Is there any possibility to configure the video system to allow ONLY whitelisted IPs/numbers to call in?
You do not state which VC endpoints you are using. This information would be helpful. You also do not state if the VC endpoints are registered to Lifesize Cloud. Devices registered to Lifesize Cloud should not need to have this feature enabled.
For systems that are not on Cloud, Icon and 220 video conferencing endpoints running the latest firmware have an anti-spam settings. These settings include an IP address white list. For more information, please refer to the following articles
AntiSpam Configuration for 220s
I hope this was helpful.
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