[SIP Forum Chair Hat On]
This is a sad state of affairs, if we have to break SIP to make it
work for broken implementations.
I can see this kind of work going on outside the IETF, but it seems
out of place to hack Internet protocols willy-nilly to make them work
for either non-Internet deployments or to interoperate with obsolete
or broken implementations.
On Jul 14, 2008, at 8:02 AM, Dan York wrote:
On Jul 13, 2008, at 12:49 PM, Hadriel Kaplan wrote:
But for a lot of cases they're not modifying To/From for that
reason - they're modifying it to either "fix" them for specific
interop reasons, or to hide topology (ie, when it contains IP
Addresses or hostnames). Those are the cases I'm trying to get the
information through.
DY> Just to add to what Hadriel said, one of the additional
arguments *for* an SBC that I've had given to me by different
vendors at various shows is that they can "normalize" SIP and make
SIP interoperability actually work between different vendors. The
SBC understands how exactly Vendor X speaks SIP and how exactly
Vendor Y speaks SIP and can then enable the interconnection/
interoperability. So the reality is that there are SBCs out there
that view as part of their function to "fix" SIP so that it can be
interoperable. In doing this "fixing", one can expect that the SBCs
would be changing headers.
Regards,
Dan
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