It's probably a cable problem. Following are pinouts for cable I
constructed to connect to old 1924 and 2820 with DB-9 connectors using
HyperTerminal.
DCD 1 - 8 CTS 7 and 8 connected
7 RTS
RxD 2 - 3 TxD
TxD 3 - 2 RxD
4 No connection
Gnd 5 - 5 Gnd
RTS 7 - 1 DCD
CTS 8 7 and 8 connected
9 No connection
David
> Thanks!
>
> I'll give it a try.
>
> Jon
>
>
> Paul Werner <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Yes, I have experienced this several times. It is the dreaded
> > Catalyst switch who thinks it is talking to a modem :-) Here
> > are my recommended fixes in this order:
> >
> > 1. Get a known good black console cable. Get several. Try
> > each one out and see if any will get the console to come up
> > other than ATQ commands.
> >
> > 2. Change out your DB-9 to RJ-45 converters with others that
> > are known/good. See if that works.
> >
> > 3. Finally, and lastly, change out to other COM ports/other PC
> > COM ports to see if that will help. In the three times I had
> > this scenario, only once did I have to go to step 3.
> > Obviously, it goes without saying that you need to ensure you
> > have the correct COM port settings(9600,8,N,1,) particularly
> > with flow control turned *off*.
> >
> > 4. If all else fails, upgrade the firmware to something
> > older/newer (experiment here). Yes, I know it is fun sucking a
> > 1MB image through a 9600bps line, but that's what a cup of
> > coffee is for 8-)
> >
> > 5. If this one is so old that it has one of those DB-9 console
> > connectors on the back of the switch (vice the newer RJ-45),
> > you may need to order Cisco's OEM console cable for that box,
> > or you will need to build a null modem cable as specced out
> > here (watch wrap):
> >
> > http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/192
> > 8v5x/icg5x/csspec.htm#41267
> >
> > You are on the right track if you can access the diagnostic
> > console. Lastly, strongly resist the temptation to throw the
> > switch against the wall. It may be needed for an RMA:-)
> >
> > Best of luck,
> >
> > Paul Werner
> >
> >
> > > Date: Sun, 7 Jan 2001 17:45:17 -0500
> > > From: "Jon O'Nan" <[EMAIL PROTECTED]>
> > > Subject: ATQ0H0
> > >
> > > I've been working with an older Catalyst 1900 switch
> > (firmware ver 5.37)
> > > We
> > > can't get any management console output. We are able to bring
> > up the
> > > diagnostic console by holding in the mode button on the front
> > of the
> > > switch
> > > while turning on the power. After upgrading the firmware via
> > xmodem, the
> > > switch will POST and then leave us with a blsnk screen except
> > for modem
> > > strings ATQ0H0. Anyone ever experienced the same issue?
> >
> >
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> >
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>
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