Voila mon probleme, j arrive a initialiser le modem mais pas a me connecter dans le log, voila ce que j ai vu :
I Load 2 : Success
... Setup Modem OK
... modem init OK
Connect Modem ...
Using vpi.vci=8.35
using channel 3
Using interface ppp0
Connect: ppp0 <--> /dev/pts/4
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xbc32b6c6>]
rcvd [LCP ConfReq id=0x46 <mru 1500> <auth chap MD5> <magic 0xab61f90>]
sent [LCP ConfAck id=0x46 <mru 1500> <auth chap MD5> <magic 0xab61f90>]
rcvd [LCP ConfRej id=0x1 <asyncmap 0x0>]
sent [LCP ConfReq id=0x2 <magic 0xbc32b6c6>]
rcvd [LCP ConfAck id=0x2 <magic 0xbc32b6c6>]
rcvd [CHAP Challenge id=0x1 <be0d5ec2d5c53b658493eed1e0aa8955>, name = "BSLMA202"]
sent [CHAP Response id=0x1 <c2b2d49d25580f409872b682ca410549>, name = "fti/*******@fti"]
rcvd [CHAP Failure id=0x1 "Authentication Failed."]
Remote message: Authentication Failed.
CHAP authentication failed
sent [LCP TermReq id=0x3 "Failed to authenticate ourselves to peer"]
rcvd [LCP TermReq id=0x47]
sent [LCP TermAck id=0x47]
rcvd [LCP TermReq id=0xff]
sent [LCP TermAck id=0xff]
sent [LCP TermReq id=0x4 "Failed to authenticate ourselves to peer"]
rcvd [LCP TermReq id=0xff]
sent [LCP TermAck id=0xff]
Connection terminated.
Waiting for 1 child processes...
script /usr/local/bin/pppoeci -v 1 -vpi 8 -vci 35, pid 3414
Hangup (SIGHUP)
Waiting for 1 child processes...
script /usr/local/bin/pppoeci -v 1 -vpi 8 -vci 35, pid 3414
Child process /usr/local/bin/pppoeci -v 1 -vpi 8 -vci 35 (pid 3414) terminated with signal 1
Si vous y comprenez quelque chose et que vous pouvez m aider, alors merci pour vos reponses, j ai verifié le pass et le login et ils sont bons tous les deux ( ici volontairement cachés 
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