 ztmikeMark for moderationPremium
join:2001-08-02
Michigan City, IN | Cablevision boost I'd be happy with 30/5 |
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| Will DOCSIS3 be able to surpass the speed of verizon Fios? outta curiousity. thanks |
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Reviews:
 ·Comcast
·Charter
1 edit | said by Justin413:Will DOCSIS3 be able to surpass the speed of verizon Fios? outta curiousity. thanks The answer is not easy and is not all about the "speed" quoted by marketing or the technology used (fiber vs. cable). The speed marketed refers to the last mile only and does not take into account
• how fast your PC will go (processor, NIC, disk speed, etc)
• the oversubscription of the Telco CO or Cable CMTS
• the speed and congestion of ISP traffic exchange points
• the speed of the content
The real answer is, both will be very fast no matter what they hype or FUD is. 8M Powerboost will have a similar end user experience as 20M fiber for 98% of all users. |
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as6o
join:2005-05-24
Pittsburgh, PA | reply to Justin413
A more direct answer to your question:
No. FIOS technology is capable of more bandwidth than DOCSIS3:
DOCSIS3: 160.00 Mbit/s
FIOS BPON: 622.08 Mbit/s (what they started out installing)
FIOS GPON: 2.4 Gbit/s (what they are installing now) |
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dr2500
join:2005-09-09
Lancaster, PA | reply to Justin413
No. |
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 RARPSL
join:1999-12-08
Suffern, NY | reply to as6o
said by as6o:A more direct answer to your question: No. FIOS technology is capable of more bandwidth than DOCSIS3: DOCSIS3: 160.00 Mbit/s FIOS BPON: 622.08 Mbit/s (what they started out installing) FIOS GPON: 2.4 Gbit/s (what they are installing now) The question is not the total bandwidth but how much is allocated to the user. If you go to DOCSIS with 20 users sharing that 160 Mb/s, that is only 8Mb/s PER USER not the claimed 160 Mb/s. Also, you have to remember that all DOCSIS 3.0 does is allow the user to be using more than one channel at the same time instead of being restricted to one channel. It thus only reallocates the bandwidth (channels) on that node leg in a different way. You still must split the nodes as at present since there is a fixed number of channels to use in each node segment.
This same "how to cut up the pie" requirement also applies to the FIOS Bandwidth (you need more pies to give larger pieces or you have less people getting pie slices if you keep the number of pies constant). |
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 telcolackey5The Truth? You can't handle the truth
join:2007-04-06
Death Valley, CA | reply to as6o
This is a little like comparing apples to oranges.
2.4Gbit/sec is over the entire FIOS GPON and, by default, shared by all subscribers in a fiber serving group.
DOCSIS3.0 delivers 160M using only 4 of say 125 6Mhz channels. This could be shared, dedicated or muxed to even higher speeds depending on the need. The other channels are used for analog or digital TV, HD, VOD, voice services, etc. These allocations can also be shifted around.
Either way, both deliver the needed speeds for todays user experience and each will have technology increases over the next few years.
The major REAL business difference is FIOS is new and EXTREMELY expensive to install. Verizon is going to require MANY years to recover this investment and during that time technology will become cheaper after Verizon spends all the up front $$. |
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Reviews:
·Comcast
| So wrong , quoting the provider of some of the equipment they are using for FIOS.
"Based on these trends and predictions, APON/BPON will no longer have the throughput to support the average home in 3 years, while GPON will have the throughput to support those same homes for almost 10 years. Plus, if these predictions are off, GPON can use CWDM technology to provide up to 4 times the current 2.3Gbps of raw bandwidth using the same fiber infrastructure." (Firmware upgrade needed)
This is per group of users. IE groups of 32 on the same "Shade". Verizon uses the same frequency but dedicates it to a different shade at the junction, where it is muxed into or out of the data stream and sent to it's destination.
"Based on these trends and predictions, BPON barely has enough throughput today. GPON will be able to provide the bandwidth for over 3 years, at which time; the provider will have to use multiple virtual GPONs over the same physical PON to support the same MDU Today 3 Years 6 Years 10 Years
Number of MDU 16 16 16 16
Appartments in each MDU 12 12 12 12
BW per appartment [Mbps] 3 12 27.5 37.5
Total BW [Mbps] 576 1536 5280 7200
10 /MDU customer base. This option is not currently available to BPON users. This is accomplished by using CWDM to supply 6 wavelengths for 3 different GPON networks. While this will require some equipment changes, the physical plant will be able to support the data needs for over 10 years. If these predictions are off, GPON can use CWDM technology to provide up to 4 times the current 2.3Gbps of raw bandwidth using the same fiber infrastructure."
Not bad.
"With CWDM technology, a single fiber plant can support up to 128 ONTs and up to 9.2 Gbps of raw data per shade. This is accomplished by using passive filters rather than passive splitters. Passive filters have a much smaller optical loss than passive splitters, so the overall link
budget can handle more optical splits with the same link budget."
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"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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Reviews:
·Comcast
| Oh yeah , notice how that bandwidth is per 128 ONT's  Verizon has a good plan with this system.
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"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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