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As I recall, originally the GPON spec had a 12.5 mile limit due to timing, not due to signal strength.
If you launch at -0 dBm and need –24 dBm that is a 24 dB margin.
32:1 splitters have 16 dB loss. That leaves you with 8 dB for cable, connector and splice loss.
.5 dB per km for 1310, that gives you 16 kM or 10 miles. I may be off on a few numbers here, but as I recall it worked out to take 32 out the full 12.5 miles without running out of light irrespective of where you placed the splitters.
From: Adam Moffett
Sent: Monday, February 12, 2018 9:38 AM
To: [email protected]
Subject: Re: [AFMUG] Outdoor PON OLT
Maybe I need to review the math.
I was figuring on several small splitters along the route. I didn't compare to a 1x32 in the cabinet because I figured if I brought every fiber back to the cabinet then I didn't save anything versus ethernet.
------ Original Message ------
From: "Mark - Myakka Technologies" <[email protected]>
To: "Adam Moffett" <[email protected]>
Sent: 2/12/2018 11:30:46 AM
Subject: Re: [AFMUG] Outdoor PON OLT
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Adam,
How far are you going? We are pushing almost 20 miles on a 1x32 split. Are you using one 1x32 or multiple smaller splitters?
--
Best regards,
Mark mailto:[email protected]
Myakka Technologies, Inc.
www.MyakkaTech.com
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Sunday, February 11, 2018, 10:24:30 PM, you wrote:
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I'm looking at rural areas (like a few houses per mile). As I'm looking at hypothetical power budgets for PON, I'm finding that if I run the line down the road and put splitters on the pole I can split 5-6 times and then I'm getting too low on db to keep going down the road. At 5 or so houses per port, a 1U, 8 port ONT is no denser than a 1U switch.
Your stated reasons for PON are all correct. The numbers just aren't seeming to work out for me.
I also figure if I install enough fibers for AE, I can still switch to PON some day if I want to.
We would never max out the PON port, but looking back on the past 15 years of growth in consumption I wonder if I should ever say "never". In AE I can put 100Gig in every house if I have to. I'll "never" have to do that as far as I can imagine, but my imagination could be limited.
-Adam
------ Original Message ------
From: "Josh Reynolds" <[email protected]>
To: [email protected]
Sent: 2/11/2018 9:28:34 PM
Subject: Re: [AFMUG] Outdoor PON OLT
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A few reasons...
Port cost is still fairly high.
More splicing.
More fiber required.
Larger chassis required.
More power required.
More battery backup required.
Consumers not even close to using up 1-2 generations back of PON capacity in most places.
On Sun, Feb 11, 2018 at 7:53 PM, Chuck McCown <[email protected]> wrote:
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So, why do PON and not active in these super cheap optics days?
From: Chuck Hogg
Sent: Sunday, February 11, 2018 6:10 PM
To: [email protected]
Subject: Re: [AFMUG] Outdoor PON OLT
We are walking away from them and Alphion...I think Mark's product with Zhone is different.
Regards,
Chuck
On Sun, Feb 11, 2018 at 2:29 PM, Mike Hammett <[email protected]> wrote:
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