MAC-PHY! When to MAC-PHY vs R-PHY Happy Friday Everyone. Today is May 11th and this is episode 38 of Get Your Tech On, our show on All Things DOCSIS. I'm Brady Volpe, Founder of The Volpe Firm and Nimble This a technology fan in cable. With us is, John Downey, “the prognosticator”. John is also CMTS Technical Leader at Cisco Systems, welcome John. And Jeff Finkelstein Executive Director of Advanced Technology at Cox Communication. Today’s topic is MAC-PHY. CableLabs has had a spec on remote Mac-PHY since 2015