Hi there,
I have been trying the GNUGK Proxy extensively the past days.
Hacking the code, I was able to establish a phone call from an unregistered
Endpoint to a GW that is inside another GK's zone. That way, my proxy works
only as a proxy (GW) and does not work as a GK.
Check out the graph:
GK GK
Zone 1 Zone 2
| |
Planet IP-Phone <------> GNUGK "Hacked" Proxy <-----> MAX TNT GW
That way it worked ok for both fast start and non fast start procedures.
After that I tried replacing the Planet IP-Phone with a Cisco GW. That is when
I had the following problem:
After the MAX TNT GW receives the "facility TerminalCapabilitySet" message, it
responds with an "empty TerminalCapabilitySet" and after that sends a
"ReleaseComplete" message, with ternination cause value == 42 (Switching
Equipment Congestion).
Find attached the messages flows for the 2 cases mentioned above.
One thing that catched my attention was that for the IP-Phone, the first
"OpenLogicalChannel" message is sent by the MAX TNT Gw.
And for the other case, the Cisco GW is the first one to send an
"OpenLogicalChannel" message.
I am not an expert in the H323 protocol. So, if anyone could give me an idea
of what is going on here, I would really appreciate your help.
thanks in advance,
Pablo SalinasAttachment:
llamada completada planet-proxy
Description: Binary data
