SUN SPARCstation 4, 5, 10, 20, LX, Classic, Classic X, Ultra Enterprise 450 Serial 25 pin

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Image:connector_dsub25f.png 25 pin D-SUB female connector at the computer.

Image:connector_dsub25m.png 25 pin D-SUB male connector at the cable.

This port is located in SUN Sparcs such as SUN LX/Classic/SS4/5/10/20 and has both serial ports (A/B) in the same connector. Simply plugging in a regular serial cable in results in accessing port A.

Pin Name Port Dir Description
2 TXD A OUT Transmit Data
3 RXD A IN Receive Data
4 RTS A OUT Request to Send
5 CTS A IN Clear to Send
6 DSR A IN Data Set Ready
7 GND - - System Ground
8 CD A IN Carrier Detect
11 DTR B OUT Data Terminal Ready
12 CD B IN Carrier Detect
13 CTS B IN Clear to Send
14 TXD B OUT Transmit Data
15 TC A IN Transmit Clock from DCE, usually not used
16 RXD B IN Receive Data
17 RC A IN Receive Clock from DCE, usually not used
18 TC B IN Transmit Clock from DCE, usually not used
19 RTS B OUT Request to Send
20 DTR A OUT Data Terminal Ready
21 TCO A OUT Transmit Clock from DTE, usually not used.
25 TCO B OUT Transmit Clock from DTE, usually not used.

Notes

  • Direction is DTE (Computer) relative DCE (Modem).
  • Do not connect SHIELD(1) to GND(7).

References

Category:Serial Connectors

 

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