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

[Nick Matthews]

If you've got it running H.323, local-bypass is configured under the
voice-card 0 (default), and there are no slips on the T1 'show
controller t1', then it's not a router problem and there's something
going on in the provider network or a local fax machine issue.

-nick

On Tue, Jul 19, 2011 at 5:52 AM, Anthony Kouloglou <akoul at dataways.gr> wrote:
> Hi,
> i am back to this.
> It didn't work also!
> I simplified the config with h323 config but still, faxes could not be
> received!
> I noticed that the UC was up for 30 weeks so i reloaded it.
> Ever since then, no problem exists on receiving faxes!!
> uc is running:flash:uc500-advipservicesk9-mz.124-24.SB
> is this known bug?
> What could have caused it?
>
> On 5/7/2011 22:42, Anthony Kouloglou wrote:
>
> Thanks Nick,
> i have already configured a dial-peer pots with no stcapp and also inserted
> no vad in the config.
> I will wait to see how it goes.
>
> On 5/7/2011 9:23 μμ, Nick Matthews wrote:
>
> 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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