As communicated back in last year, Oracle is not longer actively supporting e7, and particularly e7 with WS4's. On April 15th of this year, the encryption protocol that your credit card processing gateway uses will no longer accept any inbound communications (i.e. accept credit cards) that are not TLS 1.2 or higher.
If you have all Workstation 5s, just a software update is required.
If you have any Workstation 4's - they must be replaced!
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