Warning message

  • Cisco Support Forums is in Read Only mode while the site is being migrated.
  • Cisco Support Forums is in Read Only mode while the site is being migrated.

Unable to send faxes thru H.323 gateway

Unanswered Question
Sep 15th, 2014
User Badges:

Hello guys,

Recently I have been given the task to troubleshoot this issue where our cisco gateway is unable to send faxes although I am able to receive fine. We are using Righfax to send/receive faxes.

I am not able to figure out what is the issue, I have attached our gateway config. Kindly if anyone can have a look pls let me know what could be the issue.

Thanks & Regards,

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Manish Gogna Mon, 09/15/2014 - 03:12
User Badges:
  • Cisco Employee,

The configuration looks okay as per the following doc


The only thing that i can think of is to try changing the 'fax protocol t38 version 0' to 'fax protocol t38 version 3' under dial-peer 110 and test.

If the fax still fails, please capture the debugs as suggested in above doc.




Essam Nasir Mon, 09/15/2014 - 19:50
User Badges:

Hi Manish,

Thank you for your reply.

Yes I have looked at that file and I even changed t38 version to 3 but it's still the same. I have attached the debug output for debug cch323 all.

I should also add that when dialing the fax number I do get the fax tone, but only for 4-5 secs, and then it goes to fast busy tone.

Thanks & Regards,

Jean-Christophe... Wed, 09/24/2014 - 10:46
User Badges:


Grab traces from your Right Fax server. I suppose it's a SIP integration ?

Check if the Region codec used between CUCM and your SIP Fax is set to use G711 codec and not a compressed codec.

Essam Nasir Tue, 09/16/2014 - 21:47
User Badges:

Any help on this issue guys, it will be greatly appreciated.


Thanks & Regards,


This Discussion

Related Content