Polycom VSX Series Administrator's Manual page 213

The following table shows Global Management System port usage.
Port
21
24
80
80
3601
3603
389
1002
The following table shows other VSX port usage.
Port
21
23
24
Function
(FTP) Software upgrades and provisioning for VSX
systems and ViewStations
(FTP) FTP Telnet trace log
(HTTP) Pulling VSX system, ViewStation, and VS4000
information
(HTTP) Software upgrades and provisioning for iPower™
(Proprietary - data traffic) - Global directory data
TCP - Pulling ViaVideo® information (since might be
non-web server computer)
LDAP and ILS
ILS
Function
(FTP) Software upgrades and Global Management System
provisioning
(Telnet) For diagnostics
(FTP) API control
Appendix
Appendix - 9