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Other Signals     

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OTHER RS-232 SIGNALS

Pin 23, the Data Signal Rate Selector, is used to select between multiple transmission speeds when a modem is so equipped.

Pins 12, 13, 14, 16, and 19 define a secondary data channel, complete with data, timing, and control signals. There was a time when a higher speed primary channel was used in conjunction with a lower speed secondary channel. The secondary channel is, for all intents and purposes, obsolete.

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General Overview ] RS-232 Standard ] Bit Encoding ] Character Encoding ] Data Errors ] Physical Circuit ] DTE and DCE ] DB-25 Connection ] Control Signals ] Break-Out Box ] Directional Signals ] Connecting DTE's ] Async & Sync ] [ Other Signals ] Custom IC's ] RS-423 ] RS-422 ] Modems ]

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