Использование каналов 2х asterisk

n extensions.conf: (on slave)

[outbound]
switch => IAX2/master:secret@iax-gw1.company.net/outbound

In iax.conf (on master):

[slave]
type=user
auth=plaintext
context=outbound
context=outbound2 ; (can have multiple if you want)
secret=secret
host=dynamic
callerid="slave"
trunk=yes
notransfer=yes

[slave]
type=peer
auth=plaintext
context=outbound-nuphone
secret=secret
host=dynamic
trunk=yes
notransfer=yes

In extensions.conf (slave):

[assigned-dids]
; uncomment a dial mechanism, first one goes to specific extension
; other one goes to dial parameter s.

;exten => 7046446999,1,Dial,IAX2/master@slave/${EXTEN}
;exten => 7046446999,1,Dial,IAX2/master@slave

In iax.conf (slave):

register => slave:secret@iax-gw1.company.net

[master]
type=peer
host=iax-gw1.company.net
secret=secret
context=outbound
trunk=yes
canreinvite=no

[master]
type=user
secret=secret
context=acontext
trunk=yes
canreinvite=no