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Aspiring Expert
Posts: 208
Registered: ‎03-11-2010
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Question re HEC errors.

Just been on the phone with India.  Told them that I have got 535/724 HEC errors for a connection time of 2hrs 10mins.  On ADSL2, HH3.  When I was on ADSL1 HH2 typeA I never got more than 5 HEC errors and they soon went after a few days.  Got told that nobody ever has zero HEC errors and that he did not believe it, I told him that if he wanted me to I could send him copies of the print outs.  Next thinkg he says, " I'll have check on this and get back to you tomorrow evening."  He also said that HEC errors were not anything to worry about.  Yet All 36 engineer's that have been here have said that there should be no HEC errors.


On this subject, had two engineer's here today.  Just before they did their tests, I did a print out from the HH manager page and it showed 466/811 HEC errors, but when they did their test they showed me that they could not see them.  They did say that they thought it could be a result of that they did not connect to the same server as I do.  That there could be a problem with the BT retail server.


Could someone here please let me know, if what I have seen in the past from the HH manager page was a figmant of my imagination or did I actually see it.   What should the HEC errors reading be.


For the purists here:


ADSL Line Status
Connection Information
Line state:Connected
Connection time:0 days, 02:17:30
Downstream:2.404 Mbps
Upstream:880.8 Kbps
ADSL Settings
Modulation:G.992.5 Annex A
Latency type:Interleaved
Noise margin (Down/Up):5.2 dB / 4.9 dB
Line attenuation (Down/Up):56.1 dB / 35.2 dB
Output power (Down/Up):16.8 dBm / 12.4 dBm
FEC Events (Down/Up):85935 / 0
CRC Events (Down/Up):106 / 436
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):588 / 724
Error Seconds (Local/Remote):78 / 258

Recognised Expert
Posts: 1,118
Registered: ‎13-02-2010
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Re: Question re HEC errors.

[ Edited ]

Hi Diean,


In general, HEC errors are nothing to worry about.


As for there being zero HEC errors on lines, I don't have any:


Counters (Down,  Up)


SF:16478227, 16478332

SFErr(CRCErr):1, 0

RS:0, 0

RSCorr:0, 0

RSUnCorr:0, 0
HEC:0, 0

OCD:0, 0

LCD:0, 0

Total Cells:10750698960

Data Cells:1047385360

Drop Cells:0

Bit Errors:0, 0




Connection Time77:51:31


Errors are completely dependant on lines (Not all are the same).


With 588 in 2 hours and 17 minutes, I wouldn't worry.


HEC Errors are: Header Error Control errors (See: )


I hope this helps


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