URGENT: COM1 Port - Console Management - Issues

Hello all,

Kind of a funny question really. I don't think I am losing my marbles but I'll go ahead away.

Received two management switches both seem to be unresponsive via a serial link. Using Tera Term for this.

What I've tried:
Physical and logical loopback on the serial port (local echo and loopback via the physical pins (it's a IDC10 to serial DB9 bracket))
Changing Baud rate, default for this switch is 19200, also tried lowering the receive and transmit buffer
Tried both a straight-through and NULL modem cable
Tried every terminal IDs as it wasn't listed in the documentation, however my other switch is VT100 which Tera Term supports
Attempted Telnet using the default IP settings on both switches... to no avail, which is extremely odd, should at least connect

Where I bought it from (eBay) have very high reputation and they have listed these as used however fully tested and working. They apparently have been reset however I cannot even Telnet in using the default settings.

So, my only suspicion is that I have in fact received another straight-through DB9 serial cable which won't work. Both devices (serial port -> switch) are DTEs for communication.

Both switches use standard RS232 DB9 serial cable.


Just odd I can't even Telnet in considering these switches are supposed to be reset (default IP settings are provided within the manual).


Any suggestions?

I suggest that if you use serial ports you need some sort of LED box. Ideally a break out box so that you can turn it into whatever sort of cable you need. Honestly, I have known people waste days on this stuff and one glance at which LEDs are lit tells you exactly what is going on.

http://www.ebay.co.uk/bhp/rs232-tester

A null modem is not the same as a crossover cable, suppliers get them confused, it is a minefield.

You know what I mean, internal wiring is crossed over :P I have ordered a new cable now in case the seller didn't really know which was a straight-through and what was a NULL cable.

I'll have a check ;) that LED box will come in handy thanks!

That's only problem with the bay, sellers selling things that may or may not match the standards of things :(

Well what do you know, it was the cable after all :P

That\'s eBay sellers for you.

Can\'t say I am surprised.

I think I bought my LED box from Maplins but that was probably 10 years ago. Not sure where you could buy one these days.

Quote:

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Originally Posted by DanceswithUnix

Can't say I am surprised.

I think I bought my LED box from Maplins but that was probably 10 years ago. Not sure where you could buy one these days.

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I contacted the seller and she asked me "What resolution are you running at" and blatantly ignored what I was talking about.

Just pot luck buying cables on eBay, some know the technicalities of it and some don't unfortunately. Up to the suppliers there ;)