This is episode 61 of Get Your Tech On, our show on All Things DOCSIS.  I’m Brady Volpe, Founder of The Volpe Firm and Nimble This. We have two guests with us today, John Downey, CMTS Technical Leader at Cisco Systems, welcome John. 
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DOCSIS Speeds

 
Sticking with 1.5 Gbps total downstream capacity in a node with 100 subscribers at 1024-QAM OFDM – let’s do the math:

1 Gbps downstream per sub
25x oversubscription
25 x 1.5 Gbps = 37.5 Gbps capacity
37.5 / 100 = 375 Mbps dedicated downstream

Typical Netflix Stream: 3 GB/hour for HD or 50 Mb/min or ~8 Mbps

Average of 2 streams per home = 16 Mbps
250 homes / node = 4 Gbps

thoughts on how many DOCSIS 3.1 CPE justify trading DOCSIS 3.0 spectrum for DOCSIS 3.1 spectrum 
should you upgrade all of your modems to DOCSIS 3.1?
What is WiFi 6 802.11ax
https://www.tp-link.com/us/wifi6/#:~:text=What%20is%20Wi%2DFi%206,of%20devices%20in%20the%20world.

 

3 Gbps vs 1.3 Gbps
Sixth generation Wifi specification
Provides better user experience
Better coverage in the home
Better efficiency
Faster speed and larger coverage
Uses OFDM at up to 1024-QAM (previous was 256-QAM) – 25% faster
Can send and receive data at the same time
Supports more devices on the network at the same time
4x longer symbols and 160 MHz (previously 80 MHz) channel bandwidth
But! – your computers and phones also need to support Wifi 6

Wi-Fi 6 is the next generation standard in WiFi technology. Wi-Fi 6 also known as “AX WiFi” or “802.11ax WiFi” builds and improves on the current 802.11ac WiFi standard. WiFi 6 was originally built in response to the growing number of devices in the world. If you own a VR device, multiple smart home devices, or simply have a large number of devices in your household, then a WiFi 6 router might just be the best WiFi router for you. In this guide, we’ll go over WiFi 6 routers and break down how they’re faster, increase efficiency, and are better at transferring data than previous generations.
Cable modems with Wifi 6:

Netgear Nighthawk CAX80 DOCSIS 3.1 WiFi 6
Arris Surfboard AC2350
Inflection point where you optimize DOCSIS 3.1 spectrum and customer experience

John’s session at Cisco Live:  https://www.ciscolive.com/global/on-demand-library.html?#/session/1572903547065001S2g2
End Podcast
John and Jason thank you for your time today. This was a great episode.  Our next Episode 62 in July with Technetix CTO.   
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Thank you so much for being here and we will see you next month. 
Thank you so much for being here and we will see you next month.
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