Imam instaliran Red Hat7.1 i modem USRobotics 33.6 Sporster
 Hardware Plug & Play .Pri instaliraneto na Red Hat 7.1 beshe
 otkrit i configuriran avtomatichno . Nastroika na internet
 vdyzkata  napravih  v KDE s  Kppp pogramata kakto pishe v
 helpa kym neia.Kogato se connectna  modema se svyrzva  s
 servera na  ISP, no predi da proveri usera i parolata 
 vryzkata se prekysva i modema zapochva da nabira
 otnovo.Prochetoh podrobno helpa i FAQ kym Kppp no nemoga da
razbera prichinata za tova.
 Shte sym blagodaren na vseki koito moje da mi kaje zashto se
kysa vryzkata taka

Eto nastroikite koito sym zadal :
modem device /dev/modem;
flow control CRTSCTS;
line termination CR/LF;
connection speed 57600 ;
use lockfile  ne e posochen ;
modem time out 30s;
 busy wait 6s;initialization string ATX3;
 dial string ATDP;
hangup string +++ATH;
 authentication PAP;
dinamic IP address;
defalt gateway;
DNSserver auttomatic;
 /etc/ppp/options e prazen

 pich vij kyv protokol izpolzva ISPto ti PAP ili CHAP shtoto
moje i tva da e problema , obadi se i gi pitai

/etc/ppp/options ne triabva da  e prazen. Sazdai si go.

# /etc/ppp/options.ippp?
#
# for isdn4linux/syncPPP and dynamic IP-numbers
#
#
# Klaus Franken, kfr@suse.de
# Version: 27.08.97 (5.1)
#
# This file is copy by YaST from /etc/ppp/ioptions.YaST
#   to options.<device>

# The device(s)
# for more than one device try:
# /dev/ippp0 /dev/ippp1 ...
/dev/ippp0

# The IP addresses: <local>:<remote>
# just "0.0.0.0:" or nothing for dynamic IP
#0.0.0.0:

# The netmask
# it should be 255.255.255.255
#
netmask 255.255.255.255

# my user name
users suse

# my system name (only for CHAP!)
# name my_system_name
name suse

# accept IP addresses from peer
# use with dynamic IP
ipcp-accept-local
ipcp-accept-remote
noipdefault

# default route should be set by ipppd
# defaultroute

# try to get IP address from interface
# option specific to ipppd (as opposed to pppd)
# use only with static IP
#useifip

# disable all header-compression
-vj
-vjccomp
-ac
-pc
-bsdcomp

# max receive unit
mru 1524
# max transmit unit
mtu 1500

# If this machine is a server, force authentication by 
uncommenting one
 # of the following. However, if this machine is a client,
doing 
this will
 # prevent a succesful connection! (message "peer refused to

authenticate").
# So, only uncomment on a server.
# "+pap" / "+chap" NUR AKTIVIEREN, WENN DIES EIN 
SERVER IST!!!
#+pap
#+chap

 # if you have problems with handshaking (no response for
first
 # lcp-package) try to decrease the retry-cycle. Default is 3
sec,
# try for example 2 sec:
# lcp-restart 2
# sometimes you need this:
noccp

# Get dns info from peer
ms-get-dns

Tova e nesto podobno, moge da go promenish za tvoia slu
4ai.