🚀 go-pugleaf

Marc Clayton wrote:
> 
> I have a USR Courier 33.6 V.Everything connecting my linux proxy server
> through a dedicated dial-up to my ISP with another USR Courier 33.6
> V.Everything - the modems appear to be set correctly but they will only
> connect at 19200. I was under the impression that 28.8 was attainable
> approaching 38400 on a good phone line day. Phone Company's GTE.
> 
> Any suggestions no �)
> �L�j��Ea�\@uY/����

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hhmm... zapped by lightning?

Anyways, about the problem.. are you sure it is
connecting at 19200?  Or is that just the message
the modem gives you on connect? (CONNECT 19200).
I have a 14400... which gives me very strange
messages like CONNECT 115200 and CONNECT 2400,
even when it is connecting at 14400!  But, if the
speed is actually slow, you may have port settings
incorrect.. dunno.

Regards

James

Did you try setserial /dev/cuaX to see if your port is set to spd_vhi? 
If it's not that would really drag things down.

Bill


Marc Clayton wrote:
> 
> I have a USR Courier 33.6 V.Everything connecting my linux proxy server
> through a dedicated dial-up to my ISP with another USR Courier 33.6
> V.Everything - the modems appear to be set correctly but they will only
> connect at 19200. I was under the impression that 28.8 was attainable
> approaching 38400 on a good phone line day. Phone Company's GTE.
> 
> Any suggestions no �)
> �L�j��Ea�\@uY/����

wOO�M��P�v�340 send article to be posted. End with <CR

-- 

Bill Brittain
brittain@erols.com

do a "man setserial", add command to rc.local. Need to set your port
to high speed.
-- 
Tom Evans   tjevans@raleigh.ibm.com
All disclaimers apply...

If you have a point to point connection and are running "pppd" then you
can specify the serial device and speed when you start "pppd".

Example:
  /usr/sbin/pppd /dev/ttyS1 38400 ...
where ... stands for other parameters passed to "pppd".

This is what I do. Of course you may have to change ttyS1 to the
appropriate device. I'm using a USR 33.6k internal fax/modem and I
typically connect at 31.2k with this setting.

Reply to: rcooper@pangea.ca (mail checked weeknights / weekends)
          rcooper@ism.ca (mail checked weekdays, business hours).=20

On Mon, 10 Nov 1997, Bill Brittain wrote:

> Did you try setserial /dev/cuaX to see if your port is set to spd_vhi?=20
> If it's not that would really drag things down.
>=20
> Bill
>=20
>=20
> Marc Clayton wrote:
> >=20
> > I have a USR Courier 33.6 V.Everything connecting my linux proxy server
> > through a dedicated dial-up to my ISP with another USR Courier 33.6
> > V.Everything - the modems appear to be set correctly but they will only
> > connect at 19200. I was under the impression that 28.8 was attainable
> > approaching 38400 on a good phone line day. Phone Company's GTE.
> >=20
> > Any suggestions no =E0)
> > =94L=C0j=8B=C9=08Ea=93\@u=06Y/=CF=C8=F5=80=01=01=14w=04=1C=1EOO=88M=CB=
=D9P=18=1C=CEv=9C340 send article to be posted. End with <CR
>=20
> --=20
>=20
> Bill Brittain
> brittain@erols.com
>=20

Thanks Bill. 

proxy:~# setserial /dev/cua0
/dev/cua0, UART: 16550A, Port: 0x03f8, IRQ: 4

That's what it tells me. I changed to init 5 and typed the command below
with the result below.

proxy:~# setserial /dev/cua0 spd_vhi

proxy:~# setserial /dev/cua0
/dev/cua0, UART: �)
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Esop�9w��*0	:�
Q�43200's down here that might be quieter 
> but they won't handle the dual forms you want. I'll try to 
> find something suitable by Wednesday. Keep reminding me 
> though if you would please.
> 
> It's amazing what can get done when the right people get 
> annoyed, isn't it?
> 
> I've also got to get one or both of these modems working! 
> Another 

In article <01bcee2a$b6ec2e20$14010180@ns.almaco.com>,
	"Marc Clayton" <claytonm-ns-@almaco.com> writes:
> I have a USR Courier 33.6 V.Everything connecting my linux proxy server
> through a dedicated dial-up to my ISP with another USR Courier 33.6
> V.Everything - the modems appear to be set correctly but they will only
> connect at 19200. I was under the impression that 28.8 was attainable
> approaching 38400 on a good phone line day. Phone Company's GTE.
> 
> Any suggestions?

Hi,

Maybe your phone's local loop is that bad, but thats pretty bad. ;)
I have to settle with 21.6-24.0 K connects.  Have you called your 
server from different locations? 

The average 'useable' bandwidth of a phone line is 2400 Hz. The phone 
company filters anything above 3000 Hz with the remaining frequency 
subject to noise (and noise there is).

Thus, 2400 signal changes per second(Hz) with 12 bits encoded per 
signal change is 28.8 K bits-per-second.  It also means that the cost of
one lost signal is high, ie 12 bits (V.34). A 2400 baud modem encodes 
one bit per signal change on the same frequency range.
  
So its impossible to get max throughput (connect speed) without
a pristine line.  Pristine meaning at least 2400 Hz of useable
bandwidth.

I used to get 28.8 and 31.6 connects with my same ISPs from a 
different location damnit. 
   

Regards,

Dave

macabre@scf.nmsu.edu <-- spam here if necessary

  

Here in comp.os.linux.misc, Marc Clayton <claytonm-ns-@almaco.com>
spake unto us, saying:

>I have a USR Courier 33.6 V.Everything connecting my linux proxy server
>through a dedicated dial-up to my ISP with another USR Courier 33.6
>V.Everything - the modems appear to be set correctly but they will only
>connect at 19200. I was under the impression that 28.8 was attainable
>approaching 38400 on a good phone line day. Phone Company's GTE.

Interesting.  You might want to check your COM port "lock rate" (the
speed to which your serial port is configured), since if you limit your
COM ports by setting them to 19200, the modem may default to limiting
its negotiated connections to that DTE rate.

Otherwise, 19.2kbps is pretty bad for V.34+.  How are you connecting,
and can you verify your serial port settings?

-- 
  -Rich Steiner  >>>--->  rsteiner@skypoint.com  >>>---> Bloomington, MN
           OS/2 Warp 4 + Linux + Executor = PC Hobbyist Heaven!
                   The Theorem Theorem: If If, Then Then.