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6 pin RJ12 (6P6C) female connector layout
Разъем 6 pin RJ12 (6P6C) female
RJ12 to DB9. Compatible with Rack PDU (AP78xx, AP79xx, AP86xx, AP88xx, AP89xx) and 2G Rack Automatic Transfer Switches (AP7752, AP7752, AP7730, AP7732, AP7721, AP7723). APC part # 940-0144A
Pin Number
Pin Number
1 1 (*)
2 5 (GND)
3 2 (RX)
4 3 (TX)
5 (GND) 5
6 1 (*)

(*) APC pins 1 and 6 are usually not connected

Set 9600 bps, 8 data bits, no parity, 1 stop bit, and no flow control to communicate.

Apply the port settings to establish the connection.
Press 3-5 times to display the username prompt.
Use the default username and password of apc

It is possible to use RJ11 plug that has only the middle 4 pins (2,3,4,5). connected APC pins 2,3, and 4 only and it workes perfect. Swap the RX and TX pins if you get nothing. Try to tie both ground pins on DB9 to RJ11.

Have used RJ12 plug to connect to APC 7752. RJ12: P2,P3,P4,P5 were connected to DB9: P5, P3, P2, P8.
May need to click Enter a few times, if using PuTTY.

9 pin D-SUB female connector layout
Разъем 9 pin D-SUB female
На распиновку APC RJ12 serial cable есть 44 отзыв(а): 43 положительных и 0 отрицательных.

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