Eat Me
join:2002-09-25
Sussex, NJ
 ·PenTeleData
 ·Future Nine Corpor..
·VOIPo
·Vonage
| reply to highhorse
Re: Ego
Yeah right?
The limitations of coax - so why is the connaction between the ONT and the Actiontec done with MoCA, and why is FiOS using cable TV technology to deliver FiOS TV?
Why did FiOS have to drop analog from its TV service? Were they running out of bandwidth like they are throwing pot shots at the cable company for doing? |
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BosstonesOwn
join:2002-12-15
Everett, MA
clubs:
 ·Comcast
1 edit | said by Eat Me  :Yeah right? The limitations of coax - so why is the connaction between the ONT and the Actiontec done with MoCA, and why is FiOS using cable TV technology to deliver FiOS TV? Why did FiOS have to drop analog from its TV service? Were they running out of bandwidth like they are throwing pot shots at the cable company for doing? Guess you never heard of this thing called physics and signal degradation ?
Moca is done only to give the box low bandwidth usage. Perfectly fine. Especially when you control such a short piece of copper.
Ever see the limitations of ethernet on a long run of cat6 ?
Fios dropped analog because they know it was a waste of bandwidth or were willing to take the shot to get rid of the filthy whore that analog transmissions in general are. Plus the fcc gave them a wide open window to do so.
If you look at the fiber specs for the equipment they used , they are definitely not near running out of bandwidth , for them its as easy as adding another shade and using a newer ont on new subs homes.
--
"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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Eat Me
join:2002-09-25
Sussex, NJ
·PenTeleData
·Future Nine Corpor..
·VOIPo
·Vonage
1 edit | said by BosstonesOwn :
Guess you never heard of this thing called physics and signal degradation ?
Signal degradation has zero to do with available bandwidth.
quote:
If you look at the fiber specs for the equipment they used , they are definitely not near running out of bandwidth , for them its as easy as adding another shade and using a newer ont on new subs homes.
Which costs money. They are already in the hole $8000 per sub. |
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a333
A hot cup of integrals please
join:2007-06-12
Rego Park, NY
 ·Cingular Wireless
·Verizon Online DSL
| reply to Eat Me
The connection between the ONT and Actiontec are in fact done with MoCA, but remember, that coax is a direct line between the two devices... unlike the shared coax that serves hundreds of people with BOTH data and TV service. No one argues that coax has plenty of bandwidth...it's just that coax doesn't have quite the amount of bandwidth to share amongst entire neighborhoods. i.e. a coax connection between the ONT and router is more than sufficient to serve as a link between the two devices, but may not be nearly enough to serve hundreds of people concurrently.
And btw, a fun fact about the use of "cable" topology in VZ's network: Verizon squeezes that entire cable/video signal onto ONE wavelength. The bandwidth on that wavelength is usually just shy of the TOTAL bandwidth available on the outside plant of most cable networks. On FiOS, it's just one of the multitudes of lambdas they could use. Not to mention, this means there is a HUGE amount of room for data/IPTV/VOD.
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vzguy1
@bellatlantic.COM
| reply to Eat Me
said by Eat Me : said by BosstonesOwn :
Guess you never heard of this thing called physics and signal degradation ?
Signal degradation has zero to do with available bandwidth. quote:
If you look at the fiber specs for the equipment they used , they are definitely not near running out of bandwidth , for them its as easy as adding another shade and using a newer ont on new subs homes.
Which costs money. They are already in the hole $8000 per sub.
Ha! where did you come up with that number? It's not even close to what the actual cost are. In the beginning it was never that high. Fiber cost of been going down consistently and the cost to run fiber to a home is roughly $750. Nowhere near $8k |
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a333
A hot cup of integrals please
join:2007-06-12
Rego Park, NY
·Cingular Wireless
·Verizon Online DSL
1 edit | reply to Eat Me
Actually, signal degradation indirectly causes a decrease in bandwidth... this is seen in both twisted pair (DSL) and coax (DOCSIS). In twisted pair, as distance decreases, signal degradation drastically increases at higher frequencies, effectively eliminating/attenuating them. And obviously, having your range of available frequencies reduced lowers your equivalent bandwidth by quite a bit, following Shannon's Law. This is kinda the reason DSL suffers on long telephone loops. Add in stuff like load coils/bridge taps and you're in trouble.
In coax, short runs usually don't show much of signal degradation, but on long runs with tons of splitters and old cabling, attenuation/noise can sometimes reduce the available bandwidth noticeably. Not to mention, some of the higher frequencies can also be attenuated, and end up having their energy converted to heat in the coax... this has happened, and was actually a huge issue back when coax was being used in undersea cables (I'm talking way before fiber was even in the labs). They actually had to place inline amps every few miles to get around the effect, but this was a rather expensive solution. |
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submrge
join:2004-10-10
Mine Hill, NJ
| reply to BosstonesOwn
I'd be interested to know (if there are any VZ techs here) what the bandwith is in MHz from the ONT to the STB. I have a feeling it's *similar* to cable - (55 to 870 MHz for the forward signal).
