[Freeswitch-users] T.38_gateway & switch_core_media_bug : increase "timeout"

[Weera Suriya]

Hello list,
I able to send & receive faxes via SS7 link. but I have a small problem with
"switch_core_media_bug". I noticed "Media bug" activate for first 10 seconds
to 20 seconds against SIP channels.
most of our customers use Tele/FAX option on Fax machines. that means ; they
answer the call manually (as a voice call) If there was a fax then they
activate Fax mode. the problem is FS can't detect CNG tones after 20
seconds, because "switch_core_media_bug" was removed from the particular
channels. If the destination fax machine can generate  CNG tones within 10 ~
20 seconds Then FS can detect CNG tones and change in to T.38 mode.

is there any way to increase the window of time (switch_core_media_bug)  to
listen for the CNG tones on SIP channels?

This is my dialplan for G711(from PSTN/SS7 via SIP) to T.38(to SIP ATAs)
------>8--------
    <extension name="g711_to_t.38">
      <condition field="destination_number" expression="^1(0\d{8})$">
<action application="pre_answer"/>
<action application="set" data="ringback=%(1000, 4000, 400.0, 400.0)"/>
<action application="t38_gateway" data="peer"/>
<action application="bridge" data="sofia/external/$1 at 192.168.11.53"/>
<action application="hangup"/>
      </condition>
    </extension>

This is my dialplan for T.38(from SIP ATAs) to G711(to PSTN/SS7 via SIP)
------>8--------
    <extension name="t.38_to_g711">
      <condition field="destination_number" expression="^(0\d+)$">
<action application="ring_ready" />
<action application="set" data="ringback=%(1000, 4000, 400.0, 400.0)"/>
<action application="start_dtmf_generate" data="true"/>
<action application="t38_gateway" data="self"/>
<action application="bridge" data="sofia/external/$1 at 192.168.11.54:5070"/>
<action application="hangup"/>
      </condition>
    </extension>
------>8--------

Thank you.

Weera Suriya
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