceive Data from Network to DSU-Tip
    8RReceive Data from Network to DSU-Ring

     

     

    Pin Assignments for ESP DBU Card Connectors

    PinNameDescription
    4-wire Switched 56
    1R1Transmit Data from DSU to Network-Ring 1
    2T1Transmit Data from DSU to Network-Tip 1
    3-6-Not Used
    7TReceive Data from Network to DSU-Tip
    8RReceive Data from Network to DSU-Ring
    V.34 and 1B+D ISDN
    1-3-Not Used
    4TNetwork-Tip
    5RNetwork-Ring
    6-8-Not Used

     

     

    DTE Pin Assignments

    The DTE should be connected to either the EIA-232 DTE connector or the CCITT V.35 DTE connector. The maximum cable lengths recommended are 50 feet for the EIA-232, and 100 feet for the CCITT V.35.

     

    The V.35 connector is recommended for use with data rates above 19.2 kbps. The EIA-232 connector works up to 56 kbps with a low capacitance cable or with the external transmit clock option selected. The DTE rate is configured from the front panel. The DTE can operate in asynchronous or synchronous modes.

     

    To prevent possible radio frequency interference emissions, a shielded cable is required.

     

     

    Pin Assignments for EIA-232 Connector

    PinEIADescription
    1AAProtective Ground (PG)
    2BATransmit Data (SD)
    3BBReceive Data (RD)
    4CARequest to Send (RS)
    5CBClear to Send (CS)
    6CCData Set Ready (SR)
    7ABSignal Ground (SG)
    8CFReceived Line Signal Detector (CD)
    9-+12 Test Point
    10--12 Test Point
    15DBTransmit Clock (TC)
    17DDReceive Clock (CR)
    18-Local Looback (LL)
    20CDData Terminal Ready (TR)
    21-Remote Looback (RL)
    22CERing Indicator (RI)
    24DAExternal TX Clock (ETC)
    25-Test Indicator (TI)

     

     

    Pin Assignments for V.35 Connector

    PinCCITTDescription
    A101Protective Ground (PG)
    B102Signal Ground (SG)
    C105Request to Send (RTS)
    D106Clear to Send (CTS)
    E107Data Set Ready
    F109Received Line Signal Detector (CD)
    H-Data Terminal Ready (DTR)
    J-Ring Indicate (RI)
    L-Local Loopback (LL)
    N-Remote Loopback (RL)
    R104Receive Data (RD-A)
    T104Receive Data (RD-B)
    V115Receiver Signal Element Timing (SCR-A)
    X115Receiver Signal Element Timing (SCR-B)
    P103Transmitted Data (SD-A)
    S103Transmitted Data (SD-B)
    Y114Transmitter Signal Element Timing (SCT-A)
    AA114Transmitter Signal Element Timing (SCT-B)
    U113External TX Signal Element (SCX-A)
    W113External TX Signal Element (SCX-B)
    NN-Test Indicator (TI)

     

     

    Pin Assignments for Control Connector

    RJ Pin#FunctionDirection
    1GND
    2RTSI
    3TDI
    4DSRO
    5RDO
    6CTS*O
    7-Not Used
    8-Not Used
    *Used for hardware flow control.

     

     

    Pin Assignments for 10BaseT Connector

    PinNameDescription
    1TD+The positive signal for the TD differential pair. This signal contains the serial output data stream transmitted onto the network.
    2TD-The negative signal for the TD differential pair (pins 1 and 2).
    3RD+The positive signal for the RD differential pair. This signal contains the serial input data stream received from the network.
    4, 5N/ANot Used
    6RD-The negative signal for the RD differential pair (pins 3 and 6).
    7, 8N/ANot Used