Asterisk not give the right ring


#1

Hi,
i am new to asterisk and i have one problem.
I have cpnnect my asterisk to sipdiscount.
Normally when i call a mobile phone in my country and it is closed i hear a person who say that the recepient can receive a sms with my call when open the mobile.
But if i call with asterisk i hear only the normal ring.
How i can config the asterisk to give me all the messages of the phone company?
I have use debian rpm of asterisk and i have just add this in the config files:

sip.conf: ****************************
[sipdiscount]
type=peer
host=sip1.sipdiscount.com
dtmfmode=inband
disallow=all
allow=gsm
allow=ulaw
allow=alaw
allow=g726
canreinvite=no
fromdomain=stun.sipdiscount.com ; their stun server
username=*****
fromuser=*****
secret=*****

[user1]
type=friend
secret=*****
qualify=yes
nat=yes
host=dynamic
canreinvite=no
context=internal


voicemail.conf***********************
100 => 1234,my name,cmail@mymail.com,mail@mmail.com,tz=athens24|attach=yes


extensions*******************
[incoming]
exten => s,1,Dial(SIP/christos,30,r)
exten => s,2,VoiceMail(u100@default)
exten => s,102,VoiceMail(b100@default)
[internal]
exten => 100,1,Dial(SIP/christos,30,r)
exten => 100,2,VoiceMail(u100@default)
exten => 100,102,VoiceMail(b100@default)
exten => _7.,1,Dial(SIP/${EXTEN:1}@sipdiscount,30,tr)
exten => _7.,2,Congestion
exten => _7.,3,Busy
exten => 611,1,Echo( )
exten => 500,1,VoiceMailMain( )