Polycom ViewStation FX User Manual page 180

Appendix A
ViewStation FX/VS 4000 User's Guide
3. Select System is behind a NAT.
4. Enter the NAT's external IP address into the NAT outside
(WAN) address field.
Write down the Fixed TCP and UDP port numbers displayed on
this screen. These numbers are the following default numbers:
TCP: 3230 to 3231
UDP: 3230 to 3235
5. In your NAT, reset the fixed ports from step 4 to be permanently
open, and redirect them to the IP address of your ViewStation
FX or VS4000.
6. To accept incoming calls, open and redirect port 1720 to the IP
address of your ViewStation FX or VS4000.
166
Network Address Translation
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