Cisco gatekeepers are using non-standard IZCT tokens in LRQ/LCF/Setup, but I doubt if they are widely supported by gateways other than Cisco. Also not all Cisco gateways/IOS versions support this feature.
----- Original Message ----- From: "Tamas J" <thomasj@xxxxxxxxx>
Sent: Sunday, April 10, 2005 4:35 PM
I know that this topic was discussed already (a bit) but I still don't know how to solve the question with neighbors in directed mode.
What is the problem?
The message flow when call comes from a neighbor which runs in directed
mode (if I'm wrong, please let somebody correct me:) (dm=directed mode,
rm=routed mode):
origGW-->remoteGK[dm]00-->myGK[rm]---->GW
ARQ---------->
LRQ-------------> <-------------LCF
<----------ACF Setup ---------------------->
????????
In this case myGK does not know about the originator of the Setup message, so it will drop the call. I cannot even authorize the call because the originator gateway is not known. In the previouse discussion there was a recommendation to store some information into LCF sent back to remoteGK which should/would appear in the following Setup, thus the call can be paired with authorized calls.
Could anybody tell me if there is such thing and if yes, how interopereable is it. Right now we have just a very simple solution: to requere partners to use GK in routed mode or to send calls as GW-GW (Setup).
Any hint?
Regards, Tamas
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