PPP server doesnt't support 56K speed (by RH6.0)

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On Tue, 2 Nov 1999, Robert J. Brown wrote:

> >>>>> "Singh" == S K Singh <sks@goat.up.nic.in> writes:
> 
>     Singh> On 3 Nov 1999, Phidias Kang wrote:
> 
>     >> Hi! This question make me sick for awhile...  My system is
>     >> RedHat 6.0, with 56K modem.  I had made it well to received PPP
>     >> dial-in by mgetty&autoppp, but i don't know why i can't connect
>     >> to my ppp server by highspeed, each time i dial in my server, i
>     >> can only get about 26400 or 24400 bps
>     >> 
>     >> I had used "setserial /dev/ttyS1 spd_vhi" and add "115200" at
>     >> /etc/ppp/options.ttyS1
>     >> 
>     >> Check my /var/log/messages, i found such messages : Oct 12
>     >> 13:21:25 goat modprobe: can't locate module ppp-compress-21 Oct
>     >> 12 13:21:25 goat modprobe: can't locate module ppp-compress-26
>     >> Oct 12 13:21:25 goat modprobe: can't locate module
>     >> ppp-compress-24
> 
>     Singh> Hi Kang, Plese reconfigure your /etc/conf.modules and
>     Singh> insert follwing
> 
>     Singh> alias ppp-compress-21 bsd_comp alias ppp-compress-24
>     Singh> ppp-deflate alias ppp-comprtess-26 ppp-deflate and
>     Singh> reactivate the modules file.
> 
Hi I was just pointing to file compression under PPP which was not
configured in Kangs Box. One mistake in typing Kang may please correct.
Instead of ppp-deflate its ppp_deflate.

Thanks


>     >>  Is it the reason that make connection under so slow? How can i
>     >> solve it?
>     >> 
>     >> By the way, anyone can tell me how to check who is ONLINE PPP
>     >> user?
>     >> 
>     >> Thanks for your help!
> 
> No, that won't help.  It is a hardware problem.  A 56K modem sends at
> 56K, but only receives at 28.8K.  :-(
> 
> This is because of analog bandwidth limitations on the phone line.  If 
> you want to be able to act as a server and receive calls and send data 
> to the caller at 56K, then you must be on a digital line, such as
> ISDN.  The USR Courrier I-modem from 3com will do the trick, but you
> must also have an ISDN line at the server end.  The caller can be on
> an analog POTS line, but the server must be on ISDN with appropriate
> equipment, such as the I-modem.
> 
> -- 
> --------  "And there came a writing to him from Elijah"  [2Ch 21:12]  --------
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