Kitz Forum

Broadband Related => Broadband Technology => Topic started by: snadge on February 02, 2019, 04:33:35 PM

Title: Outgoing FEC upstream errors, how or why..?
Post by: snadge 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

Title: Re: Outgoing FEC upstream errors, how or why..?
Post by: licquorice 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.

Title: Re: Outgoing FEC upstream errors, how or why..?
Post by: snadge on February 02, 2019, 04:43:22 PM

Quote from: licquorice 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.

ahh i see, thanks for that :)