EIA232 Pin Description Index
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Note that these pin assignments are from the DTE side of the connection!
The most commonly used signals are shown in bold.
Shell - Shield
Pin 1 - Shield
Pin 2 - Transmitted Data
Pin 3 - Received Data
Pin 4 - Request to Send
Pin 5 - Clear to Send
Pin 6 - DCE Ready
Pin 7 - Signal Ground
Pin 8 - Received Line Signal Detect
Pin 9 - (reserved for testing)
Pin 10 - (reserved for testing)
Pin 11 - (unassigned)
Pin 12 - Secondary Received Line
Pin 13 - Secondary Clear to Send
Pin 14 - Secondary Transmitted Data
Pin 15 - Transmitter Signal Timing
Pin 16 - Secondary Received Data
Pin 17 - Receiver Signal Timing
Pin 18 - Local Loopback
Pin 19 - Secondary Request to Send
Pin 20 - DTE Ready
Pin 21 - Remote Loopback
Pin 22 - Ring Indicator
Pin 23 - Data Signal Rate Selector
Pin 24 - Transmitter Signal Timing
Pin 25 - Test Mode
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