sh run 
Building configuration... 

Current configuration : 3245 bytes 
! 
version 12.4 
no service pad 
service timestamps debug uptime 
service timestamps log uptime 
service password-encryption 
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hostname XXXX 
! 
boot-start-marker 
boot-end-marker 
! 
enable secret 
! 
no aaa new-model 
! 
resource policy 
! 
! 
! 
ip cef 
! 
! 
! 
! 
class-map match-any SIP-calls 
 match access-group 102 
 match access-group 103 
! 
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policy-map VoIP 
 class SIP-calls 
  priority 128 
 class class-default 
  fair-queue 
! 
! 
! 
! 
! 
interface Loopback0 
 description Loopback di NAT 
 ip address 6x.xxx.xxx.xxx 255.xxx.xxx.xxx 
! 
interface Ethernet0 
 ip address 192.168.0.253 255.255.255.0 
 ip nat inside 
 no ip virtual-reassembly 
 hold-queue 100 out 
! 
interface Ethernet2 
 no ip address 
 shutdown 
 hold-queue 100 out 
! 
interface ATM0 
 no ip address 
 no atm auto-configuration 
 no atm ilmi-keepalive 
 no atm address-registration 
 no atm ilmi-enable 
 dsl operating-mode auto 
 hold-queue 224 in 
! 
interface ATM0.35 point-to-point 
 ip address 2xx.xxx.xxx.xxx 255.xxx.xxx.xxx 
 ip nat outside 
 no ip virtual-reassembly 
 no snmp trap link-status 
 pvc 8/35 
  vbr-nrt 800 256 
  oam-pvc manage 
  encapsulation aal5snap 
  service-policy output VoIP 
 ! 
! 
interface FastEthernet1 
 duplex auto 
 speed auto 
! 
interface FastEthernet2 
 duplex auto 
 speed auto 
! 
interface FastEthernet3 
 duplex auto 
 speed auto 
! 
interface FastEthernet4 
 duplex auto 
 speed auto 
! 
ip route 0.0.0.0 0.0.0.0 ATM0.35 
no ip http server 
no ip http secure-server 
! 
no ip nat service sip tcp port 5060 
no ip nat service sip udp port 5060 
ip nat inside source list 101 interface Loopback0 overload 
! 
access-list 101 permit ip 192.168.0.0 0.0.0.255 any 
access-list 102 permit udp any any eq 5060 
access-list 103 permit udp any range 60000 65000 <ip Proxy-SIP> 
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control-plane 
! 
! 
line con 0 
 password 
 login 
 no modem enable 
line aux 0 
 password 
 login 
line vty 0 4 
 password 
 login 
! 
scheduler max-task-time 5000