[Freeswitch-users] Problems with FAX transmission
riedinger at sns.eu
Fri Sep 17 09:50:52 PDT 2010
Hello All Together,
I tried to set t38_passthru=true in the dialplan, but fax transmission
is still not working. Now INVITE SDP (t38) is passed through, but e. g.
the response 200 OK SDP (t38) is not passed.
Just one hint, if you compare "Fax trace2.tif" with the trace of my last
e-mail: I'm not sure, if I made both traces with exactly the same setup,
because I tested with various carriers, but I observe similiar behaviour
with all of them.
Another hint was to set <action application="set"
data="proxy_media=true"/>. In the Wiki I found "Proxy media is really a
special hack that should only be used for T.38 passthrough. If you are
using it for other purposes, think about it some more...". Do you think
it is reasonable to use this setting for a common purpose wholesale switch?
Thank you in advance
Am 17.09.2010 15:56, schrieb Brian West:
> You need to setup t38_passthru=true, I'm currently working on an issue where it seems to not be forwarding the invite properly.
> On Sep 17, 2010, at 10:21 AM, Meftah Tayeb wrote:
>> <action application="set" data="bypass_media=true"/> if you are in lan,
>> or<action application="set" data="proxy_media=true"/> to proxy the
>> media from A-Leg to B-Leg
>> Jan Riedinger a écrit :
>>> I'm trying to send a fax via our Freeswitch switch without success.
>>> It seems that the "invite sdp (t38)" message isn't forwarded from the
>>> gateway of the fax receiver to the gateway of the fax sender. See the
>>> attached tif file with the Wireshark trace.
>>> If I try the fax transmission with the same setup with a commercial
>>> softswitch (same fax equipment, same sending and receiving gateways),
>>> the fax transmission is successful.
>>> We are using the following settings in the sip_profile
>>> <param name="inbound-codec-negotiation" value="greedy"/>
>>> <param name="inbound-late-negotiation" value="false"/>
>>> Does anybody know what's going wrong?
>>> Thank you in advance
>>> Jan Riedinger
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> FreeSWITCH-users at lists.freeswitch.org
Jan Riedinger Phone : +49-30-39 73 19 66
Dipl.-Inf. | Managing Director Fax : +49-30-39 73 19 64
E-Mail: riedinger at sns.eu
SNS Consult GmbH ICQ : 163-237-041
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