[Freeswitch-users] Can't get fax working

[Yehavi Bourvine]

Hello Boris,

  That's exactly the problem I had with my MP-124. If you send me its
configuration file I will look on it next week and compare it to mine.
It is related to T.38 re-invite.

                              __Yehavi:


2011/7/21 Boris Kovalenko <boris at tagnet.ru>

>  Hello!
>
>
>     I collected tcpdump between Freeswitch and Audiocodes MP-114 and found
> something strange. The sequence of packets is:
> FS  INVITE with SDP
> MP 100 Trying
> MP 180 Ringing
> MP 200 OK with SDP
> FS/MP RTP/RTP
> MP ReINVITE with SDP
> FS 100 Trying
> ---- long pause and call disconnected
> MP BYE
> FS 200 OK with SDP !!!!! CSeq: INVITE !!!!!
> FS 200 OK CSeq BYE
> FS 200 OK with SDP !!!!! CSeq: INVITE !!!!!
> FS 200 OK with SDP !!!!! CSeq: INVITE !!!!!
> FS 200 OK with SDP !!!!! CSeq: INVITE !!!!!
>
> Thinking this is a problem of T.38 operation. Sometimes, IMHO, Freeswitch
> is buffering??? 200 OK response and session can not be established. Where
> may I place dump for gurus may look at it?
>
>  Hello!
>
>     I need help with fax configuration. My network is:
>
> PSTN E1 --- Cisco AS5350 -- Freeswitch -- Audiocodes MP-114 -- Fax
>
> FS version: FreeSWITCH Version 1.0.head (git-062f07f 2011-07-16 12-35-25
> +0200)
> Audiocodes firmware: 6.00A.038.004
> I can't get faxes working :( In FS profiles there is a parameter <param
> name="t38-passthru" value="true"/>
> Cisco DP fax settings:
> fax-relay ecm disable
>  fax rate 9600
>  fax protocol t38 ls-redundancy 2 hs-redundancy 1 fallback pass-through
> g711alaw
>  no vad
>
> On Audiocodes there is also T38 enabled (as I think) but there is no T38.
> There are messages on MP-114:
> ErrMgs=16 T38Decoder received Non-T38 Packet
> and
>
> Modem Relay Is Not Supported! Forcing Bypass Mode
>
>
> Please, help! What information I need to collect to help solve the problem?
>
> --
> Regards,
> Boris
>
>
>
>
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>
>
> --
> Regards,
> Boris
>
>
>
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