Re: [AFMUG] GPONStandards based GPON will only allow you to go 20 km and at a 32:1 split and normal cable you have plenty of light at that distance.
From: Mark - Myakka Technologies Sent: Thursday, March 30, 2017 9:13 PM To: Adam Moffett Subject: Re: [AFMUG] GPON Adam, Actually, you can go out further that 20km. I have customers out as far as 29km. There are two factors to take into consideration. 1. Optical budget. Very simple math just like the wireless world. Start with TX subtract splitter loss, distance loss, and connector loss. If greater than RX value, you are good to go. We usually try for a 3-4 db margin or paper to give us some wiggle room. 2. The donut, as Donny calls it. The maximum distance between two ONT's on one OLT port is 20km. Zhone has a parameter on each olt port that I can set min and max distance. I have most OLT ports set at 0km-20km which is the default. I have a few at 10km-30km for longer reach. -- Best regards, Mark mailto:[email protected] Myakka Technologies, Inc. www.MyakkaTech.com Proud Sponsor of the Myakka City Relay For Life http://www.RelayForLife.org/MyakkaCityFL Please Donate at Please Donate at http://www.myakkatech.com/RFL.html ------ Thursday, March 30, 2017, 10:05:26 PM, you wrote: There's a link budget calculation. I found some online calculators, but to be honest I didn't actually understand all the variables. Rather than barf it up, I signed up for a class. $195 http://fisuniversity.com/courses-fiber-to-the-x.html One rule of thumb I saw was you could go 20km on a 32:1 PON...but it's not actually that simple. ------ Original Message ------ From: "Jason McKemie" <[email protected]> To: "[email protected]" <[email protected]> Sent: 3/30/2017 10:01:33 PM Subject: [AFMUG] GPON How do you go about calculating the maximum distance for a GPON system? Is it the total distance of all the fiber on a given PON? -Jason
