Showing results for 
Search instead for 
Did you mean: 

New line - connection unstable

Posts: 4
Registered: ‎04-05-2017

New line - connection unstable

Hey all,

I've just recently had my line updated to Fibre (torture while we waited!)
Since the line has gone live we've had a problem with it being highly unstable.
Now I know to expect some instability due to new line configuration and such but my connection would drop when even the slightlest load was placed on it, 500mb download? Reset, low quality video stream from Youtube? Reset...
Now I've had a play with my router settings and increased the stability adjustment to 10 dB which seems to have helped but of course it's had an impact on my speed.

Is there any advice anyone can give for this and is it possible to check the status of the line as well? (really hoping OR haven't done a rush job)

Aspiring Champion
Posts: 876
Thanks: 348
Fixes: 17
Registered: ‎07-07-2009

Re: New line - connection unstable

Changing the SNRM on a Fibre connection has no effect at all so you must have something else going on. Can you provide any connection stats from the router?

Community Veteran
Posts: 1,636
Thanks: 294
Fixes: 35
Registered: ‎13-08-2015

Re: New line - connection unstable

Which service have you gone for? Unlimited Fibre or Unlimited Fibre Extra?

There is a known problem with the Unlimited Fibre, more details on this thread it might be worth posting there and asking @Bob Pullen to make the mod on your router.

Posts: 4
Registered: ‎04-05-2017

Re: New line - connection unstable

I've gone for the Unlimited Fibre Extra.

Sorry I probably should have mentioned earlier on that we're using an Asus AC68U as well (although the PN router also has issues being reported by other's in the house)

As for stats for my router (hoping this pastes in correctly)

router stats.png

Seasoned Hero
Posts: 6,973
Thanks: 1,533
Fixes: 12
Registered: ‎01-12-2010

Re: New line - connection unstable

@deansmith02 i have the DSL AC68U this is what i have Capture.JPG





Asus ROG Hero Vii Z97 , Intel i5 4690k ,ROG Asus Strix 1070,
samsung 850evo 250gig , WD black 2 TB . Asus Phoebus sound ,
16 gig Avexir ram 2400 , water cooling Corsair H100i gtx ,
Corsair 750HXI Psu , Phanteks Enthoo pro case .
Plusnet Help Team
Plusnet Help Team
Posts: 10,054
Thanks: 3,181
Fixes: 506
Registered: ‎21-04-2017

Re: New line - connection unstable

Hey Dean, welcome to the community forums firstly.


I am sorry to hear you're having problems with your connection. Things seemed pretty unstable last week:


Testing your line, your router is still in sync below your estimates:

Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0003
Description No problem found, OAM test is not currently supported on this line.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 27.0 Mbps
Upstream Speed 11.7 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 Not Detected
Estimated Line Length In Metres 649.5
Upstream Rate Assessment Reasonable
Downstream Rate Assessment Low
Interference Pattern Regular Interference Observed Daily
Service Impact Retrains Observed
Interference Duration Longest Occurrence From 09:15 to 09:30
Interference Location Customer Premise
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-80M Downstream, Error Protection Off - 0.128M-20M Upstream, Error Protection Off


If you haven't already I've advise plugging your router into the test socket, as explained here: and if you still experience problems then to raise a fault to us at as it's likely to need an engineer to investigate this.

If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team
Posts: 4
Registered: ‎04-05-2017

Re: New line - connection unstable

Hey all, thanks for the replies.

Ok, so I've got the faceplate of the master socket off and router (and only the router) plugged in to the test socket.
My router stats seem to be a little more in line with a stable connection and the speed and load testing that I've done haven't caused a drop out as yet and so far it's been a stable connection for the last 40 minutes.

Speed is still a little slower than expected but I understand it can take a little while for this to settle on a new line anyway and the router seems to be picking up the correct line speed now (within reason) so I'd say this is a settling down issue with the speed.

To give you an idea, router plugged in to the test socket and no stability adjustment in place (I could get it stable with a value of 13db in this before).

So this leaves me wondering if there's a problem with the faceplate connector on my master socket as the connection seems fine in the test socket?
Any ideas here?

Once again thank you all for the help.


My current DSL stats:

router stats 2.png

It's been a little over an hour since I reconnected the faceplate and i've been running speed tests and downloading to put it to the test under pressure.
So far I've had no drop outs and the speed is for the most part remaining constant with a few spikes in the right direction.
While I was reconnecting the faceplate I noticed that the socket itself was actually a little loose (seemed fine with the faceplate on?) so I tightened up the screws, could it be that this was the cause of the issues? I'm pretty sure it's cabling that connects to the back though which would rule this out wouldn't it? Any insights would be appreciated.

Community Veteran
Posts: 5,223
Thanks: 494
Fixes: 22
Registered: ‎10-06-2010

Re: New line - connection unstable

Are there any extension sockets (which would normally be disconnected when you expose the test socket)?

Do you have a filtered faceplate?

Also, are you using any powerline network adapters?

Posts: 4
Registered: ‎04-05-2017

Re: New line - connection unstable

No extensions

The faceplate requires a filter to be plugged in to it

Yes I use powerline adaptors but the problems come no matter how I'm connected be it wired over powerline or direct to router (with no powerlines connected) or wireless.

That being said I've had no stability issues since re-connecting the faceplate, a solid 4 hours of uninterrupted connection so far but I'm about to put it through a painful stress test by streaming a game, so far all previous levels of load that would have killed the connection have managed to go through without a hitch so I'm hoping by some strange reason the faceplate being loose was the problem and that it's now sorted, one way to find out!

Any other suggestions on putting this to the test?

Update - 07-05-17

Line became unstable again last night around 9pm, left it to "settle" over night without any load, now my router is scheduled for an automatic restart cycle every Sunday at 2am so one of the down time cycles I expected, the rest that I'm getting are issues relating to either "ethernet disconnected / link down" or "connection reset by peer".

Going to get the report logged with the fault team today as my hopes of the loose faceplate being the issue turned out to be wrong. Dang.