cisco 803 e telecom AIUTO!

[Noone]

Per circa due anni sono rimasto collegato con telecom businness al 7020191191,circa un mese fa la connessione ha smesso di funzionare e dopo estenuanti telefonate con i tecnici ho capito che al loro pop risulta assegnato al mio router un ip ma il router scrive che l'ip address will be negotiated with tcmp o qualcosa del genere...
Provando e riprovando ho scoperto che se tolgo dalle interfaccie Bri0 e Dialer1 la stringa ppp multilink tutto torna a funzionare perfettamente tranne che vado a 128 in upload ma solo a 64 in download.
posto di seguito la conf:
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Noone
!
boot system flash c800121.bin
logging buffered 8192 debugging
no logging console
enable secret 5 $1$aBFt$gyMj4Zt9iRjS7lfROgrA70
!
username xxxx password xxxx
!
!
!
!
!
dial-peer voice 1 pots
no forward-to-unused-port
call-waiting
ring 0
port 1
destination-pattern 053xxxxxx
!
pots country IT
ip subnet-zero
no ip source-route
!
isdn switch-type basic-net3
!
!
!
interface Ethernet0
ip address 192.168.1.254 255.255.255.0
ip access-group 121 in
ip access-group 105 out
no ip proxy-arp
ip nat inside
!
interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
isdn incoming-voice modem
ppp authentication chap pap callin
ppp multilink
!
interface Dialer1
description ISP
ip address negotiated
ip access-group 121 in
no ip proxy-arp
ip nat outside
encapsulation ppp
no ip split-horizon
dialer pool 1
dialer remote-name Cisco1
dialer idle-timeout 300
dialer string 7020191191 class DialClass
dialer hold-queue 10
dialer load-threshold 10 either
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname telecom
ppp chap password 7 083549420C1A0A1A
ppp pap sent-username telecom password 7 111D1C0912110401
ppp multilink
!
ip nat translation timeout 3600
ip nat translation tcp-timeout 3600
ip nat translation udp-timeout 1200
ip nat translation finrst-timeout 300
ip nat translation syn-timeout 120
ip nat translation dns-timeout 300
ip nat translation icmp-timeout 120
ip nat translation max-entries 4096
ip nat inside source list 18 interface Dialer1 overload
ip nat inside source static udp 192.168.1.10 20 interface Dialer1 20
ip nat inside source static udp 192.168.1.10 21 interface Dialer1 21
ip nat inside source static tcp 192.168.1.10 21 interface Dialer1 21
ip nat inside source static tcp 192.168.1.10 20 interface Dialer1 20
ip nat inside source static tcp 192.168.1.10 443 interface Dialer1 443
ip nat inside source static tcp 192.168.1.10 80 interface Dialer1 80
ip nat inside source static tcp 192.168.1.10 4712 interface Dialer1 4712
ip nat inside source static tcp 192.168.1.10 4711 interface Dialer1 4711
ip nat inside source static tcp 192.168.1.10 4662 interface Dialer1 4662
ip nat inside source static tcp 192.168.1.10 4665 interface Dialer1 4665
ip nat inside source static udp 192.168.1.10 4665 interface Dialer1 4665
ip nat inside source static udp 192.168.1.10 4672 interface Dialer1 4672
ip nat inside source static tcp 192.168.1.10 5902 interface Dialer1 5902
ip nat inside source static udp 192.168.1.10 123 interface Dialer1 123
no ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
!
!
map-class dialer DialClass
access-list 18 permit 192.168.1.0 0.0.0.255
access-list 105 permit tcp any any eq 5902
access-list 105 permit tcp any 192.168.1.0 0.0.0.255 established
access-list 105 permit udp host 151.99.125.2 eq domain 192.168.1.0 0.0.0.255
access-list 105 permit udp host 151.99.125.3 eq domain 192.168.1.0 0.0.0.255
access-list 105 permit tcp any host 192.168.1.10 eq www
access-list 105 permit tcp any host 192.168.1.10 eq ftp
access-list 105 permit tcp any host 192.168.1.10 eq ftp-data
access-list 105 permit tcp any any eq 4662
access-list 105 permit tcp any any eq 4665
access-list 105 permit udp any any eq 4672
access-list 105 permit udp any any eq 4665
access-list 105 permit tcp any any eq 4711
access-list 105 permit icmp any any echo-reply
access-list 105 permit tcp any any eq 443
access-list 105 permit udp any any eq ntp
access-list 105 permit udp any host 192.168.1.10 eq 20
access-list 105 permit udp host 208.67.222.222 eq domain 192.168.1.0 0.0.0.255
access-list 105 permit udp host 208.67.220.220 eq domain 192.168.1.0 0.0.0.255
access-list 121 deny udp any eq netbios-dgm any
access-list 121 deny udp any eq netbios-ns any
access-list 121 deny udp any eq netbios-ss any
access-list 121 deny tcp any eq 137 any
access-list 121 deny tcp any eq 138 any
access-list 121 deny tcp any eq 139 any
access-list 121 permit ip any any time-range TIME
dialer-list 1 protocol ip permit
!
line con 0
exec-timeout 120 0
stopbits 1
line vty 0 4
exec-timeout 0 0
login local
!
time-range TIME
periodic daily 0:00 to 23:59
!
end


Non so davvero come fare... può essere che in un qualche modo l'immagine ios si sia corrotta o che alla telecom abbiano fatto qualche aggiornamento che ha reso la mia ios incompatibile?
è tentativo azzeccato cambiare ios?
Ringrazio chiunque abbia idee