odog
Cable Centric Vendor Biased
Premium
join:2001-08-05
Norcross, GA
clubs:
 ·Comcast
·Metrocast Communic..
 ·Vonage
| reply to Jerm
Re: Yeah
Considering most upstreams are only running in D1.1 3.2MHz QAM16 and thus limited to 10Mbps using a D2.0 6.4MHz 64QAM upstream and a 4 X 256QAM downstream you'd have 160Mbps down/30Mbps up shared among 500-600 users. Upstream channel bonding is definitely going to be killer but traffic is still asymmetrical to the net so downstream is MUCH more important. |
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Done_Posting
Shoot to kill
Premium
join:2003-08-22
Toledo, OH
·buckeye cable
| Well said. Of course, we're assuming their plant is clean enough to run QAM64 returns (which is probably a safe assumption since they're spending time and money on pre-cert DOCSIS 3.0 gear in the first place). Nevertheless, there are still plenty of modems out there chugging along with QPSK!
- Tate
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Happiness is an OC-48 in your basement... |
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odog
Cable Centric Vendor Biased
Premium
join:2001-08-05
Norcross, GA
clubs: | I prefer to call QPSK...
QAM4, but hey that's just my glass half full mind seeing the bright side of things. |
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AquaSport
California - Sun, Surf, Traffic Jams
join:2007-05-03
California
·Comcast
| reply to odog
Re: Yeah
said by odog  :Considering most upstreams are only running in D1.1 3.2MHz QAM16 and thus limited to 10Mbps using a D2.0 6.4MHz 64QAM upstream and a 4 X 256QAM downstream you'd have 160Mbps down/30Mbps up shared among 500-600 users. Upstream channel bonding is definitely going to be killer but traffic is still asymmetrical to the net so downstream is MUCH more important. English, please.
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Out with the old, in with the Antique! 
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"Hey, have you heard the song... 'Bomb Iran?' *bomb, bomb, bomb, bomb, bomb, Ir...* n - never mind..." - John McCain |
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