[cisco-voip] T37 fax problem

[Mustafa Yadav]

hi guys

Sorry for late answer.But I have not found anything .I checked
controller for any error and control the config for clock.Everyting
seems correct.

On the other hand I saw  al ot of duplicate ack packet when i  listen
between router and mail server via ethereal.Do you think is this the
root cause?how I overcome this problem?
many thanks

On 8/14/09, mthompson729 at gmail.com <mthompson729 at gmail.com> wrote:
> Mustafa,
> not sure if you are running in on A PRI, I assume so. if you are, then you
>
> can look at the show controller T1 0/0/0 (or whatever controller) and make
>
> sure there are 0 errors on the line. ANY errors on that line will kill a
> fax. on an audio call, they would sound like pops in the background.
>
> a couple things to check:
> as mentioned below, make sure that your PRI is the primary clock...has to
> be primary, any slips at all will add to the issue.
> verify that there are no line errors (T-1 layer issues), those will show up
>
> as CRC errors and the like.
>
> if the above are clean, then move on to the Dial Peer debugging, which I
> assume are the same as other sites.
>
> hope that helps.
>
> On Aug 14, 2009 8:54am, Anthony Kouloglou <akoul at dataways.gr> wrote:
>> Hi,
>
>
>> also check this:
>
>
>> I had similar problems and the problem was resolved when i issued the
>> command:
>
>
>> /network-clock-select /
>
>
>
>
>
>> There were many slipped seconds before i issued this command.
>
>
>
>
>
>> Regards
>
>
>> Anthony
>
>
>
>
>
>> Oleg Skomorokhov wrote:
>
>
>
>
>> Try to set the fax rate to 9600 on the dial-peers, cisco says that some
>> problems can occur when receiving faxes on 14000 and higher speeds using
>>
>> FXS, ATA, or VGWs.
>
>
>
>
>
>> On Thu, Aug 13, 2009 at 10:41 AM, Mustafa Yadav mustafa.yadav at gmail.com
>> mustafa.yadav at gmail.com>> wrote:
>
>
>
>
>
>> Hi,
>
>
>
>
>
>> We are running T37 fax in several branches.But 3 of them are getting
>
>
>> most of the fax pages corrupted.I checked the config with the others
>
>
>> Everthing seems correct.IOS is
>
>
>> flash:c2800nm-advipservicesk9-mz.124-15.T9.bin and dsp is 9.4.910.
>
>
>
>
>
>> So the fax pages succesfully taken and I can see tiff files in the
>
>
>> mail server but mostly big chareccters and half Β blank page.
>
>
>> What could be the reason?
>
>
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>> --
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>
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