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Author Topic: Outgoing FEC upstream errors, how or why..?  (Read 1065 times)

snadge

  • Kitizen
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  • Posts: 1450
Outgoing FEC upstream errors, how or why..?
« on: February 02, 2019, 04:33:35 PM »

It is my understanding on xDSL that data is RS encoded and is applied (along with Interleaving) on the downstream, it is then received, deinterleaved, and any data that needs correcting is corrected, data that can not be corrected (CRC). is requested for a re-transmit...  now in the reverse, why do we see upstream FEC errors when the data is outgoing and would only typically have errors at the receiving end?

thanks in advance
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Aquiss - 900/110/16ms - TP-Link AR73

licquorice

  • Reg Member
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  • Posts: 977
Re: Outgoing FEC upstream errors, how or why..?
« Reply #1 on: February 02, 2019, 04:41:32 PM »

It is the DSLAM that is seeing the errors and reporting back to the CPE in the same way that CPE received errors are reported back to the DSLAM.
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snadge

  • Kitizen
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  • Posts: 1450
Re: Outgoing FEC upstream errors, how or why..?
« Reply #2 on: February 02, 2019, 04:43:22 PM »

It is the DSLAM that is seeing the errors and reporting back to the CPE in the same way that CPE received errors are reported back to the DSLAM.

ahh i see, thanks for that :)
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Aquiss - 900/110/16ms - TP-Link AR73
 

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