Asterisk provider configuration problem

hi,
im new in asterisk and i know the basics thinks in linux,i have a problem im trying to configure my VOIP provider in asterisk to dial to external lines ,in local extension i didnt have problem i can used this service perfect…

#vi /etc/asterisk/sip.conf

[general]
context=default
localnet = 172.16.75.0/255.255.255.0
srvlookup=yes
disallow=all ; Desactivar todos los codificadores
allow=alaw ; Permitir codificadores en orden de preferencia
allow=ilbc
allow=gsm
allow=h261

; Realizar registro en ETAPA con un usuario y clave de acceso validos y
; encaminar las llamadas hacia la extension 101
register => 59347041985:xxxx@10.130.x.x/101

; Hacer acceder a Asterisk hacia una cuenta en ETAPA para permitir
; realizar llamadas
[Etapa]
type=friend
username=59347041985
secret=xxxx
host=10.130.x.x
fromuser=59347041985
canreinvite=no

; Extension 101
[101]
type=friend
secret=101
qualify=yes
nat=no
host=dynamic
canreinvite=no
context=home

; Extension 102
[102]
type=friend
secret=102
qualify=yes
nat=no
host=dynamic
canreinvite=no
context=home

; Extension 103
[103]
type=friend
secret=secreto3
qualify=yes
nat=no
host=dynamic
canreinvite=no
context=home

==========================================

[default]
include => ext-local
exten => s,1,Playback(vm-goodbye)
exten => s,2,Macro(hangupcall)
; Macro que habilita el uso de correo de voz, de modo que no haráalta
; repetir complejas configuraciones en cada cuenta.
[macro-correovoz]
exten => s,1,Dial(${ARG1},20)
exten => s,2,Goto(s-$DIALSTATUS},1)
exten => s-NOANSWER,1,Voicemail(u${MACRO_EXTEN})
exten => s-NOANSWER,2,Hangup()
exten => s-BUSY,1,Voicemail(b${MACRO_EXTEN})
exten => s-BUSY,2,Hangup()
exten => _s-.,1,Goto(s-NOANSWER,1)

[home]
; Extension 101
exten => 101,1,Macro(correovoz,SIP/101)

; Extension 102
exten => 102,1,Macro(correovoz,SIP/102)

; Extension 103
exten => 103,1,Macro(correovoz,SIP/103)

; Prueba de Eco
exten => 600,1,Answer()
exten => 600,2,Playback(demo-echotest)
exten => 600,3,Echo()
exten => 600,4,Playback(demo-echodone)
exten => 600,5,Hangup()

; Lo siguiente permite realizar llamadas hacia cuentas externas mediante Etapa
; solo antecediendo un nú 9 antes de la cuenta.
;exten => _9.,1,Dial(SIP/Etapa/${EXTEN:1}@10.130.x.x,20,r))

=========================================
#/etc/asterisk/manager.conf
;
; Asterisk Call Management support
;
[general]
enabled = yes
port = 5038
bindaddr = 0.0.0.0

[admin]
secret = elastix456
deny=0.0.0.0/0.0.0.0
permit=0.0.0.0/0.0.0.0
read = system,call,log,verbose,command,agent,user
write = system,call,log,verbose,command,agent,user

#include manager_additional.conf
#include manager_custom.conf

Status en el CLI.

sip show peers
Name/username Host Dyn Nat ACL Port Status
103/103 172.16.75.148 D 5060 OK (9 ms)
102 (Unspecified) D 0 UNKNOWN
101/101 172.16.75.29 D 62228 OK (101 ms)
Etapa/59347041985 10.130.x.x 5060 Unmonitored
4 sip peers [Monitored: 2 online, 1 offline Unmonitored: 1 online, 0 offline]

sip show registry

Host Username Refresh State Reg.Time
10.130.x.x:5060 59347041985 120 Request Sent

thank, and sorry about my english…