Hello!
Hello Boris,
 
  It seems like your Audiocodes is misconfigured. I had a different problem which might be (or not) related to your problem: Both FS and Audiocodes asked for T.38 and it didn't work.
 
Do you have T38 enabled in FreeSwitch? If so, try the following at your MP:
I think I have. This is my configuration:
<configuration name="fax.conf" description="FAX application configuration">
    <settings>
        <param name="use-ecm"                   value="false"/>
        <param name="verbose"                   value="true"/>
        <param name="disable-v17"               value="false"/>
        <param name="ident"                     value="SpanDSP Fax Ident"/>
        <param name="header"                    value="SpanDSP Fax Header"/>
        <param name="spool-dir"                 value="/tmp"/>
        <param name="file-prefix"               value="faxrx"/>
        <param name="enable-t38"                value="true"/>
        <param name="enable-t38-request"        value="false"/>
    </settings>
</configuration>

Also I have <param name="t38-passthru" value="true"/> in every sip profile. Also
   <!-- <param name="inbound-bypass-media" value="true"/> -->
    <!-- <param name="inbound-proxy-media" value="true"/> -->
parameters are commented. Is this right and enought configuration for T38?

- At the Fax/Modem screen disable all fax and modems protocols.
- At all other screens set the fax protocol to be T.38
- Add the T.38 codec.
Tried with no success.
 
I hope this helps.
 
                           __Yehavi: 


2011/7/19 Boris Kovalenko <boris@tagnet.ru>
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