DSU 56/64 Interface Pinouts

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    Article ID: 1583



      DSU 56/64 Interface Pinouts



    DSU 56/64 DSU 56/64 Interface Pinouts




    The following charts give the pin assignments for the DSU 56/64 interfaces. They can also be found in the DSU 56/64 User Manual, Chapter 2. Installation.

    Network Connections

    This interface consists of four leads paired to provide separate transmit and receive circuits. The four leads are provided on the eight position modular jack (RJ-48S) labeled TELCO on the rear panel of the DSU 56/64.

    Pin NumberFunctionSignal Direction
    1Transmit Data (R)From Customer to Network Interface
    2Transmit Data (T)From Customer to Network Interface
    3-6Not Used
    7Receive Data (T-1)From Network Interface to Customer
    8Receive Data (R-1)From Network Interface to Customer



    DTE Pin Assignments

    The data terminal equipment is attached to the connector labeled PRIMARY V.35 at the rear of the DSU 56/64. The maximum cable length recommended is 100 feet. The primary DTE rate is configured from the front panel and can operate in asynchronous or synchronous modes.


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



    A101Protective Ground (PG)
    B102Signal Ground (SG)
    C105Request to Send (RS)
    D106Clear to Send (CS)
    E107Data Set Ready (SR)
    F109Received Line Signal Detector (CD)
    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)