"Loss of signal" failures? - Issue ?

[#1]

Hi,

I was wondering if a GEA test might reveal anything about why I'm suddenly seeing 'LOS Failures' on my fibre connection - 4 in the last 24 hours so far I believe.

I've only had fibre for a fairly short period and the connection started off being 66/14 with a considerable number of errors (e.g. ES & FECS) on both up & downstream.

Inexplicably the downstream errors simply stopped after approx. 3 weeks and since then after the SNR margin was dropped from 6dB to 3dB - presumably by DLM is now 70/14 - which isn't too bad at all - although the upstream is only just meeting the BT estimate for the line and the errors continue on that - see the attachment for details.

I'm just concerned over the signal loss and where it might be being caused - if it's my side I'll go through the wiring again but I believe it's pretty clean to start with (no extensions, etc, single filtered master socket). I was hoping the GEA test might reveal this?

Any suggestions gratefully received!

Ian

[#2]

Hi Ian,

Our tests aren't picking anything up.

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	66.7 Mbps
Upstream Speed	14.1 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	721.1
Upstream Rate Assessment	Very Good
Downstream Rate Assessment	Very Good
Interference Pattern	Not Detected
Service Impact	No Impact Observed
Home Wiring Problem	Not Detected
Downstream Policing Discard Rate	0.0
Customer Traffic Level	Upstream and Downstream Traffic Detected
Technology	VDSL
Current 15Min Bin Retrains	0
Last 15Min Bin Retrains	0
Profile Name	0.128M-80M Downstream 4dB, Retransmission High - 0.128M-20M Upstream, Error Protection Off
Time Stamp	2017-08-17T17:15:00

Parameters	MIN	MAX	AVG
Down Stream Line Rate	66.6 Mbps	71.1 Mbps	69.0 Mbps
Up Stream Line Rate	13.8 Mbps	14.8 Mbps	14.0 Mbps
Up Time	863.0 Sec	900.0 Sec	899.7 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	2017-08-30T15:54:04Z	2017-08-30T16:09:04Z
Ingress Code Violation	0	0
Egress Code Violation	0	0
Errored Seconds	0	0
Severely Errored Seconds	0	0
Unavailable Seconds	0	0

Whilst your upstream is marginally below your estimates [by 0.1mbps] I doubt we'd be able to raise a fault based on that. There have been a few drops in your connection over recent days though.

Let us know how your internal checks go.

Anoush