What ports need to be forwarded to enable incoming Polycom calls? I have a Polycom VSX7000e device receiving the calls. I've found numerous white sheets and spoken to Polycom tech support. (Their level of apathy is discouraging.) The following ports look to be the most reasonable. Has someone actually configured a firewall for incoming Polycom calls? Do these values look correct?
1. 1720 H.323 call setup TCP
2. 5060 SIP call setup TCP and UDP
3. 3230-3237 Signaling and control for audio, call, video, and data/FECC, TCP and UDP
4. 1503 (optional) T.120 data collaboration TCP