In reply to a post by RobertoS:

Are those exact numbers, or the nearest "000"?

nearest from 001 to 999

Edited by adslmax (Tue 07-Oct-14 00:18:32)

You'll just have to cut all the other lines from your cabinet .

In reply to a post by RobertoS:

You'll just have to cut all the other lines from your cabinet .

Good thinking! Only if I have the Cabinet key!

My latest stats

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 4
Max: Upstream rate = 27134 Kbps, Downstream rate = 83177 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 66193 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.4 12.1
Attn(dB): 0.0 0.0
Pwr(dBm): 12.4 -0.4

I think that DLM works ok, but reacts to quickly to non line faults like power cuts and modem switch offs [some people like to turn everything off at night and during away from home periods].
Also the circuits in the cabs [including the DLM boards] are prone to interference from within the cab, like from badly shielded transformers and fans etc.
It needs better shielding and re-programing imo.?

Edited by deleted (Tue 07-Oct-14 00:46:23)

An example of it's bad programing is this IMO from Zen's KB

In reference to support.zen.co.uk/kb/KnowledgebaseArticle.aspx?articleid=11511:

What are the DLM thresholds?

Zen Internet provides our Fibre Optic Broadband (FTTC) services on the �Speed� option. A connection should drop no more than 20 times in a 24 hour period, and should error no more than 2 times per minute.

over 2 errors per minute and it can baulk your connection, even though the error rate may not be high enough to be service affecting example could be upto 5-10 per min or 30, per min, But what isn't clear is for how many minutes does this tiny threshold need to be breached for in any 24hrs period before the trigger happy dlm chimes in?
As your connection may suffer from the occasional burst of errors so is dlm going to act because a line had a increased error rate over a duration of 3hrs during the past 30+ days a one off event ? if it does then IMO thats not right

I 100 % agree that there should be an option made available to all ISP's that would override some changes made by DLM in particular restoring Fast Path for those who play online games ect,

Edited by tommy45 (Tue 07-Oct-14 16:34:01)

Not sure what you mean by "bad programing". The Zen document describes the way the parameters are set for the DLM thresholds. If the system allows these parameters and follows them as intended, to me that is an example of "good programming".

Edited by deleted (Tue 07-Oct-14 17:12:44)

interesting that matches to the 2880 ES/day that someone mentioned here last week.

bear in mind 2 ES per min is very different to 2 CRC per min.

an ES can be dozens of CRC or can be just 1 CRC.

Don't forget that many router stats show ES and SES. I wonder which of those is the ES referred to.

An ES represents a second-long period where one or more CRC errors occurred. I'm pretty sure it is this one that DLM monitors.

An SES, or a severely errored second, has a couple of definitions, and I'm not sure which applies.

Definition 1: A second long period where more than a certain percentage of blocks contains errors (usually set at 30%); this is the way I always thought SES was counted.

Definition 2: One SES is counted when 10 consecutive seconds with a non-zero ES happen.