call to fax machine being dropped

[yixiu0317]

We are using CUCM7.1(3), and try to integrate a fax server in the CUCM, call flow like this Fax server->CUCM trunk->h323 gateway->fax machine

When we do the debug isdn q931, we can see the call was setup, but after a while(around 10 seconds), the call was dropped. it seems that the far end(fax machine) send the disconnect request, please see the message

     ISDN Se 0/0/1:15 Q931: RX<-DISCONNECT pd=8 callref = 0x9393

     Cause i = 0x8090 - Normal call clearing

     Progress Ind i = 0x8288 - In-band info or appropriate now available

     ISDN Se 0/0/1:15 Q931: call_disc: PI received in disconnect; Postpone Sending RELEASE for callid 0xE0ED

If I make a call to the fax number using IP phone, there is no problem at all, the call will be released until I hang up the phone

Thank you in advance

[Gajanan Pande]

Hi,

If you are a Cisco Partner, you can email your queries to Cisco_Fax_Server@external.cisco.com .

Pls rate helpful posts.

GP.

[yixiu0317]

unfortunately we are not Cisco partner, any other suggestion regarding this issue

[Chris Deren]

Can you provide your GW config and version?

Did you configure it as T.38 fax protocol?

Chris

[yixiu0317]

Guys

Thank you for your suggestions, after I untick the option "Media Termination Point Required" in the h323 trunk between fax server and CUCM, it started to work