[Freeswitch-users] T.38/spandsp_fax interop problem

[Marcin Gozdalik]

2012/5/16 Marcin Gozdalik <gozdal at gmail.com>

> I'm trying to send fax from FreeSWITCH to PSTN using T.38. FS is connected
> to Broadsoft softswitch. The softswitch is connected to PSTN using
> SIP-trunk to external provider. Apparently there is no T.38 on Broadsoft
> and it is provided by the external provider (i.e. Broadsoft provides only
> T.38 pass-through).
>


> [snip]
>

For anybody struggling with the same problem: it turned out to be loopback
problem. It is possible to transmit a fax through loopback using txfax when
the other side is issuing reINVITE. It is however not possible to force FS
to issue reINVITE in txfax over loopback (using enable_t38_request).

Best regards

-- 
Marcin Gozdalik
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