If it is then they have similar issues that the cable co's do with bandwith. |
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a333
A hot cup of integrals please
join:2007-06-12
Rego Park, NY | Obviously, the bandwidth is the same as cables, but as my other post states, this bandwidth is being used to deliver video/data for ONE household, as opposed to serving hundreds of homes at the same time. |
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MichaelWacey
OwlSaver
Premium
join:2005-01-30
Berwyn, PA
 ·Verizon FIOS
·Comcast
| reply to submrge
Cable systems use one Coax to deliver TV, Internet, and Phone service. So, they are all competing for the Coax Bandwidth.
In FiOS, the TV, Internet, and Phone service are all delivered over their own dedicated Fibre wavelength. In the home, Coax is used for TV and MOCA, Cat5/Cat6 is used for Internet, and Cat3 is used for phone. So, there is less contention for bandwidth.
A true comparison would require looking at the details from the Central Office/Head End out to the home. But, it seems to me that FiOS has much more room for growth. For example, I would expect that FiOS will always have more HD content that is at the same level of compression as the source. |
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tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
 ·Hollis Hosting
·Verizon Online DSL
·Fairpoint Communic..
| reply to Eat Me
said by Eat Me :The limitations of coax - so why is the connaction between the ONT and the Actiontec done with MoCA, So they can reuse existing coax rather then run twisted pair. Saves them the cost of installing new customer premise wiring.
said by Eat Me : why is FiOS using cable TV technology to deliver FiOS TV? Quick and dirty backward compatibility with conventional CATV practice. Got them up and running with TV quickly while IPTV matures and they transition FIOS FTTP to GPON.
Was cost effective way to support TV. Verizon uses a third lambda (color) to emulate HFC CATV network. At the ONT optical signal is converted to electrical RF carried over coax.
/tom |
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Eat Me
join:2002-09-25
Sussex, NJ | reply to a333
Modern HFC systems do not have long coax runs and lots of amps.
Cable companies have been gearing up and doing node splits. My node is within walking distance. |
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soothsayer15
join:2002-03-01
Irving, TX
| reply to Eat Me
said by Eat Me : said by BosstonesOwn :
Guess you never heard of this thing called physics and signal degradation ?
Signal degradation has zero to do with available bandwidth. quote:
If you look at the fiber specs for the equipment they used , they are definitely not near running out of bandwidth , for them its as easy as adding another shade and using a newer ont on new subs homes.
Which costs money. They are already in the hole $8000 per sub. Wow. It's apparent that you have not worked in telecommunications. If you did, I feel bad for your employer. |
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AVonGauss
Premium,MVM
join:2007-11-01
Boynton Beach, FL | reply to Eat Me
$8000 per sub? |
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patcat88
join:2002-04-05
Jamaica, NY
| reply to BosstonesOwn
said by BosstonesOwn :If you look at the fiber specs for the equipment they used , they are definitely not near running out of bandwidth , for them its as easy as adding another shade and using a newer ont on new subs homes. Which the equipment doesn't exist for. WDM PON is a proposal some people are throwing around the industry, ITU doesn't even recognize it, let along debated making a committee for its standard. |
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PapaMidnight
join:2009-01-13
Baltimore, MD
| reply to Eat Me
said by Eat Me : said by BosstonesOwn :
Guess you never heard of this thing called physics and signal degradation ?
Signal degradation has zero to do with available bandwidth. Except for the funny fact that it does. In order to compensate for Signal Degradation, one needs to increase the signal strength. What is the cost in doing so? More bandwidth usage.
Think. |
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iansltx
join:2007-02-19
Golden, CO | reply to submrge
Pretty sure it's an 860MHz equivalent. Not 1GHz but you don't need that 140 MHz since it'd be for data and that's on anoher wavelength anyhow. |
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iansltx
join:2007-02-19
Golden, CO | reply to patcat88
VZ runs phone on one wavelength, video on another, internet on another... |
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patcat88
join:2002-04-05
Jamaica, NY
| said by iansltx :VZ runs phone on one wavelength, video on another, internet on another... Thats irrelevant. It was designed that way for equipment simplification at the Central Office, not for higher speeds. Phone is only 64kbit ISDN over fiber for example.
How about WDM internet which would be the real purpose of WDM in the first place, since its impossible to overload the TV or Phone portions at the moment. |
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iansltx
join:2007-02-19
Golden, CO | WDM internet would be nice, but there's no need atm. Even the new DOCSIS 3 packages can't compete with 50/20 FiOS and Verizon knows that. |
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JPL
Premium
join:2007-04-04
West Chester, PA
·Verizon FIOS
| reply to iansltx
said by iansltx :Pretty sure it's an 860MHz equivalent. Not 1GHz but you don't need that 140 MHz since it'd be for data and that's on anoher wavelength anyhow. That's correct - it runs ~870MHz for TV service. But there's a difference between FiOS and traditional cable on this front. First, most cable services run well below 870MHz. Second, Verizon uses all 870MHz for linear TV feeds. All other associated feeds (guide data, VOD, widgets) all come in via the IP feed, which is separate from the TV feed. As a result of that layout (and the fact that they don't have any analog service), FiOS runs with 135 QAM channels. That's what gives them the room to carry all their channels with no additional compression. |
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