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

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>>>>> "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.

    >>  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.

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