In reply to a post by ironman12345:

Sometimes even on a very stable line it is important [if you build PC`s] to be able to disconnect the modem without problems from the DLM system.?

I don't quite see what you mean there.

Just don't have the PC connected to the modem (or modem/router)? If it is important to test LAN connectivity, then the test rig should have a separate modem and router.

Edited by RobertoS (Sat 09-Sep-17 22:52:07)

In reply to a post by RobertoS:

In reply to a post by ironman12345:

Sometimes even on a very stable line it is important [if you build PC`s] to be able to disconnect the modem without problems from the DLM system.?

I don't quite see what you mean there.

Just don't have the PC connected to the modem (or modem/router)? If it is important to test LAN connectivity, then the test rig should have a separate modem and router.

Yeah I agree RobertoS , Was not thinking straight when I posted that.
But it does not alter the fact that the user needs a lot more info about the DLM from OR.

In reply to a post by ironman12345:

But it does not alter the fact that the user needs would like a lot more info about the DLM from OR.

Corrected that for you.

BT/OR are more interested in minimising connection problems for themselves than satisfying customer curiosity, and if that means a few nerds (and I include myself in that!) don't get everything they would like then tough.

Basically- if you don't like it, get yourself a leased line.

Edited by billford (Sun 10-Sep-17 00:02:40)

And with a leased line the termination kit is often managed and thus closed off to you...so obsessing about light levels is not possible.

I think you have the wrong of the stick...not the first time.

The DLM knows nothing about 'you the person', but if you are going to attempt to laboratory test the line to try and discover why errors that are being corrected are appearing then you do very much risk confusing the DLM system, i.e. it will have been written with the average user in mind, not those attempting to run a DSL diagnostics facility.

If you want to fund the cause of the FEC you ideally need to find a modem with microcode that will log the all the conditions at the nano second of each FEC i.e. why try to understand why it was an error and why it was able to be corrected. You also need access to the DSLAM logging as its decision making can have an impact on how things behave, plus a full map of the cross talk environment for your bundle, which DSLAM records will give you.

In reply to a post by ironman12345:

True Icaras , but I do not see why OR keeps the workings of the DLM so secret as it is very important to the user to understand what they can and cannot do.

I think it would be a tiny minority of users that would be worried by this. The OP has run up against DLM, voluntarily, in the past but very few would be messing with it.

In reply to a post by MrSaffron:

And with a leased line the termination kit is often managed and thus closed off to you...so obsessing about light levels is not possible.

Nearly always in my experience. Laser terminates on an operator-provided NTE and you get an Ethernet hand-off.

Saves headaches with end users using the wrong optics.

In reply to a post by Ignitionnet:

In reply to a post by ironman12345:

True Icaras , but I do not see why OR keeps the workings of the DLM so secret as it is very important to the user to understand what they can and cannot do.

I think it would be a tiny minority of users that would be worried by this. The OP has run up against DLM, voluntarily, in the past but very few would be messing with it.

I understand thanks! So the answer to the DLM , is if you cannot control it do not mess with it.
But I had problems about a year ago with the DLM knocking about 20Mbps off of my line sync and then took 4 months to recover it. Since then I have respect for the DLM.

I don't know about respect but you could be right. For some reason DLM has been paying a lot of attention to my line over the past month. The speed has gone up, then it went down. This morning saw another reset back up to 71.8mb (from 68mb). Given that in the past year I have had very few and far between resets (I could count them on a couple of fingers), I'm impressed. It's found me at last.

If only the resets were always plain sailing though. For some reason my modem didn't like the one last week..... TBB gave me 3mb download, I stopped the test. Ookla gave me this I ended up switching off the modem and router and restarting, with fingers crossed. Happily it started syncing at a higher rate. DLM must be maturing!

In reply to a post by 69bertie:

I don't know about respect but you could be right. For some reason DLM has been paying a lot of attention to my line over the past month. The speed has gone up, then it went down. This morning saw another reset back up to 71.8mb (from 68mb). Given that in the past year I have had very few and far between resets (I could count them on a couple of fingers), I'm impressed. It's found me at last.

If only the resets were always plain sailing though. For some reason my modem didn't like the one last week..... TBB gave me 3mb download, I stopped the test. Ookla gave me this I ended up switching off the modem and router and restarting, with fingers crossed. Happily it started syncing at a higher rate. DLM must be maturing!

I do not know if OR have revised the DLM system , but personally I think that it has become "less harsh" in the way that it works.?