Raúl Alexis Betancor Santana wrote:
> There are standars thats define that, "how long..", "how much to wait...",
> etc, on traditional telephony they was T.30 and company, on VoIP world they
> are T.38.
>
> The problems are the same as on traditional telephony, lines with noise (at
> the PSTN side I mean), distorsions, delay, etc. There are a lot of problems
> to solve, not to mention FAX incompatibilies, compressions schemas, error
> corrections codes, etc.
> I have seen fax machines on traditional telephony that never talk together
> (Cannon and Oki ones for example)
>
> So if you have a problem with FoIP (Fax over IP), try to debug them and let
> us ,now so T.38 support on OpenPBX could be improved.
>
> What is the problem you have? OPBX->PSTN->Fax Machine or Fax Machine ->
> PSTN -> OPBX
My problem is OPBX->PSTN->Fax Machine, RxFax seems to be working just
fine. In fact I have discovered that if I set the Fax Machine
(recipient) end to 'fax only' mode - the faxes come through just fine.
I only have a problem when the fax machine is in dual (fax/tel) mode,
which suggests a problem in the initial CNG (call setup) stage. The
debugs I have show very little - other than the normal stuff you would
see with a voice call (just g711 alaw negotiation and RTP traffic but no
T.38 switchover/udptl messages at all?).
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