  | 
     | 
    Circuit 
    102 
    103/TD 
    104/RD 
    105/RTS 
    106/CTS 
    107/DSR 
    108/DTR 
    109/DCD 
    113/SCT 
    114/SCT 
    115/SCR 
    125/RI 
    140/RL 
    141/LL 
    142/TI | 
    Pin 
    B 
    P-S 
    R-T 
    C 
    D 
    E 
    H 
    F 
    U-W 
    Y-AA 
    V-X 
    J 
    N 
    L 
    NN | 
    Designation 
    Signal Ground 
    Transmit Data 
    Receive Data 
    Request To Send 
    Clear To Send 
    Data Set Ready 
    Data Terminal Ready 
    Data Carrier Detect 
    Serial Clock Transmit (from DTE) 
    Serial Clock Transmit (from DCE) 
    Serial Clock Receive 
    Ring Indicator 
    Remote Loop Back 
    Local Loop Back 
    Test Indicator |