[asterisk-users] Error in ReceiveFax with T.38 -- Asterisk 1.6.0.7-rc2

[Santiago Gimeno]

Hello,

In my scenario, the asterisk machine is installed behind a CISCO
mediaGW in order to be able communicate with the PSTN. Asterisk is
configured to use T.38 to send and receive faxes.

I'm trying to receive a fax from a fax machine located in the PSTN.
Apparently everything goes well: the fax machine says the transmission
was successfully completed, and the fax file is successfully stored by
asterisk. The problem is that I receive this error:

WARNING[12229]: app_fax.c:650 in transmit: Transmission error

and the ReceiveFax function ends abruptly.

The log file with debug set to 4 is this:

asterisk[12127]: DEBUG[12229]: app_fax.c:166 in phase_e_handler: Fax
phase E handler. result=0
asterisk[12127]: DEBUG[12229]: app_fax.c:202 in phase_e_handler: Fax
transmitted successfully.
asterisk[12127]: DEBUG[12229]: app_fax.c:203 in phase_e_handler:
Remote station ID: 0034913121867
asterisk[12127]: DEBUG[12229]: app_fax.c:204 in phase_e_handler:
Pages transferred: 1
asterisk[12127]: DEBUG[12229]: app_fax.c:205 in phase_e_handler:
Image resolution:  8031 x 3850
asterisk[12127]: DEBUG[12229]: app_fax.c:206 in phase_e_handler:
Transfer Rate:     9600
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW
T.30 Changing from state 2 to 32
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW
T.30 Changing from phase T30_PHASE_E to T30_PHASE_CALL_FINISHED
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW FAX
Set rx type 8
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW FAX
FAX exchange complete
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW FAX
Set tx type 8
asterisk[12127]: DEBUG[12229]: app_fax.c:130 in span_message: FLOW FAX
FAX exchange complete
asterisk[12127]: DEBUG[12229]: channel.c:3470 in set_format: Set
channel SIP/192.168.0.253-081b9c18 to write format alaw
asterisk[12127]: DEBUG[12229]: channel.c:3470 in set_format: Set
channel SIP/192.168.0.253-081b9c18 to read format alaw
asterisk[12127]: WARNING[12229]: app_fax.c:650 in transmit: Transmission error

Any idea of what might be happening?

Thank you in advance,

Santi