freeswitch/conf/vars.xml

  <!-- Preprocessor Variables
       These are introduced when configuration strings must be consistent across modules. 
   -->
  <X-PRE-PROCESS cmd="set" data="domain=$${local_ip_v4}"/>
  <!-- sip_profile 
       Must be a domain name if you are being a registry server; otherwise
       can be any string.
       used by: sofia.conf.xml enum.conf.xml default_context.xml directory.xml
  --> 
  <X-PRE-PROCESS cmd="set" data="sip_profile=$${domain}"/>
  <X-PRE-PROCESS cmd="set" data="nat_sip_profile=nat_$${domain}"/>
  <!-- xmpp_client_profile and xmpp_server_profile
       xmpp_client_profile can be any string. 
       xmpp_server_profile is appended to "dingaling_" to form the database name
       containing the "subscriptions" table.
       used by: dingaling.conf.xml enum.conf.xml 
  --> 
  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G722,PCMU@20i,PCMA@20i"/>
  <X-PRE-PROCESS cmd="set" data="xmpp_client_profile=xmppc"/>
  <X-PRE-PROCESS cmd="set" data="xmpp_server_profile=xmpps"/>
  <!-- bind_server_ip
       Can be an ip address, a dns name, or "auto". 
       This determines an ip address available on this host to bind.
       If you are separating RTP and SIP traffic, you will want to have
       use different addresses where this variable appears.
       Used by: sofia.conf.xml dingaling.conf.xml
  -->
  <X-PRE-PROCESS cmd="set" data="bind_server_ip=auto"/>
  <!-- external_rtp_ip
       Used as the public IP address for SDP.
       Can be an ip address or a string like "stun:stun.server.com" 
       If unspecified, the bind_server_ip value is used.
       Used by: sofia.conf.xml dingaling.conf.xml
  -->
  <X-PRE-PROCESS cmd="set" data="external_rtp_ip=stun:stun.fwdnet.net"/>
  <!-- external_sip_ip
       Used as the public IP address for SDP.
       Can be an ip address or a string like "stun:stun.server.com" 
       If unspecified, the bind_server_ip value is used.
       Used by: sofia.conf.xml dingaling.conf.xml
  -->
  <X-PRE-PROCESS cmd="set" data="external_sip_ip=stun:stun.fwdnet.net"/>
  <!-- server_name
       A public ip address or DNS name that is used when advertising conference
       presence or registering sip.
       Used by: conference.conf.xml
  --> 
  <!-- outbound_caller_id and outbound_caller_name
       The caller ID telephone number we should use when calling out.
       Used by: conference.conf.xml
  -->
  <X-PRE-PROCESS cmd="set" data="outbound_caller_name=FreeSWITCH"/>
  <X-PRE-PROCESS cmd="set" data="outbound_caller_id=8777423583"/>