I'm having a strange problem with a new Callmanager 4.2(3) system i've just installed.
We have an intercluster trunk setup between callmanagers, both CCM versions are 4.2(3). We can receive inbound calls no problem whatsoever. When dialing outbound, after the last digit is pressed, we receive a message that says "your call cannot be completed as dialed, please consult your directory and call again etc..".
To me, this sounds like a CSS / partition problem, but i've checked it over and everything seems ok.
Someone suggested that it may be a firewall problem. That a port may be blocked outbound, or inbound on a firewall between the two CCM systems.
Anyone have any insight with problems like this ? What ports need to be open on firewalls for call setup ? I thought only ports 1720, and 2000 needed to be opened. Are there any UDP ports that need to be opened ?
Thanks again for any help in advance.