dial-peer voice 123 voip
        description Route to Asterisk server
        destination-pattern 72..
        session protocol sipv2
        session target ipv4:10.0.0.13:5070
        session transport udp
        dtmf-relay rtp-nte
        codec gsm
        no vad
sip-ua
        retry invite 3
        retry response 3
        retry bye 3
        retry cancel 3
        timers trying 1000
        sip-server ipv4:10.0.0.13