 espaethDigital PlumberPremium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2
 ·Clear Wireless
| reply to iansltx
Re: Sandvine says Docsis 3 won't end need for traffic mgt said by iansltx:Funny how there's no mention of GPON in their bandwidth apocalypse. Why? Well, when you're dividing up 2.488 Gbps of capacity among 32 (at most) users you can run everyone at full throttle with no ill effects. That's the capacity of the access technology, not overall network capacity.
Verizon isn't budgeting 2.5gbps of distribution capacity for every single FiOS segment.
The problem is solvable with money, and for cheaper than upgrading the edge again. That's the whole point in $18 billion infrastructure upgrade projects -- you want to get as much run time out of them as possible. |
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iansltx
join:2007-02-19
Golden, CO
kudos:2 Reviews:
 ·Comcast
| That's true, however once you've upgraded the edge to PON, you simply drop in faster electronics and you have 10G-PON and beyond. On the backbone side, again all you need is electronics to get where you need to be. 100 Gbit WDM tech (per strand) should be along soonish, so the backbone won't be congested either. |
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espaethDigital PlumberPremium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2 Reviews:
·Clear Wireless
| said by iansltx:That's true, however once you've upgraded the edge to PON, you simply drop in faster electronics and you have 10G-PON and beyond. Sort of.
GPON to 10G-PON usually requires recharacterization and signal remediation because the allowable signal tolerances are different. The downstream is also shared across all of the ONTs on the segment, so to upgrade to 10GPON you either need to upgrade all the ONTs at the same time or break the 10G signal out into a different lambda and upgrade specific ONTs to using the new wavelength.
At a high level you're absolutely correct, but when you actually start working down into the details of implementation the required tasks make it cost a lot more than it would appear on the surface.
said by iansltx:On the backbone side, again all you need is electronics to get where you need to be. 100 Gbit WDM tech (per strand) should be along soonish, so the backbone won't be congested either. 100GigE Ethernet isn't due for ratification until sometime around Q2 2010, so I wouldn't expect to see product being widely available for that until probably around 2011. You also have to keep in mind that the major carriers have massive investments in existing WDM solutions that may not be 100G capable. (ie, there's still an insanely large deployment of Nortel Optera 5xxx hardware amongst carriers) |
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