The man page for pppd says:

NAME
pppd - point to point protocol daemon

SYNOPSIS
pppd [tty_name] [speed] [options]

but nowwhere does it say what speeds are aceptable. If one puts a
speed it does not like, it default to 9600. But whilst 9600, 19200 and
38400 work, I've got no idea what (if any) faster connections are
possible. I only found them by trial and error - nothing is
documented.


David Kirkby
(Please reply to newsgroup).

In article <c99d2c79.0310310646.38995a6a@posting.google.com >,
see_my_signature_for_my_real_address@hotmail.com (Dr. David Kirkby) writes:
> The man page for pppd says:
>
> NAME
> pppd - point to point protocol daemon
>
> SYNOPSIS
> pppd [tty_name] [speed] [options]
>
> but nowwhere does it say what speeds are aceptable. If one puts a
> speed it does not like, it default to 9600. But whilst 9600, 19200 and
> 38400 work, I've got no idea what (if any) faster connections are
> possible. I only found them by trial and error - nothing is
> documented.

What UART does the U80 have? Is that the only serial chip you have?
prtconf should give you some good clues : >
My U2 has the zs chip set where the max baud is 38400
Agreed that its a trial and error process.

gerryt@gtconnect.net wrote:
>
> In article <c99d2c79.0310310646.38995a6a@posting.google.com >,
> see_my_signature_for_my_real_address@hotmail.com (Dr. David Kirkby) writes:
> > The man page for pppd says:
> >
> > NAME
> > pppd - point to point protocol daemon
> >
> > SYNOPSIS
> > pppd [tty_name] [speed] [options]
> >
> > but nowwhere does it say what speeds are aceptable. If one puts a
> > speed it does not like, it default to 9600. But whilst 9600, 19200 and
> > 38400 work, I've got no idea what (if any) faster connections are
> > possible. I only found them by trial and error - nothing is
> > documented.
>
> What UART does the U80 have? Is that the only serial chip you have?
> prtconf should give you some good clues : >
> My U2 has the zs chip set where the max baud is 38400
> Agreed that its a trial and error process.

I don't know and can't seem to find out - I can't seem to get the information from prtconf. I've run Magicom's sysinfo program and found
that only gave a list of chips

se0 is a "Siemens 82532 ESCC" serial device
su0 is a "82510/8250/16450/16550AF" serial device
su1 is a "82510/8250/16450/16550AF" serial device

which is not too helpful.


--

"The day Microsoft makes something that doesn't suck is probably
the day they start making vacuum cleaners." -Ernst Jan Plugge.

Dr. David Kirkby Ph.D
Author of 'atlc' http://atlc.sourceforge.net/

"Dr. David Kirkby" <drkirkby@ntlworld.com> writes:
>> > SYNOPSIS
>> > pppd [tty_name] [speed] [options]
>> >
>> > but nowwhere does it say what speeds are aceptable.
>>
>
>I don't know and can't seem to find out
>

The list of speeds in the /etc/ttydefs file is usually a good guide.

-Greg
--
Do NOT reply via e-mail.
Reply in the newsgroup.

Greg Andrews wrote:
>
> "Dr. David Kirkby" <drkirkby@ntlworld.com> writes:
> >> > SYNOPSIS
> >> > pppd [tty_name] [speed] [options]
> >> >
> >> > but nowwhere does it say what speeds are aceptable.
> >>
> >
> >I don't know and can't seem to find out
> >
>
> The list of speeds in the /etc/ttydefs file is usually a good guide.
Cheers. That solved it. I set it to 115200, which is probably all its
worth doing on a 56 k modem.
--

"The day Microsoft makes something that doesn't suck is probably
the day they start making vacuum cleaners." -Ernst Jan Plugge.

