Since ADSL2+ upgrade router keeps resyncing

[jac_95]

My next door neighbour has the same problem as me (BT Forum Here). They are on a slightly lower line Line attenuation of 63 (4.6km) (mines about 66-68). They have been upgraded to BT's 21cn network but have been kept on adslmax. 

Here's Their router stats

cat /proc/avalanche/avsar_modem_stats

AR7 DSL Modem Statistics:
--------------------------------
[DSL Modem Stats]
US Connection Rate: 448 DS Connection Rate: 1472
DS Line Attenuation: 63 DS Margin: 6
US Line Attenuation: 31 US Margin: 11
US Payload : 12552288 DS Payload: 94134960
US Superframe Cnt : 693725 DS Superframe Cnt: 693725
US Transmit Power : 0 DS Transmit Power: 0
LOS errors: 0 SEF errors: 0
Errored Seconds: 0 Severely Err Secs: 0
Frame mode: 3 Max Frame mode: 0
Trained Path: 1 US Peak Cell Rate: 1056
Trained Mode: 3 Selected Mode: 1
ATUC Vendor Code: 4946544E ATUC Revision: 1
Hybrid Selected: 3 Trellis: 1
Showtime Count: 2 DS Max Attainable Bit Rate: 1472 kbps
BitSwap: 1 US Max Attainable Bit Rate: n/a
Annex: AnxA psd_mask_qualifier: 0x0000
Power Management Status: L0 DS HLINSC: 0
US ACTPSD: -345 DS ACTPSD: -358
Total init. errors: 3 Total init. timeouts: 0
Showtime init. errors: 0 Showtime init. timeouts: 0
Last showtime init. errors: 2 Last showtime init. timeouts: 0
ATUC ghsVid: b5 00 49 46 54 4e 71 be
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00
ATUR ghsVid: b5 00 54 53 54 43 00 00
T1413Vid: 00 00 T1413Rev: 00 VendorRev: 00

[Upstream (TX) Interleave path]
CRC: 70 FEC: 17068 NCD: 0
LCD: 0 HEC: 68

[Downstream (RX) Interleave path]
CRC: 44090 FEC: 4371074 NCD: 0
LCD: 0 HEC: 0

[Upstream (TX) Fast path]
CRC: 0 FEC: 0 NCD: 1
LCD: 0 HEC: 0

[Downstream (RX) Fast path]
CRC: 0 FEC: 0 NCD: 0
LCD: 0 HEC: 0

[ATM Stats]
[Upstream/TX]
Good Cell Cnt: 261506
Idle Cell Cnt: 12199365

Tx Packets Dropped Count: 0
Tx Bad Packets Count: 8

[Downstream/RX)]
Good Cell Cnt: 1961145
Idle Cell Cnt: 38928231
Bad Hec Cell Cnt: 53451
Overflow Dropped Cell Cnt: 0
Rx Packets Dropped Count: 0
Rx Bad Packets Count: 0

[SAR AAL5 Stats]
Tx PDU's: 76562
Rx PDU's: 100691
Tx Total Bytes: 12562053
Rx Total Bytes: 112490261
Tx Total Error Counts: 0
Rx Total Error Counts: 1123

[OAM Stats]
Near End F5 Loop Back Count: 0
Near End F4 Loop Back Count: 0
Far End F5 Loop Back Count: 0
Far End F4 Loop Back Count: 0
SAR OAM Ping Response Drop Count=0

The problem is that it has been constantly been resyncing and I have noticed that the noise margin sometimes goes down to 0. 

I have requested a full BT line test and line & profile reset which was done by BT Care (thankyou). The PSTN check passed but due to the constant resyncing the broadband line / profile reset could not be done.

Things I have checked:

1) Checked main socket (they have adsl v.1 mainsocket with two sockets [1 for phone & 1 for broadband])

2) Updated netgear DG834v3 firmware

3) Tried my Belkin N1 router (made no difference, in fact sync rate went down slightly, then back up when netgear was reconnected)

4) They have powerplugs that deliver the broadband downstairs but don't think they are causing the drop outs.

I was asked by BT if they had a BT router, they don't or have lost it as they recieved it 10 years ago (presumably a voyager or earlier router)

Does anyone know what's causing these dropouts?

Cheers,

James

[john46]

how long have they been upgraded to 21cn

[jac_95]

On the 23 May thay were upgraded.

[john46]

Ok it looks like noise issues have you tried the quiet line test ?

[jac_95]

I brought over our old BT Decor 400 corded phone and did 17070 opt 2. There was a slight hiss/ hum in the background. But could be the phone.
They have a BT ADSL main socket so it wouldn't be internal wiring ?

Cheers,
James

[john46]

it could be a faulty face plate there have been some recent posts about this also testing from the test socket eliminate any possible faults because if an engineer is called out he will go to the test socket and if no fault found it would be chargeable

[imjolly]

I used to have a similar problem when I upgraded and it was the ppoA that dropped but connected immediately at same speed and noise margin - does your do the same?

[jac_95]

Thank you john46 and imjolly.

So it could be the main socket or something to do with the ppoA. 

I will be going back next door to do some more checks. I will try the quiet line test in the test socket and see if there is any difference.

Next door have a netgear router, if it was the ppoA would a BT router solve it?

They rang BT many times saying it had dropped connect and the BT call centre mentioned a router reset, which seemed to do the job. Thing is that it keeps resyncing and dropping out.

BT Care are ringing me back tomorrow to see what else can be done.

Cheers,

James

[imjolly]

it was a netgear I was and still am using but I don't think it matters which router it just seemed to be dropping pppoA every day or so but the connection speed always returned at the same figure.  lasted a few weeks and then just stopped

[john46]

i have had the same happen with a home hub lasted a few weeks then stopped