[asterisk-users] outbound fax over t38 gateway can't pass

[Dmitry Melekhov]

btw, played with res_fax.conf
if I set maxrate=7200 fax machines try (and fail) 9600 anyway.
Why? If limited ti 7200? looks like bug...

So I set maxrate=4800 and modems=v27.
Faxes pass....

Looks like problems with V29...



29.02.2012 07:56, Dmitry Melekhov пишет:
> Hello!
>
> I have problems with outbound faxes with asterisk 10.2 t38 gateway.
>
> There is asterisk box, connected to panasonic kx-td500 over PRI link 
> with TE122.
>
> If we try to send fax with following path:
>
> panasonic 500 extension fax machine panasonic500-> asterisk-> ooh323-> 
> cisco 3845-> fax machine
>
> fax can't pass. always reproducable.
>
> as I see in tcpdump produced dump fax machines tries to connect on 
> 9600 and failed, no attempt to down speed.
>
> If I send fax in path
> panasonic 500 extension fax machine -> asterisk (ReceiveFAX) it is 
> received successefully all the time.
>
> If I send fax from asterisk with SendFax as following:
>
> asterisk(SendFax) -> panasonic500->asterisk-> ooh323-> cisco 3845...-> 
> fax machine
> it always passes.
> Usually on 7200, sometimes on 4800.
>
> So ooh323 works OK, fax part works OK, t38 works OK, but not with fax 
> machine (we tested to different).
>
> Inbound faxes in reverse direction, i.e.
> fax machine...cisco3845-> ooh323 -> asterisk -> panasonic -> fax machine
> always pass on 7200.
>
>
> More info is here https://issues.asterisk.org/jira/browse/ASTERISK-19436
>
> Bug report was closed because not a bug :-)
>
> Could you help me solve this problem?
>
> Thank you!
>

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