TANDBERG 1500MXP - Manual (Page 257)

Appendices
245
Function
Port Type
Gatekeeper Discovery (RAS) 1719 UDP
Q.931 Call Setup 1720 TCP
H.245* Range 5555-5574 TCP
Video Range 2326-2405 UDP
Audio Range 2326-2405 UDP
Data/FECC Range 2326-2405 UDP
MultiSite + Duo Video
(*) Note: While using MultiSite, if a site is disconnected and reconnected without terminating the
entire conference, the next site to be connected will have a H.245 port outside of the specified
range. If this functionality is required through a firewall, the range of TCP ports can be extended
past 5564. However, if a site is disconnected and reconnected, without ending the conference
enough times one can quickly end up outside of this range again.