Comparison of Facsimile Transmission over T.38 and V.152 Procedures for fax passthough and relay are described in V.152 and T.38, respectively. Both allow existing PSTN fax machines to transmit images over the IP network, but each one has its advantages. \tT.38 Transmission Over SRTP The T.38 standard lacks a standardized method to secure the image sent. Using SRTP to transfer T.38 data can provide one way to increase the security of T.38. \tProposed Modifications to T.38 In order to improve on evolutive compatibility and avoid confusion, T.38 must continually be updated and fixed. This document summarizes the proposed changes to T.38. \tT.38 Prioritization in a Universal Gateway T.38 is the most commonly implemented solution for real-time facsimile over the Internet. When implemented in a universal gateway, T.38 must compete with other types of IP traffic for resources. \tComparison of T.38 Transmission Over UDPTL or RTP T.38 provides two UDP-based means for transporting its data: UDPTL and RTP. While the two are used in a very similar manner, each one has its advantages over the other. \tT.38 Image Extraction from Captured Network Data T.38 is one form of communication that could be used to facilitate criminal activities. Lawful interception technologies give agencies the ability to process collected criminal communications. \tSecure Faxing with JPSEC Faxing documents using Secure JPEG 2000, also referred to as JPSEC, is a method to secure image contents with stronger encryption and data integrity than what is provided by T.30.