Digi Connectport - TLS 1.0 Encryption

At what level does the TLS encryption happen on a Connectport or a Portserver MEI? I am seeing TCP packets in Wireshark at the Transport level even though I have TLS 1.0 turned on in the OS driver section.
Thanks.

The encrypted RealPort protocol first opens an unencrypted TCP socket communication channel. Within the TCP socket communication channel a RealPort protocol communication channel is established wherein the realport protocol communication channel is encrypted using TLS 1.0

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Many thanks! Solved a non-existent issue with Uni IT Dept.