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Beginner

Fax Over SIP Trunk

Hi,

I am using SIP trunk and have 10 DID numbers for FAX machine. I have to configure FAX with IP Telephony system, I am using ATA 186 to support fax. I just go through the Cvoice-Book, I come to know from internet, that lot of user facing problem, lots of people not sure wheather they should go for Pass-Through or Fax-Relay, or the speed. Let me know which excatly its going to work, I am using CUCM 8.6 version and a voice gateway.

- Waleed

Everyone's tags (2)
8 REPLIES 8
Beginner

Fax Over SIP Trunk

Hi Waleed,

     Using t.38 Relay is the bect way to go since that has become a market standard. You can configure the ATA for it from the ATA Configuration Page on the CUCM once you get the ATA registered.

Also, it should work be default on you SIP trunk. Please let me know if you run into any issues.

Regards,

Jagpreet

Hall of Fame Master

Fax Over SIP Trunk

I don't think ATA186 supports protocol based T.38 which is the facto SIP trunk standard, you will need to either use passthrough if supported by carrier or change ATA186 to 187 or VG202, 204, 224 or FXS ports.

HTH,

Chris

Beginner

Fax Over SIP Trunk

Waleed,

     Chris is correct. ATA 186 does not support t.38. My apologies, I mistook it for 187.

Regards,

Jagpreet

Beginner

Fax Over SIP Trunk

Thanks Chris and Jagpreet, so I have to use passthrough ? I am using 186 as I have this only, I will get the Fax machine in an hour, let me know the configuration required for me to do in voice gateway as well as on CUCM, thank you already.

- Waleed

Beginner

Fax Over SIP Trunk

I have check the data sheet of ATA 186, it says this only

"

Fax**

• G.711 fax pass-through

• G.711 fax mode

**  Success of fax transmissions up to 14.4 kbps depends on network  conditions and fax modem/fax machine tolerance to those conditions.  Network must have reasonably low network jitter, network delay, and  packet loss rate. "
So please let me know the configuration of pass-through which I have to do on Voice gateway or in CUCM, I have check Cvoice book, it show different configuration.
- Waleed
Beginner

Fax Over SIP Trunk

I just follow the link procedure pasted below, but its also not working, any one can have the same issue.

http://www.cisco.com/en/US/docs/voice_ip_comm/cata/186_188/2_15_ms/english/administration/guide/sccp/sccpaapd.html

- Waleed

Beginner

Fax Over SIP Trunk

I have done some troubleshooting, internal to iternal is working, from outside to inside working OK, but the problem is left with inside to outside only, I have done some debugs come up with this.

Debug command: debug voice ccapi all

   Call Entry Is Not Found

Dec 17 05:50:57.916: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Fax Cap Is Invalid; Fax Cap=0

Dec 17 05:50:57.916: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Codec Is Invalid; Codec=4294967295

Dec 17 05:51:03.704: //-1/xxxxxxxxxxxx/CCAPI/ccSetupReqDataTDFreeHelper:

   data=2B7D67C4

Dec 17 05:51:03.704: //-1/xxxxxxxxxxxx/CCAPI/ccFreeTdRequestDataSip:

   sipDatap = 2B7D67C8

Dec 17 05:51:03.704: //68758/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:03.704: //0/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:03.704: //68758/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:03.704: //68758/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:03.704: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Fax Cap Is Invalid; Fax Cap=0

Dec 17 05:51:03.704: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Codec Is Invalid; Codec=4294967295

Dec 17 05:51:04.376: //-1/xxxxxxxxxxxx/CCAPI/ccSetupReqDataTDFreeHelper:

   data=2B7D374C

Dec 17 05:51:04.376: //-1/xxxxxxxxxxxx/CCAPI/ccFreeTdRequestDataSip:

   sipDatap = 2B7D3750

Dec 17 05:51:04.376: //68759/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:04.376: //0/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:04.376: //68759/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

MOSA_OC_VG_01#

Dec 17 05:51:04.376: //68759/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:04.380: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Fax Cap Is Invalid; Fax Cap=0

Dec 17 05:51:04.380: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Codec Is Invalid; Codec=4294967295

MOSA_OC_VG_01#

MOSA_OC_VG_01#

Dec 17 05:51:06.048: //-1/xxxxxxxxxxxx/CCAPI/ccSetupReqDataTDFreeHelper:

   data=2B7D634C

Dec 17 05:51:06.048: //-1/xxxxxxxxxxxx/CCAPI/ccFreeTdRequestDataSip:

   sipDatap = 2B7D6350

Dec 17 05:51:06.052: //68760/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:06.052: //0/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:06.052: //68760/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:06.052: //68760/xxxxxxxxxxxx/CCAPI/cc_get_call_entry:

   Call Entry Is Not Found

Dec 17 05:51:06.052: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; u all

All possible debugging has been turned off

MOSA_OC_VG_01#

MOSA_OC_VG_01#

MOSA_OC_VG_01#Fax Cap Is Invalid; Fax Cap=0

Dec 17 05:51:06.052: //-1/xxxxxxxxxxxx/CCAPI/cc_api_faxcap_to_bitrate:

   CALL_ERROR_INFORMATIONAL; Codec Is Invalid; Codec=4294967295

. Any one have a idea about this, help would be a great if it comes from your side. Thank you.

- Waleed

Beginner

Fax Over SIP Trunk

Anyhow I solved the problem, by changing some parameters, also what I find out, I make some translation pattern without * and route that call or send fax without dialling * at the start and make some dial peer destination pattern with the same, I mean without *, it worked.

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