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DLM/GEA Check requested please

Posts: 1
Registered: ‎23-05-2019

DLM/GEA Check requested please


Just switched over to Plusnet about 2 weeks ago but my speed has dropped by around 20% - from around 36/37Mb to 30/31.

It may be too early in terms of the DLM but can someone check what my DLM band is and also any GEA check?

Can my DLM be reset or forced up at all to try and match my previous speeds...?

My SNR is hovering around 6.


Seasoned Hero
Posts: 6,756
Thanks: 3,026
Fixes: 203
Registered: ‎30-06-2016

Re: DLM/GEA Check requested please

When you change provider Openreach reset the DLM to 6dB. If your line will support it then this should drop to around 3 with a resultant increase in speed. Unless your line is banded you just have to be patient and wait for it to update automatically.

Plusnet Alumni (retired)
Plusnet Alumni (retired)
Posts: 1,325
Fixes: 63
Registered: ‎09-10-2018

Re: DLM/GEA Check requested please

Thanks for your post @mrshed.


On running a GEA test we can see that the SNR is currently at 3db with the banding for the line looking correct:

GEA Test Detail
Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0000
Description GEA service test completed and no fault found .
Main Fault Location OK
Sync Status In Sync
Downstream Speed 27.7 Mbps
Upstream Speed 5.5 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Detected
Estimated Line Length In Metres 975.4
Upstream Rate Assessment Low
Downstream Rate Assessment Reasonable
Interference Pattern Regular Interference Observed Daily
Service Impact No Impact Observed
Interference Duration Longest Occurrence No Timing Information
Interference Location Customer Premise
Interference Observed In Days 2
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Technology VDSL
Profile Name 0.128M-40M Downstream 3dB, Retransmission High - 0.128M-10M Upstream, Error Protection Off
Time Stamp 2019-05-10T12:15:00
Parameters MIN MAX AVG
Down Stream Line Rate 25.4 Mbps 37.5 Mbps 30.3 Mbps
Up Stream Line Rate 5.3 Mbps 7.1 Mbps 6.0 Mbps
Up Time 0.0 Sec 900.0 Sec 897.2 Sec
Retrains 0.0 1.0 0.0
Current and Last 15 Minute Bin Performance
Parameters Last Traffic Count(Upto 15 mins) Current Traffic Count(Upto 15 mins)
Start Time Stamp 2019-05-23T10:36:38Z 2019-05-23T10:51:38Z
Ingress Code Violation 0 0
Egress Code Violation 0 0
Errored Seconds 0 0
Severely Errored Seconds 0 0
Unavailable Seconds 0 0


The only slight concern is that it's detected CrossTalk, however on testing the line further we aren't seeing anything that could be construed as an issue, with copper line tests showing clear.


We'd recommend giving it another week or so for the line speed to pick up.