I am testing a IP-to-IP GW function.
SIPGW -(SIP)-> IP-to-IPGW -(H323) -> CUCM -> H323GW
I found that "Connect" from H323 couldn't convert to SIP message "200 OK".
Regarding the connect message, H245 tunnel is off and FS is off.
In case of H245 is on as below, I have confirmed IP-to-IPGW returns "200 OK" to SIP GW.
SIPGW -(SIP)-> IP-to-IPGW -(H323) -> H323GW
the IP-to-IPGW is ISR with IOS 12.4(16).
Why can't the router send "200 OK" when H245 tunnel is off?