Zoom is migrating Conference Room Connector (CRC) to only support Transport Layer Security (TLS) 1.2+ for increased data security.
TLS 1.1 will be disabled on March 26, 2021 for the US West and all non-US data centers. This change will take effect for US East data centers on April 2, 2021.
This change will impact all SIP/H.323 devices attempting to connect to a meeting that requires device encryption. This will be enforced for all device types: both managed with an API connector or unmanaged by Zoom.
Please refer to https://support.zoom.us/hc/en-us/articles/360049717112
for more details.