how-to block ads
|
|
Share Topic
 |
 |
|
|
iansltx
join:2007-02-19
Golden, CO
kudos:2 Reviews:
 ·Comcast
| reply to fifty nine
Re: What else is new, but just for the Present! 480 Mbit/s? Nope.
BPON: 622 Mbps down, 155 Mbps up
GPON: 2.488 Gbps down, 1.244 Gbps up
10GPON: ~10 Gbps down, ~2.5 Gbps up
Shared between at most 32 (BPON) or 64 (GPON) customers
DOCSIS 3: Nx38 Mbps down, Nx30 Mbps up, N=4 for downloads and 1 for uploads right now, though it'll eventually be 8 for downloads and 4 for uploads.
Shared between 125-1000 subscribers (I think Comcast is around 250, Cablevision is in the 60s, Suddenlink is in the 100-200 range for their upgraded infrastructure, significantly more for their older stuff)...
Whether Verizon is actually using their GPON architecture to its fullest capacity is a whole other deal (they aren't) but you're drastically underestimating the capacity of the current fiber architectures out there. | | |
|
| So in other words I actually overestimated the bandwidth per home.
2.4Gbit/s divided by 32 homes is 75Mbps per home.
And before you go telling me that it can be upgraded to XGPON or 10GPON, I know this. And this was my point - what's there now for any provider isn't set in stone. And since Cable's core network is fiber they are well poised to upgrade when the need arises. | |
iansltx
join:2007-02-19
Golden, CO
kudos:2 Reviews:
·Comcast
| Well, using your methods the current 4x1 bonding with 125 homes per node (conservative) nets you 1.216 Mbps per customer down, 240 kbps per customer up. Apple to apples, kthxbai.
Also, not all providers use PON. Active Ethernet systems are at 100 Mbps or 1 Gbps now. PON systems have more capacity overall but active has more non-blocking capacity, which is the game you want to play.
Oh, and for kicks, let's factor in cable not having 64QAM uploads in many areas (basically most non-Comcast territory). The result: 80 kbps of upload capacity per customer non-blocking in those areas (10 Mbps of upload capacity over 125 homes). | |
|
