[cisco-voip] UC500 Analog Faxes on fxs ports configured with stcapp

[Nick Matthews]

If you remove the SCCP app from the pots dial peers you will simplify
the faxing.

Right now since SCCP (or MGCP) is controlling the port the system is
forcing a DSP into the call.

If you use basic H.323 control and the call is going out another TDM
port on the UC540 it will do a 'DSP bypass' and skip the PVDM
processing.  This is basically equivalent to plugging the fax machine
into the TDM port and there is no fax over IP happening at all
(ideal).

It's very possible you've got new slips on your PRI or the carrier
network has started getting slips.

-nick

On Tue, Jul 5, 2011 at 10:33 AM, Anthony Kouloglou <akoul at dataways.gr> wrote:
> Hi all,
> i have a UC540 running CME 7.1 for a year.
> All fxs ports are configured with stcapp thus they are registered as SCCP
> devices.
> Suddenly, one year later with no problems so far, faxes are coming corrupted
> or not at all while in the same moment, the same fax machine can send faxes
> with no problem!
> Is there something i can look in the config?
> The guy who supports the fax machine says that there is no problme with the
> device.
> Any help will be much appreciated.
>
> BTW: UC50 uptime is 22 weeks.
>
>
> Best Regards
> Anthony
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