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New Member
Posts: 34
Registered: ‎02-01-2014
Kudos: 3

Reported signal on ONU vs OLT

Is the signal reported in the OLT and in UNMS the signal received at the OLT from the ONU, or is it the signal received on the ONU and reported back to the OLT?

 

Thanks,

Joe

Regular Member
Posts: 683
Registered: ‎12-12-2015
Kudos: 184
Solutions: 9

Re: Reported signal on ONU vs OLT

It is sent from the ONU to the OLT (as part of G.984/DBRU).  It's the OLT that reports this data to UNMS.

New Member
Posts: 34
Registered: ‎02-01-2014
Kudos: 3

Re: Reported signal on ONU vs OLT

Okay, so the only signal that is ever reported anywhere (on the ONU, in the OLT, and in UNMS) is all the same signal, which is the signal received at the ONU, correct?
Regular Member
Posts: 683
Registered: ‎12-12-2015
Kudos: 184
Solutions: 9

Re: Reported signal on ONU vs OLT

Correct.  When talking about GPON it's common only to mention the 1310nm upstream signal strength.

It's the signal coming out of the OLT and it's the one you might measure with your OPM.

 

The 1490nm downstream signal is the one coming out of your ONU.  It's much harder to measure with your OPM as most ONU's don't spit out signal unless they also receive.  In normal daily operatrions nobody checks the downstream signal strength.

New Member
Posts: 34
Registered: ‎02-01-2014
Kudos: 3

Re: Reported signal on ONU vs OLT

That's what I needed to know! Thanks for explaining it!
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