Strange Sync

Something strange is happening on my line

i usually sync between 4600 and 4800, give a throughput a 4mb my noise margin is usually 9.

these are my stats now, i have had this sync for the last 30hrs or so i have done a couple of re syncs ( first login to router and disconnect session) , and it stays at the figure below

3808 kbps 448 kbps
Line Attenuation 40.0 db 21.0 db
Noise Margin 6.4 db 19.0 db

so my sb is near 6 and my sync as gone down if anything this should have gone up.

spoke to my ISP they say the checks come back fine, what could the problem be? many thanks

You should be synching at anything between around 6Meg on ADSL to somewhere short of 9Meg on ADSL2+. Who is your ISP and what service are you on?

Have you got a set of stats when using the master test socket, the ISP should have asked you to do this.

hi there

i have the one socket and always plugged into the test socket.

my isp says there is nothing the can do as my fault threshold is 2.5mb

many thanks

ISP is within its rights to say that, as this is just a slow connection rather than a fault.

Stats from actual next door connection would be interesting, as would help to assess whether its an issue with your line or a neighbourhood wide noise issue.

In reply to a post by Anonymous:

always plugged into the test socket.

Do you mean you have the faceplate removed permanently? Or are you confusing test socket with external socket of master?

have the faceplate removed from tthe master socket permanently

just to add my isp did an snr reset according to there system. the strange thing is my router never re synced with the exchange, i still have an uptime before the time the snr reset was done

Because they have to force a resync at the time of reseting noise margin.

Also a noise margin reset will do nothing as you appear to be on the default 6dB anyway

Edited by MrSaffron (Tue 31-Jul-12 08:56:21)

the router never resynced though

if i keep my router connect without trying any re syncs over the next 5 days, is thererap a chance the sync will pick up

Nope

Name and shame the ISP..... Then look for a new provider!

what can i do to try and get my sync back to were it was at about 4600, 4700, my isp can offer no explain as to why i have lost nearly 1 meg in sync, especially when they noise margin as gone down to 6 ?

can anyone shed any more light as to why this has happened? , , many thanks

my isp says i am still with my acceptable fault thresh hold, so i would only probably get the same response from i new isp , how would moving isp help? , many thanks

A few have asked you for the ISP. It can do you no harm to say who it is.

Without that, no-one can help any further. It could be an ISP known to be hopeless, it could be one where someone can kick butt. But until you say, that's the end of it.

There are some ISPs that are very good at getting this sort of thing sorted.

3808kbps rings a bell with me - I might try and find out what it reminds me of later. Some sort of cap.

not a problem my ISP is the post office.

when i have spoken to the they have done all the checks and say my line is fine they did say there was 5 error on the upstream, which they said was nothing to worry about and 0 on downstream

they say the can not raise a fault when the checks come back clear and i am on/above fault threshold of 2.5mb , many thanks for everyone time and effort

here are my current line ststs

i see the sync as dropped


# adslctl info --stats
adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 0
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 3232 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Interleave
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 9.1 20.0
Attn(dB): 40.0 21.0
Pwr(dBm): 19.3 12.1
Max(Kbps): 3488 1012
Rate (Kbps): 3232 448
G.dmt framing
K: 102(0) 15
R: 14 4
S: 2 4
D: 16 8
ADSL2 framing
MSGc: 1 1
B: 102 15
M: 2 4
T: 1 1
R: 14 4
S: 2.1359 4.2500
L: 824 128
D: 16 8
Counters
SF: 310221 310220
SFErr: 0 0
RS: 10547526 5271734
RSCorr: 444 0
RSUnCorr: 0 0

HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 40200218 0
Data Cells: 726620 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 0
SES: 0 0
UAS: 14 0
AS: 5274

INP: 1.08 1.00
PER: 1.86 1.85
delay: 8.54 8.50
OR: 29.96 30.11

Bitswap: 0 0

Total time = 1 hours 28 min 18 sec
SF = 310221
CRC = 0
LOS = 0
LOF = 0
ES = 0
Latest 1 day time = 1 hours 28 min 18 sec
SF = 310221
CRC = 0
LOS = 0
LOF = 0
ES = 0
Latest 15 minutes time = 13 min 18 sec
SF = 46905
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 15 minutes time = 15 min 0 sec
SF = 52982
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 52923
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 52982
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 52864
CRC = 0
LOS = 0
LOF = 0
ES = 0
Showtime Drop Reason: 0
Last Retrain Reason: 0
#
#

The issue that is making your line under perform in the first place has probably just got worse over time.

A better ISP might arrange a SFI visit under the proviso that if the issue is found to be in your realm of responsibility you would get charged for it.

my isp has now raised this to openreach, and say some will will contact my with 48hrs with a view to booking an engineer