[Freeswitch-users] need help on variable and param

[false]

Hi all

i am confuse the param and variable in freeswitch, sometimes param is used for gateway, sometime variable is used for users
example:
<param>
<param name="dial-string" value="{presence_id=${dialed_user}@${dialed_domain}}${sofia_contact(${dialed_user}@${dialed_domain})}"/>
</param>

=============


<variables>
      <variable name="record_stereo" value="true"/>
      <variable name="default_gateway" value="$${default_provider}"/>
      <variable name="default_areacode" value="$${default_areacode}"/>
      <variable name="transfer_fallback_extension" value="operator"/>
      <variable name="user_context" value="company-b.org"/>
</variables>

what is difference between param and variable
how to use param and variable
is there a list of variable and param

Thank you


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