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[spitz]

ECI cab + HG612:

1) 42/18 current stable sync. Paying for Sky 80/20 package.
2) After BTOR engineer visit 79000 but that lasted for a day. After that, it went to 48k and from there to 42k
3) A month since moving to this property. 7 days since (2nd) engineer visit.
4) High ES rate
5) After moving into the property (on the 1st) the downstream was 48000. A few days later it went down to 42k. Arranged for OR engineer to visit on the 11th and he swapped the master socket for the latest MK4. His equipment showed 68000kbps downstream but my hg612 was still connecting at 42k.
Since nothing changed for 2 weeks a second engineer came to the house. He requested a DLM reset and went to inspect the PCP.
According to his words, "he hasn't changed anything". The modem resynced at top speed and was stable throughout the day.
After a spike in ES the DLM started throttling and the sync wend down to 42mbps (see graphs).

The BT checker suggests 79.8-60mbps on a clean line and 69.7-40mbps on an impacted line.


Current line stats:


Stats from the engineer visit:

[ejs]

@spitz

I'm not sure the line rate has actually been capped by the DLM, the SNRM doesn't seem any higher than the usual 6. It sounds more like a bad line or something faulty somewhere.

[j0hn]

As ejs pointed out your line definitely doesn't look banded by DLM. Are you able to post the raw telnet stats from the HG612? From the images you posted it seems very unlikely the BT tester could achieve 68mb. The line doesn't appear to have enough spare SNRM for even a few mb more, certainly not another 26mb.

I would recommend creating your own thread, including the telnet stats from the HG612. We could then take a more detailed look at the line and try work out what the problem may be.

[spitz]

[Moderator note: The original post and its replies have been split off from the "Have you got a line which is capped by DLM?" topic and have now been merged with this post.]

Following a post I made in another thread (http://forum.kitz.co.uk/index.php/topic,17563.msg342114.html#msg342114) I'm posting my modem stats here. Hopefully someone might have a suggestion what might be causing the line to underperform.

After 2 engineer visits the line didn't improve and none of them could really tell what is going on.
The first engineer installed a new MK4 socket (no improvement) and 2 weeks later the 2nd engineer performed a DLM reset. Shortly after the DLM reset the modem connected at 79000 and was able to hold it for about a day. After that the line speed went back to the usual 42mbps (see graphs). According to the BT website the line should be doing at least 60 as the cabinet (ECI) is not that far away.

Something worth mentioning is that the line enters the house in the bedroom where it's connected to the internal wiring using 2 jelly crimps and from there goes to the master socket upstairs.

I'm hesitant about calling Sky again and requesting a 3rd visit because this might end up again as a waste of my time.

All of this is happening in London W14 and sadly there is no Virgin in that bit of area.
Any advice is highly appreciated

xdslcmd info --stats http://pastebin.com/gdTuT4gs
xdslcmd info --pbParams http://pastebin.com/6V4DszRC
xdslcmd info --QLN http://pastebin.com/WC8MYMxT
xdslcmd info --SNR http://pastebin.com/Av3eg8ws
xdslcmd info --Hlog http://pastebin.com/1zxENgqW

Current line stats:


Stats after the engineer visit:

[spitz]

Sky sent another BT engineer today... According to him, he hasn't done anything... yet my modem synced at 82996kbps.   

Code: [Select]

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 29073 Kbps, Downstream rate = 82996 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 79987 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (41,857) (1218,1959) (2795,4083)
  VDSL Port Details   Upstream   Downstream
Attainable Net Data Rate:     29073 kbps     82996 kbps
Actual Aggregate Tx Power:        2.6 dBm       2.7 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 0.2 13.5 19.9   N/A   N/A 8.5 17.7 27.8
Signal Attenuation(dB): 0.1 13.4 19.9   N/A   N/A 10.3 17.6 27.9
SNR Margin(dB): 13.8 12.8 12.2   N/A   N/A 7.3 7.1 7.2
TX Power(dBm): -4.8 -33.0 1.8   N/A   N/A 10.3 7.1 7.6

More stats:
http://pastebin.com/vripTkvp

[RealAleMadrid]

Your actual sync is 79987Kbps the Max figure is a calculated value but sync is limited to 80Mbps anyway. There is something very dodgy with your line, you had a downstream attenuation of 19.1 dB when you sync was ~46Mbps. Now your attenuation is 13.4dB so your sync is much higher so I wouldn't be surprised if your sync drops again as it did before. The line fault - probably a bad joint needs to be found.

[spitz]

After 5 engineer visits I finally got an SFI to come to the house...
His PQT didn't pass and he located HR fault on the pole across the road. He just like the others refused to climb the pole and fix the issue claiming that a hoist has to come even though a 10yo kid can climb on there.

The saga continues as I'm waiting for his report to be closed (4 days since the visit) so my ISP can book yet another engineer.

Is it a common pattern that engineers don't want to use their ladders?! 

[Chrysalis]

If BT dont want to climb poles then they need to remove them, that response you had is farcical.

[d2d4j]

Hi

I'm sure black sheep could give a better  reply, but if there were any dangers around the pole like a fence, or the pole has a warning not to be climbed, then it is a reasonable response from OR.

I have climbed poles, and the view from the top is very different from below, more so then climbing ladders against a wall, as you get a 360 degree view, and can seem as though there's nothing holding you. It is a strange feeling, and yes, I still climb ladders in excess of 2 storeys tall and sometimes poles.

Many thanks

John

[c6em]

If the pole is out of its inspection time then yes BT staff are not permitted to climb them.
The pole have markings on them to tell BT staff when it was last inspected and passed.
Solutions are either
1. Get the inspection team along to re-certify the pole as safe to climb - if it is safe that is.
2. Use BT van with a cherrypicker type lift on the back to access the top

If the pole is deemed unsafe then obviously it will go into the waiting list for pole replacement

[spitz]

According to the markings the pole has passed inspection about a year ago. No obstructions whatsoever. I'm talking about an average wooden street telephone pole. They seem to be disappearing though as cables are going underground

It's completely understandable that if climbing it is not an option they call for a hoist and fix the DP once and for all. The issue here is that they don't seem interested in resolving the issue. To me the way LL1/LL14 seem to work is: if (dial tone exists || modem connects) { line OK; }. I'm saying this after having 5 of them at my house 

[Chrysalis]

Hi

I'm sure black sheep could give a better  reply, but if there were any dangers around the pole like a fence, or the pole has a warning not to be climbed, then it is a reasonable response from OR.

I have climbed poles, and the view from the top is very different from below, more so then climbing ladders against a wall, as you get a 360 degree view, and can seem as though there's nothing holding you. It is a strange feeling, and yes, I still climb ladders in excess of 2 storeys tall and sometimes poles.

Many thanks

John

What stopped them sending the hoist there and then?

[ejs]

Perhaps it requires some sort of traffic control so they've got to arrange it with the local highway authority.

[NewtronStar]

You rarely see a BT Engineer climbing the distribution poles these days as it's left to third party network engineers in my neck of the wood that would be KN networks they seem to do all the heavy underground and pole stuff     

KN engineer climbing my pole 2 months ago
 

[c6em]

What stopped them sending the hoist there and then?

Maybe lack of available equipment - ie the local hoists had been prebooked/allocated on other jobs and were all busy or were so far away so as to make it not immediately possible...?