endpoints

Based on the number of ads I see for headphones, earbuds, and headsets it seems pretty clear that there is huge demand for them. In my childhood home there was one set of headphones, and I don't recall them getting much use. Today, desktop conferencing, softphones, portable music, and cellular devices are creating a huge market for headphones and headsets.

PBX vendors have historically distributed TDM telephones through authorized channels. This made sense as telephones were only purchased by existing customers and customers often required additional hardware or services to make them work. The same was true with early (proprietary) VoIP endpoints.