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Author Topic: Estimated Line Length In Metres  (Read 1211 times)

adslmax

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Estimated Line Length In Metres
« on: July 22, 2016, 09:52:14 PM »

I asked Plusnet tech support to run FTTC GEA Test Result to my ticket. I was surprise to see Estimated Line Length In Metres in there.

Code: [Select]
Circuit ID NA Service ID ************
 
 
Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0001
Description GEA service test completed and no fault found but unable to check for customer equipment connected to modem.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 79.9 Mbps
Upstream Speed 20.0 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 243.6
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
Profile Name 0.128M-80M Downstream, Retransmission Low - 0.128M-20M Upstream, Error Protection Off
Time Stamp 2016-07-09T22:00:00
Parameters MIN MAX AVG
Down Stream Line Rate 79.9 Mbps 79.9 Mbps 79.9 Mbps
Up Stream Line Rate 19.9 Mbps 19.9 Mbps 19.9 Mbps
Up Time 900.0 Sec 900.0 Sec 900.0 Sec
Retrains 0.0 0.0 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 2016-07-22T20:01:30Z 2016-07-22T20:16:30Z
Ingress Code Violation 0 0
Egress Code Violation 0 0
Errored Seconds 0 0
Severely Errored Seconds 0 0
Unavailable Seconds 0 0
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ejs

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Re: Estimated Line Length In Metres
« Reply #1 on: July 23, 2016, 06:17:47 AM »

It's not that surprising really. The electrical length needs to be accurately determined to calculate the correct amount of upstream power back-off. The Lantiq dsl_cpe_control program has a command (llsg) to report the estimated loop length (actually it gives two different lengths for two different widths of wire).
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digitalnemesis

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Re: Estimated Line Length In Metres
« Reply #2 on: July 26, 2016, 08:03:54 PM »

Can you find line length from the HG612?
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Chrysalis

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Re: Estimated Line Length In Metres
« Reply #3 on: July 26, 2016, 08:43:28 PM »

the closest thing is the attenuation which can allow you to guess the length.
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