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

[Anthony Minessale]

t38_gateway_detect_timeout var

On Wed, Jul 28, 2010 at 11:12 AM, Weera Suriya <weerasuri at gmail.com> wrote:

> 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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>


-- 
Anthony Minessale II

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