Pinouts Database - DEC VAXstation Connector Pinouts

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DEC VAXstation

6-pin modified modular jack (MMJ) used for serial ports on the VAXstation.

DEC carries four DB-to-MMJ adaptors. They are internally wired as follows

                   Rdy Out  TX+  TX-  RX-  RX+  Rdy In            
 Adaptor   Gender     1      2    3    4    5     6       Use with:
--------------------------------------------------------------------------
 H8575-A     F      20      2    7    7    3    6&8     VTxxx terminal
 H8571-C     M       6      3    7    7    2     20     DEC printer
 H8571-D     M       6      3    7    7    2     20     Modem
 H8571-E     M      20      2    7    7    3    6&8     Female terminal
                                                        or LaserWriter
--------------------------------------------------------------------------

RS-232 using DB-25 connectors:

Pin Number	Signal Name		DTE Terminal or Computer		DCE Modem
2	TD	Transmit Data		-->
3	RD	Receive Data		<--
7	GND	Ground		---
6	DSR	Data Set Ready		<--
8	DCD	Data Carrier Detect		<--
20	DTR	Data Terminal Ready		-->

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