[plug] ppp dialup problems

[BillK]

at commands were originally by Hayes.  Do a net search on "hayes command
set".  Note that there are the usual variations on the standard.

very useful are at&v, at&v0, at&v1, which should list the profiles,
current profile and backup profile respectively.  at&0 and at&1 are not
supported by my current modem tho.

Ive seen two things give these symptoms - a speed mismatch/overspeed on
the port - what are you using, irq etc as well as handshaking (always
should use hardware) drops out at too high a speed depending on
processor/modem/processor load ...

and a busted/intermittant serial cable or possibly a one that does not
have all pins connected (i.e., a cheapie) - if some of the handshake
lines come adrift, speed overuns/data corruption is inevitable.

And another one, what com port are you using - should not be com 3 if
you are using com 1 for a mouse, seen that too, but was a slow 486.

BillK


> 
> Something seems a bit odd. When I run minicom it definitely talks
> to the modem, but the data it displays is rubbish (non-ascii
> characters). I tried a couple of the AT commands people mentioned
> here, and something seems to happen but of course it is a bit hard
> to tell when you can't read the output. I tried "ATD" (which I
> assume is a dial command) - the "OH" light came on and the modem
> made that noise that it normally makes just before dialling.
> 
> Any idea why the minicom output would be strange? Any pointers
> to documentation of the AT commands?
> 
> Regards,
> 
> Bruce.