Hi I have a VOIP at the office and lately I?ve been getting complaints that not all call get through, and it?s something that happens very sporadicly.
So I?m thinking maybe I don have all the required ports open in our firewall.
I have the 16384-32767 range, and other ports like the 2000.
Are there any other ports that should be open and I?m not doing this right.
We have Cisco CallManager 3.3 and Cisco IP Phones 7940