![](/images/new-backgrounds/1169518/169518575x1.webp)
TANDBERG 770/880/990 MXP
| Function |
| Port |
| Type |
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| Gatekeeper Discovery (RAS) | 1719 |
| UDP |
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| Q.931 Call Setup | 1720 |
| TCP |
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| H.245* |
| Range |
| TCP |
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| Video |
| Range |
| UDP |
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| Audio |
| Range |
| UDP |
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| Data/FECC |
| Range |
| UDP |
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| MultiSite + Duo Video |
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(*)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.
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