[Freeswitch-users] incoming fax calls

[Madovsky]

I'm trying to find a way to dectect a fax or call from the same extension

        <extension name="myphone">
                <condition field="${sip_to_uri}" expression="^(9999)@$${domain}$">
                        <action inline="true" application="export" data="dialed_extension=$1"/>
                        <action application="set" data="session_in_hangup_hook=true"/>
                        <action application="set" data="hangup_after_bridge=true"/>
                        <action application="set" data="continue_on_fail=NORMAL_TEMPORARY_FAILURE,CALL_REJECTED,NORMAL_CLEARING,USER_NOT_REGISTERED,NO_ANSWER,NO_USER_RESPONSE,USER_BUSY"/>
                        <action application="set" data="group_confirm_cancel_timeout=1"/>
                        <action application="ring_ready"/>
                        <action application="set" data="execute_on_media=tone_detect fax 1100 r +5000 transfer 'receivefax XML features' 1"/>
                        <action application="export" data="originate_timeout=25"/>
                        <action application="bridge" data="{sip_invite_domain=${sip_from_host},nibble_account=,nibble_rate=,origination_caller_id_name=${caller_id_name},origination_caller_id_number=${caller_id_number,}}user/${dialed_extension}"/>
                </condition>
         </extension>

is there a way to detect a fax before answer (2 rings for example) and avoid 
phone rings until no answer ?

thanks
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