[asterisk-users] 1.6, t.38 and zoiper - t38_udptl or t38pt_udptl ?

Olivier oza-4h07 at myamail.com
Fri Dec 5 10:25:24 CST 2008


2008/12/5 Stefan Lekov <arcopix at erihon.com>

> Olivier wrote:
>
>>
>>
>> 2008/12/3 Olivier <oza-4h07 at myamail.com <mailto:oza-4h07 at myamail.com>>
>>
>>
>>
>>    2008/12/3 Steve Underwood <steveu at coppice.org
>>    <mailto:steveu at coppice.org>>
>>
>>        Hi,
>>
>>        I would be interested in any reports of anyone getting a T.38
>>        FAX to
>>        send or receive successfully with Zoiper. I've tried to test
>>        my T.38
>>        implementation against more than one revision of Zoiper, and I
>>        yet to
>>        see it behave sanely.
>>
>>
>>    I could receive yesterday from Zoiper 2.18 Windows free edition
>>    with ReceiveFAX installed with latest Asterisk 1.6.X.
>>    Would you like more details ?
>>
>>
>> To be more precise, I only tried once and I wouldn't swear T.38 mode was
>> used (I've checked) : maybe ReceiveFax would allow G711 inbound faxes.
>>
>>
>>
>>
>>        Steve
>>
>>
>>        Olivier wrote:
>>        >
>>        >
>>        > 2008/12/3 regs at kinetix.gr <mailto:regs at kinetix.gr>
>>        <mailto:regs at kinetix.gr <mailto:regs at kinetix.gr>>
>>        <regs at kinetix.gr <mailto:regs at kinetix.gr>
>>        > <mailto:regs at kinetix.gr <mailto:regs at kinetix.gr>>>
>>        >
>>        >     I tried sending faxes through Zoiper (Zoiper to Zoiper)
>>        last week
>>        >     and the program crashed. After an update it stopped
>>        crashing but
>>        >     still could not send a FAX. I then tried Kapanga (the
>>        free version
>>        >     has a limited 30
>>        >     days FAX sending capability) and it worked. This might be of
>>        >     little use
>>        >
>>        >
>>        > No it has much value to me.
>>        >
>>        > I was already suspicious about Zoiper as I could send fax
>>        between
>>        > other endpoints.
>>        >
>>        > Originally, I thought using the same software on both could
>>        help to
>>        > validate other settings (tuning of sip.conf) but to my
>>        surprise I
>>        > couldn't find much about Zoiper fax capabilities.
>>        > I have the rough feeling Zoiper can't receive fax at the
>>        moment or
>>        > either, tuning Asterisk to allow that is not simple.
>>        > For sending, I won't rate it at the moment.
>>        >
>>        >
>>        >
>>        >     to you
>>        >     since I used Freeswitch with t38 pass-trhough, but my
>>        point is :
>>        >     first find a client
>>        >     that supports t38 FAX capabilites that work and then try
>>        asterisk.
>>        >     Our company had success
>>        >     sending FAX using t38 through asterisk along time ago so
>>        I guess
>>        >     you will get there sooner or later.
>>        >
>>        >     Olivier wrote:
>>        >>     Hi,
>>        >>
>>        >>     1. Has anyone got any success when send a TIFF file
>>        form one
>>        >>     zoiper softphone to another ?
>>        >>     I tried using Zoiper 2.18 free edition in windows but
>>        I'm seeing
>>        >>     415 Unsupported media replies.
>>        >>
>>        >>     2. Here
>>        (http://www.voipinfo.org/wiki/view/Asterisk+T.38), you
>>        >>     can read :
>>        >>     "Also, try using:
>>        >>
>>        >>      t38_udptl=yes
>>        >>      t38pt_rtp=no
>>        >>      t38pt_tcp=no
>>        >>
>>        >>     ... in the general section of the sip.conf and under
>>        the VoIP
>>        >>     provider account as well as the fax account. "
>>        >>
>>        >>     But above, you can read
>>        >>     "[general]
>>        >>     t38pt_udptl = yes "
>>        >>
>>        >>     Has this parameter name changed between 1.4 to 1.6 from
>>        t38_udptl
>>        >>     to t38pt_udptl ?
>>        >>     A asterisk remains silent when I add an unknown parameter
>>        >>     "foo=bar", it would perfect if someone could point the
>>        right name
>>        >>     (t38_udptl or t38pt_udptl).
>>        >>
>>        >>     Regards
>>        >
>>
>>
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>>
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> The option is t38pt_udptl = yes, and has to be set in both the global part
> and in the peer. The option was t38pt_udptl in 1.4 and I don't think it got
> changed in 1.6.
> Also, you can open a ticket with us (zoiper support) on support at zoiper.com<mailto:
> support at zoiper.com>, and if you provide us with some packet captures, we
> should be able to diagnose the issue


As I used Free edition, I didn't dare to open tickets.
I'll try to open one with appropriate setting within the next few days.

Regards

>
>
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