[Freeswitch-users] Can't get fax working

Boris Kovalenko boris at tagnet.ru
Thu Jul 21 17:01:17 MSD 2011


Hello!

     May be a little detailed description of problem. Network configuration
NC1: Kapanga Softphone -- FS -- Audiocodes MP-114 - FAX
NC2: Kapanga Softphone -- FS -- Cisco 5350 - PSTN - FAX

With NC1 I call to fax. If I will wait for Kapanga automaticaly detects 
T38 mode, the fax is _always_ success. If I force Kapanga to start T38 
(by pressing fax key), the fax mostly fails.

With NC2 no matter will or not I press fax key. The fax is always success.
Hope this may help.

> 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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