Dr. David Kirkby Ph.D
Author of 'atlc' http://atlc.sourceforge.net/

In article <3FA7DFE7.F1CF4AC5@ntlworld.com>,
"Dr. David Kirkby" <drkirkby@ntlworld.com> writes:
> gerryt@gtconnect.net wrote:
>>
>> In article <c99d2c79.0310310646.38995a6a@posting.google.com >,
>> see_my_signature_for_my_real_address@hotmail.com (Dr. David Kirkby) writes:
>> > The man page for pppd says:
>> >
>> > NAME
>> > pppd - point to point protocol daemon
>> >
>> > SYNOPSIS
>> > pppd [tty_name] [speed] [options]
>> >
>> > but nowwhere does it say what speeds are aceptable. If one puts a
>> > speed it does not like, it default to 9600. But whilst 9600, 19200 and
>> > 38400 work, I've got no idea what (if any) faster connections are
>> > possible. I only found them by trial and error - nothing is
>> > documented.
>>
>> What UART does the U80 have? Is that the only serial chip you have?
>> prtconf should give you some good clues : >
>> My U2 has the zs chip set where the max baud is 38400
>> Agreed that its a trial and error process.
>
> I don't know and can't seem to find out - I can't seem to get the information from prtconf. I've run Magicom's sysinfo program and found
> that only gave a list of chips
>
> se0 is a "Siemens 82532 ESCC" serial device
> su0 is a "82510/8250/16450/16550AF" serial device
> su1 is a "82510/8250/16450/16550AF" serial device
>
> which is not too helpful.

Helpful enough. You have the UART eg: 16550AF
and Google can take you to data sheets if you dont
know the 16550 capabilities. You should be able to push
a 16550 to 115200 but that could be limits at
the serial driver level. I get 115200 from /usr/include/sys/termios.h

I used to use "minicom" for some serial tasks. Evidently its
been absorbed by the Lorg (Linux Borgs):

http://alioth.debian.org/projects/minicom/

It may still be useful : >

gerryt@gtconnect.net wrote:

> > I don't know and can't seem to find out - I can't seem to get the information from prtconf. I've run Magicom's sysinfo program and found
> > that only gave a list of chips
> >
> > se0 is a "Siemens 82532 ESCC" serial device
> > su0 is a "82510/8250/16450/16550AF" serial device
> > su1 is a "82510/8250/16450/16550AF" serial device
> >
> > which is not too helpful.
>
> Helpful enough. You have the UART eg: 16550AF
> and Google can take you to data sheets if you dont
> know the 16550 capabilities. You should be able to push
> a 16550 to 115200 but that could be limits at
> the serial driver level. I get 115200 from /usr/include/sys/termios.h

How am I supposed to know if I have an 82510, 8250, 16450 or 16550AF
??? I list of several devices is not exactly too helpful.

Hopefully, I'll have a broadband connection in the next week or so.
Luckily broadband has just become available here at the same time my
ISP (ntlworld) has decided to change the dialup telephone numbers, but
refuses to tell me what the new numbers are. They now insist I use
some windoze software to dial a secret number - a number I'm sure I
could find by looking at the modem registers, if I could find the
right cable to connect the modem to the PC.

So I'm using freeserve to dial to the Internet for now, but hopefully
that will cease in a week or so when the broadband connection is made.
A speed of 115200 is working okay for me - I don't think there is any
point in trying any faster on a 56 k modem.


--

"The day Microsoft makes something that doesn't suck is probably
the day they start making vacuum cleaners." -Ernst Jan Plugge.

Dr. David Kirkby Ph.D
Author of 'atlc' http://atlc.sourceforge.net/

In article <3FA93A8A.81A69223@ntlworld.com>,
"Dr. David Kirkby" <drkirkby@ntlworld.com> writes:
> gerryt@gtconnect.net wrote:
>
>> > I don't know and can't seem to find out - I can't seem to get the information from prtconf. I've run Magicom's sysinfo program and found
>> > that only gave a list of chips
>> >
>> > se0 is a "Siemens 82532 ESCC" serial device
>> > su0 is a "82510/8250/16450/16550AF" serial device
>> > su1 is a "82510/8250/16450/16550AF" serial device
>> >
>> > which is not too helpful.
>>
>> Helpful enough. You have the UART eg: 16550AF
>> and Google can take you to data sheets if you dont
>> know the 16550 capabilities. You should be able to push
>> a 16550 to 115200 but that could be limits at
>> the serial driver level. I get 115200 from /usr/include/sys/termios.h
>
> How am I supposed to know if I have an 82510, 8250, 16450 or 16550AF
> ??? I list of several devices is not exactly too helpful.

Well there are man pages for (in my case) "zs"
NAME
zs - Zilog 8530 SCC serial communications driver
So the chip is a Zilog 8530
I got zs from looking at dmesg output.
Again, detective work. But the stock drivers wont go above
38400 on my Ultra 2 will they?

> Hopefully, I'll have a broadband connection in the next week or so.
Indeed. modem dial up is ancient history or for "emergencies" or
when there is nothing ELSE available.

> So I'm using freeserve to dial to the Internet for now, but hopefully
> that will cease in a week or so when the broadband connection is made.
> A speed of 115200 is working okay for me - I don't think there is any
> point in trying any faster on a 56 k modem.
There isn't..