Исправил результат тот же.
sip.conf
[zadarma]
type=friend
usernanme=08673
secret=xxxxxxx
host=sip.zadarma.com
nat=no
context=incomig_calls
dtmfmod=info
canreinvite=no
insecure=invite
callerid=SipPhone
fromuser=08673
fromdomain=sip.zadarma.com
language=ruextensions.conf
exten => _+7xxxxxxxxxx,1,Set(CALLERID(all)="08673" <SipPhone>)
exten => _+7xxxxxxxxxx,n,Dial(SIP/zadarma/${EXTEN:1},120)
exten => _+7xxxxxxxxxx,n,Hangup()
[Jun 26 11:43:18] NOTICE[2654]: chan_sip.c:13056 handle_response_invite: Failed to authenticate on INVITE to '"08673" <sip:08673@sip.zadarma.com>;tag=as7a1cbdd6