Very Computer

How can I get kppp (for example; or c-kermit, for that matter) to drive
my 28.8 Kbps modem at 28800 ?  The only speed choices I get are 19200,
38400, 57600, plus of course higher and lower numbers.

--
---------------------------------------------------------------
Nick Brown, Strasbourg, France (Nick(dot)Brown(at)coe(dot)fr)

Protect yourself against Word 95/97 viruses, free - check out
 http://www.geocities.com/NapaValley/Vineyard/1446/atlas-t.html
---------------------------------------------------------------

The speed choices presented by your application are computer-to-modem
speeds.
The rated speed of your modem, 28800, is a modem-to-modem speed.  You should
set
the computer-to-modem speed as high as you can in the application.  Then
you'll get
28800 modem-to-modem, assuming your telephone line quality is good enough.
Some
modems/serial ports can only run at up to 57600: it just depends on the
hardware involved.
That's not a problem for you since you're working with 28800.  Just don't
pick 19200 since
that will effectively limit your throughput to 19200.

Good luck!

[snip]

Great !  I tried it at 57600.  Now of course KPPP says I'm "connected at
57600" which I'm not (neither my modem nor the ISP's can go faster than
28800 - the ISP does everything faster with ISDN), but it is noticeably
faster, so I presume I'm actually connected at 28800.  Thanks !

--
---------------------------------------------------------------
Nick Brown, Strasbourg, France (Nick(dot)Brown(at)coe(dot)fr)

Protect yourself against Word 95/97 viruses, free - check out
 http://www.geocities.com/NapaValley/Vineyard/1446/atlas-t.html
---------------------------------------------------------------

Actually, strictly speaking, you probably _are_ connected at 57600, but
not really... <g>

57600 is 28,800 + theoretical 2:1 compression from MNP5, or whatever
compression standard your modem & ISP both support.
BTW, MNP 5 allows for theoretical max. of 115,200, so if Kppp supports
this option, you should use it instead. Every bit of compression helps,
especially at 28.8

--
Greg White
Systems Engineer
__________________

Logicorp Data Systems Ltd.
Ste. 500 - 1130 W. Pender St.,
Vancouver, B.C.   V6E 4A4
Tel: (604)647-0261   Fax: (604)647-0155

You could probably send some init-string to your modem to make it report
the line speed instead of the serial speed.

Sometimes it can be useful with a serial speed of 115200 bps even with a
28800 bps modem. The modem has a built in compression protocol which
when downloading repeating data or simple text can give a higher speed
than 57500 bps.

regards Henrik

--
spammer strikeback:

Hi,

Try to add to the INIT string  S95=44
then after the connection is established the modem would tell you
CARRIER 28800
CONNECT 57600

Or else see http://www.math.sunysb.edu/~comech/tools/CheapBox.html#modem
for the list of vendors who sell V.90 modems for $40-$50 and fly at
CARRIER 48000
CONNECT 115200

Cheese,
Andrew

Thanks... I'm torn between staying with my current ISP (who are a very
professional, Linux-friendly outfit) and upgrading to ISDN, or going to
someone else with V90 and keeping my current regular phone line.

--
---------------------------------------------------------------
Nick Brown, Strasbourg, France (Nick(dot)Brown(at)coe(dot)fr)

Protect yourself against Word 95/97 viruses, free - check out
 http://www.geocities.com/NapaValley/Vineyard/1446/atlas-t.html
---------------------------------------------------------------

Hi, my 1/2 of a cent:
Actually, the only reason I use a regular modem is because I
have a free dialup to my university.

I figured I _do_ want call waiting, perhaps with caller ID,
or else I will lose all my friends... In a week I will see how it
works (certainly I do not want PPP to die without warning).
Well, call waiting and caller ID is already about $15/month,
and if I'd pay additional money to ISP, then certainly I'd
get a much faster cable modem or something for $25(?)/month.
See how this compares to your situation.

Cheese,
Andrew