not able to connect pdu model AP8959

[Anonymous user]

I connect APC PDU serial port with console cable with the following configuration,

RJ-12          DB-9

2----------------5

3----------------2

4----------------3

I use HyperTerminal software for serial connection, with following settings,

57600 baud rate, 8 data bit, no parity, 1 stop bit, no flow control

but I am unable to communicate with PDU. I use the following procedure,

1- press reset button for 2 seconds and instantly press enter 5 to 10 times in hyper terminal software,

 but no display on hyper terminal.

2- press enter 5 to 10 times and then press the reset button, but the same result.

I checked following,

i- the computer is directly connected to serial port of PDU,

ii- computer's com port is enabled,

iii- no services using com port,

iv- scroll lock button is not pressed.

What should I do for communication with PDU? 

because my PDU is not responsive currently, as no display is on PDU.

red coloured led is on status.

[BillP · Accepted solution]

hello , you need to use an original APC cable , the part number is 940-0144 , then you can  Run a terminal program (such as HyperTerminal®) and configure the selected port for 9600 bps, 8 data bits, no parity, 1 stop bit, no flow control.

you cant do it with another communication  cable.

[owendelong]

I am using the correct cables (with a USB adapter) on a pair of AP8959 units. I can connect to both units, but all I get is weird symbols at random intervals. It's basically as if the baud rate or serial parameters are wrong, but I am definitely using 57600,cs8,-parenb,-ixon,-ixany,-crtscts and the system definitely defaults to 1 stop bit (screen on a Linux system).

I've tried other baud rates as well with no luck. (2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400).

Any other suggestions?

[dpierce4776]

The correct hyperterminal settings are 9600 8 1 none none.

If that doesn't work then you most likely have a bad cable.