nanog mailing list archives
Re: GPON Optical Levels
From: Florian Lohoff <f () zz de>
Date: Tue, 13 Oct 2015 15:06:53 +0200
On Mon, Oct 12, 2015 at 10:46:59PM +0200, Baldur Norddahl wrote:
Here is a small secret: If you attenuate the PON port so the signal level at the OLT is as low as possible, your network will be more robust against people connecting P2P fiber media converters to your network. This is because these devices typically have TX power that is significantly less than your ONUs. By attenuate the signal you can bring the rogue signal below the detection threshold of the OLT. In my experience one way to do this is to always use 1:128 splits. Even if you are only going to connect less than 32 ONUs, you will find that 1:128 can be more robust. In fact I discovered this little trick after we started using 1:128 splits (for flexibility, not because we actually connect that many clients). Because the fiber plant is shared with other service
Wouldnt a 1:32 splitter + a 9dB attenuation be the same? From the price/performance the 1:128 splitter should be much more expensive. We have seen happening the same converting a former p2p footprint to GPON and somebody got a left over p2p device connected. But this was a single incident so far. Flo -- Florian Lohoff f () zz de We need to self-defend - GnuPG/PGP enable your email today!
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Current thread:
- GPON Optical Levels Colton Conor (Oct 12)
- Re: GPON Optical Levels Colton Conor (Oct 12)
- RE: GPON Optical Levels Jameson, Daniel (Oct 12)
- Re: GPON Optical Levels Baldur Norddahl (Oct 12)
- Re: GPON Optical Levels Florian Lohoff (Oct 13)
- RE: GPON Optical Levels Jameson, Daniel (Oct 12)
- Re: GPON Optical Levels Colton Conor (Oct 12)