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

[Anthony Kouloglou]

Hi Nick,
thanks for your quick response.
It is not a E1/T1 but a ISDN BRI so i can't check if there are slips.
The issue is that when i reloaded the UC, the problem disappeared!!

On 19/7/2011 16:12, Nick Matthews wrote:
> 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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>>
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