Hi, I am using T.38 fax protocol in cisco access servers 5850 to send voip traffic to Colombia. But i had experoenced an particular issue when I try to send faxes, i could established the fax call then after scan the first page the connection is dropped. Using and sniffer i could see that after scan the first page my AS580 send a menssage to my media gateway (cisco 1760) that change the T.38 session to voice session and it produce call drop. i have tested wit cisco fax relay and pass-through options, with the same results.