[asterisk-bugs] [JIRA] (ASTERISK-21373) Asterisk 11.2.1 T38 fax with NAT and SIP PROXY + RTPPROXY issues

[Marcello Lupo (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=205835#comment-205835 ] 

Marcello Lupo commented on ASTERISK-21373:
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Hi,
I'm not an RFC expert but may be something useful can be found here: