Speed down from a stable 80/20 to an IP Profile change of 49/11
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Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 10:46 AM
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Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 10:49 AM
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It is not common for someone to need a DLM reset with FTTC. If your line has been banded and you're synced at the top end of the band, then a reset will be appropiate. If your line is not synced at the top of your band, then DLM is not restricting your sync speed.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 12:55 PM
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It is not uncommon.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 1:11 PM
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People forget that xDSL is rate adapative.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 1:46 PM
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Quote from: jsamuel Thank you for that information, chrcoluk
I wonder why OR can do it remotely now, but PN still can't? PN is a BT company, after all.
They have always been able to do it remotely, DLM isnt in the DSLAM, its controlled in a server.
When an engineer does a reset, he rings the openreach support desk and asks them to carry out the reset.
ISP's can do it remotely by changing the profile because on a profile change a DLM reset is automatic, you will have to ask why plusnet dont want to do profile changes, but I guess it is due to cost.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
21-08-2015 3:43 PM
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DLM is run at the DSLAM/MSAN level, and has done since ADSL*
see this document
It wouldn't make sense to run it on a server down the network, since it only controls the line between the cabinet and the EU.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 8:51 AM
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Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 9:04 AM
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DSM client -> DSLAM/MSAN
The DSLAM is a bit more than a 'modem'
You're correct about the daemon sending instructions to the client, but the client is the one that sends instructions to the daemon to tell it when the line is unstable. Resetting the spectrum profile at the DSLAM will tell the daemon to adjust DLM.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 9:58 AM
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Yes, the cabinet sends the line stat information to a server. And yes, the server sends back the adjustments required to the cabinet. However, the algorithm that decides the changes to be made is remote from the cabinet.
I would say that is as close a definition as is reasonable to say that DLM is implemented remotely.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:00 AM
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Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:26 AM
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Element Manager = what I called the "DSM client"
RAMBo = "DSM daemon"
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:36 AM
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Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:50 AM
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Only time those cabinets would be accessed is for hardware maintenance or hardware swapouts.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:58 AM
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Rather than waste time on this diversion about who, what, why, where and resets of DLM, access to cabinets, surely it would be more sensible to try and discover if there are any other reasons for what appears to be a banded profile.
@jsamuel
Other than you ignoring the 30 minute rule. Were you rebooting a few times as well? The comments about transmit power may again be related to the banded profile with the accompanying high SNRM but you are fairly close to the Cab, it all rather depends on the algorithms used by the Modem to calculate these things.
As this is obviously not a standard OR issue modem, is it running the latest firmware capable of being compatible with G.INP? Otherwise that may have an impact on achievable sync speeds.
Re: Speed down from a stable 80/20 to an IP Profile change of 49/11
22-08-2015 10:58 AM
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