[Freeswitch-users] Limit maximum number of outgoing calls of a sip user

How can I limit the number of outgoing sip calls for a sip user. I'm using the following configuration: <include> <user id="1000"> <params> <param name="password" value="1234"/> <param name="vm-password" value="0000"/> </params> <variables> <variable name="max_calls" value="2"/> </variables> </user> </include> However the variable max_calls is set to 2, I can do 5 outbound calls from a registered sip client. Is this parameter only for inbound calls? Is there another parameter for outbound calls? Thanks Markus