4 the Newbie - Null Modem Cable Pinouts

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  • zafgak
    Newbie
    • Dec 2010
    • 1

    #1

    4 the Newbie - Null Modem Cable Pinouts

    For the absolute Newbie's who do not know what the pinout is for a null modem cable -- here you go

    Signal Name DB-25 Pin DB-9 Pin DB-9 Pin DB-25 Pin
    FG (Frame Ground) 1 - X - 1 FG
    TD (Transmit Data) 2 3 - 2 3 RD
    RD (Receive Data)
    3 2 - 3 2 TD
    RTS (Request To Send) 4 7 - 8 5 CTS
    CTS (Clear To Send)
    5 8 - 7 4 RTS
    SG (Signal Ground) 7 5 - 5 7 SG
    DSR (Data Set Ready)
    6 6 - 4 20 DTR
    CD (Carrier Detect)
    8 1 - 4 20 DTR
    DTR (Data Terminal Ready)
    20 4 - 1 8 CD
    DTR (Data Terminal Ready) 20 4 - 6 6 DSR
  • RuberDuck
    Banned
    • Sep 2010
    • 1724

    #2
    why bother making one when you can get one for ?2.00 maybe ?3.00 from some well known internet sites ?

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