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Unstable connection

dragona
Grafter
Posts: 207
Registered: 31-07-2007

Unstable connection

Hi all,
Ive posted several times as of late trying to get to the bottom of my internet issues which occur on sevral PC's, Problems are:
Dropping from on demand services, Games, Live Voice chat, Live Video chats/streams, (distortion, freezing and disconenctions)
temporary loss of internet (a few seconds to 30/40 seconds) with no disconect,
Actual disconnections occur usually once per day or 2 days, seem to have more issues when it is raining/damp outside (we had some nice weather recently where i had no issues and held sync quite well),
SNRM varies by up to 8 db dependent on time of day last sync occurred.(im on a 6db profile)

Tried several things as follows:
Replaced:
Router
Cabling
Filters
Attempted:
Different Wifi Adapters
Plugging into master socket
running wireshark captures(TCP DUP ACK, TCP out-of-order are typical problems found at same time)
Locating any possible noise
Quiet Line Test using master socket and no fiulters (seems quiet?)
New router shows more detailed information about connection, here are a few snippets from today:

Snippet from 2 hours 6 mins after re-sync

Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 302409308
Lan Rx : 252963469
ADSL Tx : 883330
ADSL Rx : 1096955
CRC Down : 0
CRC Up : 11500
FEC Down : 0
FEC Up : 39169
HEC Down : 13851
HEC Up : 0
SNR Up : 5.8
SNR Down : 6.1
Line Attenuation Up : 23.9
Line Attenuation Down : 46.0
Data Rate Up : 1035
Data Rate Down : 6198
2 hrs 26mins

Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 302545498
Lan Rx : 253091680
ADSL Tx : 1007554
ADSL Rx : 1231375
CRC Down : 0
CRC Up : 14991
FEC Down : 0
FEC Up : 43280
HEC Down : 19652
HEC Up : 0
SNR Up : 5.9
SNR Down : 6.0
Line Attenuation Up : 23.9
Line Attenuation Down : 46.0
Data Rate Up : 1035
Data Rate Down : 6198
2hrs 40 mins:
Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 302647715
Lan Rx : 253182972
ADSL Tx : 1097089
ADSL Rx : 1332332
CRC Down : 0
CRC Up : 19365
FEC Down : 0
FEC Up : 8324
HEC Down : 29688
HEC Up : 0
SNR Up : 5.9
SNR Down : 6.1
Line Attenuation Up : 23.9
Line Attenuation Down : 46.0
Data Rate Up : 1035
Data Rate Down : 6198
HEC's going up quite quick and issues were very apparent during this small period. I'm under the impression HEC's are the bad errors you don't want to see as they are uncorrectable i can only assume i have a line fault though before reporting can anyone think of anything else to try?
Any advice welcome
-D
3 REPLIES
Community Gaffer
Community Gaffer
Posts: 17,664
Thanks: 656
Fixes: 162
Registered: 05-04-2007

Re: Unstable connection

Quote
Dropping from on demand services, Games, Live Voice chat, Live Video chats/streams, (distortion, freezing and disconenctions)
temporary loss of internet (a few seconds to 30/40 seconds) with no disconect,

Quote
Attempted:
Different Wifi Adapters

Have you tried not using wireless just to see if you get the same issues?
If this post resolved your issue please click the 'This fixed my problem' button
 Chris Parr
 Plusnet Staff
dragona
Grafter
Posts: 207
Registered: 31-07-2007

Re: Unstable connection

Had same issue last night over wifi, tried using ping results using a NAS(over cat5) while getting some cable from up stairs for the laptop.
Ping results on the NAS showed 25% packet loss but router re synced automatically before i could see if the problem was identical over cable.
I'll keep the cable nearby now so i can see if i get identical issues over cat5 when it begins to occur again though its pretty calm and dry weather wise at the moment which  seems to be when its more stable.
-D
dragona
Grafter
Posts: 207
Registered: 31-07-2007

Re: Unstable connection

High winds again today, perfect time to test and it has the same problem over cat5 as it does wifi,

Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 8735473
Lan Rx : 7052805
ADSL Tx : 6623368
ADSL Rx : 8652228
CRC Down : 0
CRC Up : 40154
FEC Down : 0
FEC Up : 2418
HEC Down : 62583
HEC Up : 0
SNR Up : 6.3
SNR Down : 6.0
Line Attenuation Up : 23.9
Line Attenuation Down : 46.0
Data Rate Up : 1075
Data Rate Down : 7447

SNRM seems healthy at the moment too,  
I tried my LAN connection with default values at first, then with a few changed values which have caused issues with games etc in the past for me both had the problems described in first post.
-D
Edit:
Connection dropped at 11:15, SNRM showed 6.3 and has now re synced at a higher rate
Modulation : ADSL2+
Annex Mode : Annex A/L
Line State : up
Lan Tx : 9574597
Lan Rx : 7471255
ADSL Tx : 6309
ADSL Rx : 9593
CRC Down : 0
CRC Up : 2647
FEC Down : 0
FEC Up : 39717
HEC Down : 32075
HEC Up : 00
SNR Up : 6.4
SNR Down : 6.2
Line Attenuation Up : 23.9
Line Attenuation Down : 46.0
Data Rate Up : 1048
Data Rate Down : 8067

This means when peak time hits i will be forced to disconnect and reconnect to have any hope of doing things tonight.