BRI Misdn: Caller id is wrong

When i dial out the number displayed on the callers phone is wrong:

Card: Digium BRI 480
ISDN PROV: Fastweb Italy

Real Number :+390236642220
Outgoing number: displayed: +35343390236642220

Misdn international prefix is set to 0 and 00

vcitamil001*CLI> dial 800353879482514

[Apr 4 17:33:32] WARNING[9426]: chan_oss.c:695 setformat: Unable to set format to 16-bit signed

-- Executing [800353879482514@default:1] Dial("OSS/dsp", "misdn/g:intern/00353879482514") in new stack

P[ 1] read_config: Getting Config

P[ 1] * CALL: g:intern/00353879482514

P[ 1] I SEND:SETUP oad: dad:00353879482514 pid:30

-- Called g:intern/00353879482514

P[ 1] I IND :NEW_L3ID oad: dad:00353879482514 pid:30 state:CALLING

P[ 1] We already have a channel (2)

P[ 1] I IND :SETUP_ACKNOWLEDGE oad: dad:00353879482514 pid:30 state:CALLING

P[ 1] I IND :PROCEEDING oad: dad:00353879482514 pid:30 state:CALLING_ACKNOWLEDGE

-- mISDN/2-u87 is proceeding passing it to OSS/dsp

[Apr 4 17:33:37] WARNING[9448]: chan_oss.c:978 oss_indicate: Don't know how to display condition 15 on OSS/dsp

P[ 1] I IND :ALERTING oad: dad:00353879482514 pid:30 state:PROCEEDING

P[ 1] Starting Tones, we have inband Data

-- mISDN/2-u88 is ringing

[Apr 4 17:33:48] DEBUG[9369]: chan_misdn.c:2440 misdn_hangup: misdn_hangup(mISDN/1-u72)

P[ 1] * IND : HANGUP pid:25 ctx:misdn dad: oad:83473561058 State:CONNECTED

P[ 1] I SEND:DISCONNECT oad:4231 dad:3473561058 pid:25

== Spawn extension (default, 83473561058, 1) exited non-zero on 'SIP/4231-b670e958'

P[ 1] I IND :RELEASE oad: dad: pid:25 state:CLEANING

P[ 1] Cannot hangup chan, no ast

vcitamil001*CLI> hangup

[Apr 4 17:33:54] DEBUG[9448]: chan_misdn.c:2440 misdn_hangup: misdn_hangup(mISDN/2-u88)

P[ 1] * IND : HANGUP pid:30 ctx:misdn dad:00353879482514 oad:800353879482514 State:ALERTING

P[ 1] I SEND:DISCONNECT oad: dad:00353879482514 pid:30

== Spawn extension (default, 800353879482514, 1) exited non-zero on 'OSS/dsp'

<< Hangup on console >>

P[ 1] CC_RELEASE|CONFIRM (l3id:8016ff00), sending RELEASE_COMPLETE

P[ 1] I SEND:RELEASE_COMPLETE oad: dad:00353879482514 pid:30

P[ 1] I IND :RELEASE oad: dad: pid:30 state:CLEANING

P[ 1] Cannot hangup chan, no ast

The server specific dialplan:

;Outbound calls
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;exten => _8.,1,misdn_check_l2l1(g:intern|2)
exten => _8.,1,Dial(misdn/g:intern/${EXTEN:1})