How to determine if using TLS (as opposed to SSL v3) when using Punchout from the buyer side in EBS?

I’m running EBS 12.1.3 on RHEL 5.7. We run Punchout “model 2b”, cXML directly to a Supplier Hosted Catalog. I’m told the supplier runs both SSL 3.0 and TLS, but is unable to turn off SSL 3.0 at this point.

I’ve reviewed “Punchout in Oracle iProcurement and Exchange Fails After Supplier Site Migrates From SSLv3 to TLS Protocol (with SSL Handshake SSLIOClosedOverrideGoodbyeKiss) (Doc ID 1937220.1)” which addresses errors when the supplier turns off SSLv3 and runs TLS.

But it’s not clear if the patch actually forces TLS or simply accommodates it. Given the fact that my supplier is currently running both I have no clear way to know if the patch actually addresses the issue and I’d like some level of confidence that when they finally disable SSL v3 the punchout will still function.