FEC errors ?

i used to be syncing at 7648 with an ip profile of 6500 and snr of 6.

for weeks my internet has felt unresponsive and slow at times , (but on speed test always getting just over 6mb), have had an BT OR engineer out, and he says the reason for this , is i am getting 100s of FEC errors a second, was showing on his equipment when he tested at the cabinet and just outside my property.

He was he nearly 8 hours but everything he checked was fine, he think the FEC errors is been caused by REIN, in the mean time he has had my snr set at 9 , sync at 5984 with ip profile of 5000 , with only a couple of FEC errors a second.

At the moment everything seems more quicker , and more responsive, will this be due to the above ?

Is it likely the FEC errors are been caused by REIN ?

Edited by deleted (Sun 12-Apr-15 19:24:34)

Is it likely the FEC errors are been caused by REIN ?

Not always, but if he spent 8 hours on site, and he was still seeing them, there is a fair chance. Did the engineer get a REIN case raised ? Are any of your immediate neighbours having similar issues ?

If it were REIN, I'd be dubious that having the target snd hard pinned at 9db would really be masking the issue so well.

Are you are to post stats from your router ?

You have interleaving on your line? Its common to see FEC errors on a line with interleaving turned on anyway

My neighbours don't seem to be having an issue

I have a REIN engineer coming later in the week

i have interleaving on my line

here are current stats, many thanks

Uptime: 2 days, 16:17:31

DSL Type: ITU-T G.992.1

Bandwidth (Up/Down) [kbps/kbps]: 448 / 5.984

Data Transferred (Sent/Received) [GB/GB]: 0,98 / 1,99

Output Power (Up/Down) [dBm]: 12,3 / 19,9

Line Attenuation (Up/Down) [dB]: 22,5 / 37,5

SN Margin (Up/Down) [dB]: 26,0 / 9,6

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / TSTC

Loss of Framing (Local/Remote): 64 / -

Loss of Signal (Local/Remote): 10 / -

Loss of Power (Local/Remote): 0 / -

Loss of Link (Remote): -

Error Seconds (Local/Remote): 1.647 / -

FEC Errors (Up/Down): 1 / 118.272

CRC Errors (Up/Down): 0 / 44

HEC Errors (Up/Down): - / 44 / 382

FEC errors should be expected when interleaving is enabled but too many can be detrimental to performance.

Before the engineer came, was the performance degraded all of the time or only at specific times of the day? If so what times?

The latter is usually a sign of REIN (Although in rare cases it can be continuous) whereas the former can be a sign of a faulty connection somewhere.

There's a useful article on REIN (and how to detect it) here. All you need to detect REIN interference generated in the home is an AM radio tuned to 612kHz.

All you need to detect REIN interference generated in the home is an AM radio tuned to 612kHz.

Yes, but lots of things make an audible noise on a radio and yet are not causing any interference.

Well, I'm going to give it a shot. It may be the cat. You never know.

Then cut its whiskers off.