[VOIPSEC] H.460.17/18/19 in OPAL?

[Simon Horne]

Neither PacPhone nor GnuGk are built off OPAL and I'm not currently working 
with Opal. All the open source H.460 work is being done in OpenH323 (the 
latest development source code is available in the GnuGk source code 
download on the pacphone website) most of it has been ported to 
OPAL.  H.460.18/19 is currently not implemented (only the ASN.1 files are 
parsed). PacPhone uses the GnuGk method which predates H.460.18/19. There 
has been some commercial interest particularly with GnuGk to add 
H.460.18/19 but as yet no-one has stepped up to make that happen.

To be honest I like the concept of H.460.17 & GnuGk as they use a reliable 
transport pinhole to traverse signalling across the NAT (TCP rather than 
UDP) so like I recently discovered some cheap WLANs can occasionally become 
flaky and brown out, the keep-alive TCP connection can instantly detect if 
the connection is broken and notify both the client (via a notification) 
and the server. With UDP you don't know the WLAN has browned out until you 
try and make the call and the response times out.

Simon


At 02:17 AM 8/06/2007, Michael Billerbeck wrote:
>Hi Simon,
>
>Several months ago I've seen that you've been working on H.460 support
>(H.460.18/H.460.19) in OPAL (OpenH323 v2):
>http://www.openh323.org/pipermail/openh323/Week-of-Mon-20060515/077132.html
>I can't find out if it is used in OPAL. Can you please tell me more or where
>can I get information on this?
>
>Thanks,
>Michael
>
>
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