Some people trying to run the latest BlackBerry PlayBook Video Chat app at work may notice that it is not working do to blocked ports. For most home and personal networks this should not be a problem since you probably are not blocking outgoing ports but many companies do lock down outgoing ports which may stop your BlackBerry PlayBook from being able to Video Chat. RIM was nice enough to detail which ports you would need to forward to enable BlackBerry PlayBook Video Chat in a restrictive network though I wish you the best of luck trying to get your network administrators to open them:
- 443 (TCP)
- 3478 (TCP)
- 3478 (UDP)
- 45535 to 65535 (UDP)
- NOTE: Depending on the Network Address Translation (NAT) configuration for the network, additional ports may be used for video traffic.
You can find more details at this link