Question on a NAT traversal requirement
OKUBO Sakae
okubo at MXZ.MESH.NE.JP
Tue Aug 22 04:09:55 EDT 2006
Dear NAT traversal experts,
TTC (The Telecommunication Technology Committee) is now working on
Technical Paper "Requirements for Network Address Translator and
Firewall Traversal of H.323 Multimedia Systems" to convert it to a
Technical Report in Japanese language.
I have a question on how to interpret the following part:
----------
9.3 Requirements on Signalling and Media Streams
b) NAT traversal mechanisms for H.323 multimedia systems shall
support no less than ITU-T H.323v3, H.245v7, H.225.0v4, and H.235v3.
All later versions of H.323, H.245, H.225.0 and H.235 may be
supported.
----------
Take an example of H.323 that has now v6. Which of the following
statements are true?
NAT traversal
1/ shall not support v1 or v2.
2/ may support v1 or v2.
3/ shall support v3.
4/ shall support v3 and in addition may support any combinations of
v4, v5 and v6.
5/ shall support v3 and may support v4, or (v4 and v5), or (v4, v5 and v6).
In other words, NAT traversal with the following support conforms to
this requirement:
a/ v3
b/ v4
c/ v5
d/ v6
e/ v3, v4
f/ v3, v5
g/ v3, v6
h/ v3, v4, v5
i/ v3, v4, v5, v6
j/ v4, v5
k/ v4, v6
l/ v4, v5, v6
m/ v5, v6
--
Best regards,
OKUBO Sakae
e-mail: okubo at aoni.waseda.jp
(<== sokubo at waseda.jp, valid until 31 March 2007)
Visiting Professor
Global Information and Telecommunication Institute (GITI)
Waseda University
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239-0847 Japan
H.323 videoconferencing: arranged by advice
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