Adsl max

[glen]

Is it possible to revert back to adsl max, because my speeds have more than halved since i've been on adsl2+. I don't think it should be a problem though.

[PuncH]

Is it possible to revert back to adsl max, because my speeds have more than halved since i've been on adsl2+. I don't think it should be a problem though.

Should be fine. Before I switched to ADSL2+ support told me I could move back to ADSL Max if it all went wrong.

[Simon]

It is possible, but I think I read somewhere that it takes five working days to revert back.  Have a word with support, and they will guide you. 

[Sebby]

That sounds about right, Simon, given that there is some physical work to do.

[glen]

Just wondering if I should leave it in case it does improve, but I can't see it. A few websites are reporting the max speed my line can attain is 3 mbps.

[glen]

Called Idnet at about 4oclock and asked to be regraded to adsl max again, and they said 5 working days, so no problem, just checked my speed again and its now downloading at about 5mbps, so roughly a 2 meg jump. Surely the regrade can't be going through already? Dont know whats going on here but it seems strange as soon as I ask for a regrade my speed goes back up again. Any ideas anyone ?

[quandam]

I would have given it ADSL2+ a little longer to settle. Your speed check showing 5mbps proves that you are capable of achieving higher speeds than 3mbps. Sometimes my line is showing , on tests, a max speed achievable of 5 Mb but I get around 7Mb most of the  time 

[Sebby]

Called Idnet at about 4oclock and asked to be regraded to adsl max again, and they said 5 working days, so no problem, just checked my speed again and its now downloading at about 5mbps, so roughly a 2 meg jump. Surely the regrade can't be going through already? Dont know whats going on here but it seems strange as soon as I ask for a regrade my speed goes back up again. Any ideas anyone ?

Post your stats and we might be able to tell you.

I would have given it ADSL2+ a little longer to settle. Your speed check showing 5mbps proves that you are capable of achieving higher speeds than 3mbps. Sometimes my line is showing , on tests, a max speed achievable of 5 Mb but I get around 7Mb most of the  time 

The whole settling thing is a bit of myth. The sync may go down further to stabilise the line, but the likelihood of things improving is slim.

[glen]

Here's my stats

AR7 DSL Modem Statistics:
--------------------------------
[DSL Modem Stats]
   US Connection Rate:   1056   DS Connection Rate:   6652
   DS Line Attenuation:   39   DS Margin:      17
   US Line Attenuation:   21   US Margin:      5
   US Payload :      35971728   DS Payload:      257082528
   US Superframe Cnt :   2214705   DS Superframe Cnt:   2214705
   US Transmit Power :   0   DS Transmit Power:   0
   LOS errors:      0   SEF errors:      0
   Errored Seconds:   545   Severely Err Secs:   0
   Frame mode:      0   Max Frame mode:      0
   Trained Path:      1   US Peak Cell Rate:   2490
   Trained Mode:      16   Selected Mode:      16
   ATUC Vendor Code:   4946544E   ATUC Revision:   2
   Hybrid Selected:   1   Trellis:      1
   Showtime Count:      1   DS Max Attainable Bit Rate: 12376 kbps
   BitSwap:      1   US Max Attainable Bit Rate: 1056000 bps
   Annex:          AnxA   psd_mask_qualifier: 0x0000
   Power Management Status: L0   DS HLINSC: 0
   US ACTPSD:       -345   DS ACTPSD: -366
   Total init. errors:    1   Total init. timeouts: 0
   Showtime init. errors:    0   Showtime init. timeouts: 0
   Last showtime init. errors: 1   Last showtime init. timeouts: 0
   ATUC ghsVid:  b5 00 49 46 54 4e 71 b9
   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:    0   FEC:    0   NCD:    0
   LCD:    0   HEC:    0

   [Downstream (RX) Interleave path]
   CRC:    710   FEC:    589552   NCD:    0
   LCD:    0   HEC:    0

   [Upstream (TX) Fast path]
   CRC:    0   FEC:    0   NCD:    0
   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:   749411
   Idle Cell Cnt:   93104764

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

   [Downstream/RX)]
   Good Cell Cnt:   5355886
   Idle Cell Cnt:   585330285
   Bad Hec Cell Cnt:   3149
   Overflow Dropped Cell Cnt:   0
   Rx Packets Dropped Count:   0
   Rx Bad Packets Count:   0


[SAR AAL5 Stats]
   Tx PDU's:   131009
   Rx PDU's:   200876
   Tx Total Bytes:   29959769
   Rx Total Bytes:   251358130
   Tx Total Error Counts:   0
   Rx Total Error Counts:   8


[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

[Lance]

Hi Glen. From looking at your stats, it appears that you have quite a lot of instability on your line which is indicated by the high noise margin on the downstream. Have you noticed many disconnections?

[glen]

Yes Lance I rebooted about 10.30 this morning because the connection was running slow.

[Lance]

But have you noticed any drops of sync not caused by your actions?your router will probably log this information.

[glen]

No Lance, but disconnects could have happened while I was at work. I'll check the router logs  and paste them here.

[glen]

Here's the router logs

Sun, 2002-09-08 12:01:06 - Initialize LCP.
Sun, 2002-09-08 12:01:06 - LCP is allowed to come up.
Sun, 2002-09-08 12:01:28 - CHAP authentication success
Wed, 2009-06-24 10:14:11 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 10:14:45 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 10:12:25 - Router start up
Wed, 2009-06-24 10:35:44 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 10:36:36 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 10:47:40 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 11:07:20 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 11:09:57 - <NTP> Local NTP clock is now synced
Wed, 2009-06-24 11:28:21 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 14:14:36 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 16:16:02 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 16:48:52 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 17:16:50 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 17:32:22 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 17:38:44 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 18:41:24 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 19:07:38 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 20:09:36 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 20:36:20 - Administrator login successful - IP:192.168.0.2
Wed, 2009-06-24 21:24:07 - <NTP> Receive NTP Reply from
Wed, 2009-06-24 21:27:54 - Administrator login successful - IP:192.168.0.2

[Sebby]

You're still on ADSL2+, Glen, as indicated by the upstream rate. As Lance mentions, there does seem to be some instability, though the sync isn't bad for the attenuation.

[Lance]

And the router logs don't seem to show anything either - but the increase in noise margin could have happened very quickly after you were switched to ADSL2+. If you hold a solid sync for 14 days then the noise margin should decrease by 3db which in turn should increase your sync.

[glen]

Strange thing is since the noise margin went up so did the speed.

[Sebby]

When you say speed, is that throughput or sync rate?

[Tacitus]

Not sure what make of router you are using but weren't Zyxel (= AR7 based), amongst those identified as being potentially problematic? 

[glen]

I'm using a dg834g v3 never had no problems with it. I think the problem goes further than just the router being the culprit I think its just my line is not the best with adsl2+. I live in a flat above a launderette and the pair that comes into my flat is the spare pair of wires from the launderette's phone line which has been split inside the electric cupboard downstairs in the launderette, instead of running a brand new line from the pole to the flat. Maybe the noise from the electric cupboard could be the culprit?

[glen]

Sorry Sebby yes throughput is what I mean.

[Sebby]

It could well be the electric in the cupboard. It could also be interference from the other pair in the same line.