TITLE
    IBM PC/AT Serial Connector: DB-25 Equivalent Pinouts
Article ID:
Created:
Modified: 		2670
3/22/88
06/17/92
TOPIC

DISCUSSION



    TOPIC ----------------------------------------------

    Can you give me the RS-232 (DB-25) equivalent pinouts for the IBM PC/AT
    (DB-9) serial connector?

    DISCUSSION -----------------------------------------

    Here are the RS-232 (DB-25) equivalent pinouts for the IBM PC/AT
    (DB-9) serial connector:


    IBM PC/AT         DB-25 (DTE)
    DB-9           equivalent
    ---------         -----------
    1             8      (CD)
    2             3      (RXD)
    3             2      (TXD)
    4             20     (DTR)
    5             7      (SG)
    6             6      (DSR)
    7             4      (RTS)
    8             5      (CTS)
    9             22     (RI)

    Reference
    ---------
    RS-232 Signal (DB-25)

    1 - Sig Gnd: Normally Shield or Chassis Ground
    2 - TXD: Transmit Data
    3 - RXD: Receive Data
    4 - RTS: Request to Send
    5 - CTS: Clear to Send
    6 - DSR: Data Set Ready
    7 - GND: SIGNAL Ground
    8 - DCD: Data Carrier Detect
    20 - DTR: Data Terminal Ready
    22 - RI: Ring Indicate



Document Information
Product Area: Computers; Peripherals
Category: Cables
Sub Category: Serial

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