We want to connect our Salesforce org with our Avaya Workplace telephony system. I find the documentation of both Avaya and Salesforce less then helpful. Avaya's documentation is lacking and Salesforce's documentation is confusing.
Case in point, Salesforce's documentation on OpenCTI: "To display CTI functionality in Salesforce, Open CTI uses browsers as clients. With Open CTI, you can make calls from a softphone directly in Salesforce without installing CTI adapters on your machines."
That sounds great, Avaya offers several (why???) Chrome browser plugins that promise to connect Salesforce and Avaya.
But the Salesforce documentation continues: "After you develop an Open CTI implementation, you can integrate it with Salesforce using Salesforce Call Center."
In short, I would like to know what is the bare minimum we need to connect Salesforce to an Avaya Workplace telephone system, so that we can receive and place calls inside Salesforce using a softphone. We use Lightning Experience on a Sales Cloud license (not Service Cloud).