Is there any access-restriction applied on the inside interface of a firewall ? If so, you will have to open up appropriate ports as listed on the pdf.. make sure you open UDP 16384-32767 for communication between voice gateway to CUCM on the outside interface, for return voice traffic..
you can just give a normal static statement, which does not nat the traffic.. eg, if the CUCM has 10.1.1.1 as ip, u can give
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...