Polycom RMX 1500 Administrator's Manual page 478

Chapter 14-Network Services
An error message, Bad IP address version, is displayed and the New
Participant dialog box remains open so that the participant's address
can be entered in the correct format.
• Participants that do not use the same IP address version as the RMX
in ongoing conferences launched from Meeting Rooms, Reservations
and Conference Templates, and are disconnected. An error message,
Bad IP address version, is displayed.
IP Security (IPSec) Protocols are not supported.
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