[cisco-voip] T37 fax problem

[mthompson729 at gmail.com]

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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