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FTTC line stats - any scope for increased in download speed ?

Farrinaf
Grafter
Posts: 35
Thanks: 2
Registered: 22-03-2013

FTTC line stats - any scope for increased in download speed ?

I know yet another one of those threads .... are my line stats okay.

Scenario thus Sister previously on PlusNet ADSLx2 and synched at circa 19/1 has now moved onto FTTC via PlusNet Unlimted Fibre Extra 80/20 Line went live on the 21/11 and has been rock solid with no disconnections since

I was suprised at the time it went live that the downspeed was only circa high 50's (especially given the very good ADSLx2 line speeds) and that the FTTC Upload has always been 20

BT Broadband Availability Checker showed thus

High Low High Low

VDSL Range A (Clean) 73.9 55.1 20 14.7

VDSL Range B (Impacted) 57 32.4 17.1 7.3

 

Today I briefly swapped out the (spare) ECI modem that has been used for a Draytek Vigor 130 to obtain some line stats which are shown below (note modem was only online briefly)

Vigor> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 59943000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 60221064 bps US Attainable Rate : 21936392 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 17 dB Cur SNR Margin : 6 dB
DS actual PSD : 6. 2 dB US actual PSD : 6. 4 dB
NE CRC Count : 0 FE CRC Count : 149
NE ES Count : 0 FE ES Count : 140
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : b5004946 ITU Version[1] : 544e0000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 17 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
DSLAM CHIPSET VENDOR : < IFTN >

Vigor> vdsl status more
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 0 1
ReTxEnable : 0 0
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 0 0
LOF : 0 0
LPR : 0 0
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 0 2428 (seconds)
ES : 0 140 (seconds)
SES : 0 0 (seconds)
LOSS : 0 33 (seconds)
UAS : 88 20884122 (seconds)
HECError : 0 0
CRC : 0 149
RsCorrection : 0 0
INP : 0 0 (symbols)
InterleaveDelay : 0 0 (1/100 ms)
NFEC : 255 255
RFEC : 16 16
LSYMB : 5410 16064
INTLVBLOCK : 255 255
AELEM : 0 ----

 

I am probably being simplistic but I would have thought that if we were achieving 20 up we should expect to get a comparable download speed eg 73.9 ....

I was wondering if a knowledgeable person could cast their eyes over the above and confirm that it would be pointless chasing PlusNet support to see if they could tweak any futher download speed on the connection.

 

Cheers

1 REPLY
Andrue
Aspiring Pro
Posts: 775
Thanks: 89
Fixes: 1
Registered: 12-01-2015

Re: FTTC line stats - any scope for increased in download speed ?


Farrinaf wrote:

I am probably being simplistic but I would have thought that if we were achieving 20 up we should expect to get a comparable download speed eg 73.9 ....

Nope. It's not just a ratio between up and down. It's more about frequency plans and which frequencies are usable. You can't really use upstream sync to predict downstream speeds. You're doing quite well to get 20 down and high 50s up but in itself does not prove there's anything wrong.

You could raise a fault anyway. PN will tell you whether it's accepted or not.