it is freeswitch.conf
 <X-PRE-PROCESS cmd="set" data="sound_prefix=$${sounds_dir}/en/us/callie"/>
<X-PRE-PROCESS cmd="set" data="default_country=US"/>
<X-PRE-PROCESS cmd="set" data="global_codec_prefs=G7221@32000h,G7221@16000h,G722,PCMU,PCMA,GSM"/>

 <profile name="freeswitch-sip">
          <gateways>
            <gateway name="asterisk-local">
              <param name="proxy" value="127.0.0.1:5060"/>
              <param name="retry-seconds" value="30"/>
              <param name="caller-id-in-from" value="true"/>
            </gateway>
          </gateways>
         
          <domains>
            <domain name="all" alias="true" parse="false"/>
          </domains>
         
          <settings>
            <param name="debug" value="1"/>
            <param name="sip-trace" value="no"/>
            <param name="log-auth-failures" value="false"/>
            <param name="forward-unsolicited-mwi-notify" value="false"/>
            <param name="context" value="asterisk"/>
            <param name="rfc2833-pt" value="101"/>
            <param name="sip-port" value="5050"/>
            <param name="dialplan" value="XML"/>
            <param name="dtmf-type" value="info"/>
            <param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>
            <param name="outbound-codec-prefs" value="$${global_codec_prefs}"/>
            <param name="use-rtp-timer" value="true"/>
            <param name="rtp-timer-name" value="soft"/>
            <param name="rtp-timeout-sec" value="300"/>
            <param name="rtp-hold-timeout-sec" value="1800"/>
            <param name="vad" value="none"/>
            <param name="rtp-ip" value="127.0.0.1"/>
            <param name="sip-ip" value="127.0.0.1"/>
            <param name="ext-rtp-ip" value="127.0.0.1"/>
            <param name="ext-sip-ip" value="127.0.0.1"/>
            <param name="inbound-codec-negotiation" value="generous"/>
            <param name="tls" value="false"/>
            <param name="nonce-ttl" value="60"/>
            <param name="auth-calls" value="false"/>
            <param name="auth-all-packets" value="false"/>
            <param name="challenge-realm" value="auto_from"/>
          </settings>