Hi Sir£¬ <br>>The operation system on my computer is fedora 2.0 asterisk 1.0.x, I have set up spandsp0.0.2 pre18 on my computer.Further more, a SHARP fax has been registered on my asterisk Server through gateway. after that, I test SHARP fax with virtual fax and the result shows that rxfax is working normally. However, txfax can not work normally during the test whether <br> <br>exten=>xxx,txfax(/home/usr/test.tiff|caller) <br>IS CONFIGURED IN <br> <br>extension.conf <br>OR test.call <br>hannel:sip/2200 <br>application:txfax <br>data:/home/usr/test.tiff|caller <br>IS ADDED INTO "outgoing". <br> <br>The real fax receives blank pages or pages with all vertical line, which is not the worst result.Usually the real fax reports error and "cli" receives no error information except one ¡° Got SIP response 415 "Unsupported Media Type" back from 192.168.1.97¡±(192.168.197 is the IP of gateway). So can I say it is because the Media type is not supported? <br>But the things really confuses me is that there isn't any problem when the edition spandsp0.0.1k is used. <br> <br>P.S, I'd like to know what should I do if I want to fax between two virtual fax. <br> <br>I'm looking forward to your answer. <br> <br>Yours <br> <br>