Post 21CN WBC Experiences - Long Line?
Hi
My rural exchange is due for 21CN WBC upgrade this June
I was wondering if anyone has had a good experience following this type of upgrade - specifically on a long line
The 'experts' claim there will be no positive impact for low speed long line sufferers but interested to hear from anyone with 'real life' experience of this
My stats:
Sync around 1.3meg
D/Load around 900k
U/Load around 280k
snr down 6db
Line Att 74db
Router/modem BT 2Wire 2700
Faceplate fitted
big difference from 55 to 74 though a 1.3mb connection with 74 attenuation is good
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ADSL or ADSL2 on a long line?
i have BT business boadband (office unlimited ADSL2 Next Gen (up to 20 Mb)). Historically i have had poor broadband hence swapping to business to try and improve matters. i have now ditched the home hub and gone to a 7800N which has made a big difference. although over Christmas the flashing lights played havoc with the broadband and now i have a high SNR margin and interleaving..
However, my main question is will it be worth me pushing for ADSL2 given my line (stats from DSL stats below). currently my router will only connect with G.DMT so i am assuming i can only get ADSL? Will ADSL2 or indeed 2+ improve speed/stability on a long line with attenuation around 62 dB?
thanks everyone
DSLAM/MSAN type: IFTN:0x71c8 / v0x71c8
Modem/router firmware: AnnexA version - A2pB025f.d22k
DSL mode: G
Status: Showtime
Uptime: 3 days 15 hours 12 min 13 sec
Resyncs: 1 (since 16 Jan 2015 09:24:44)
Downstream Upstream
Line attenuation (dB): 62.0 31.5
Signal attenuation (dB): Not monitored
Connection speed (kbps): 2944 448
SNR margin (dB): 9.7 9.0
Power (dBm): 17.8 12.6
Interleave depth: 16 4
INP: 0.65 1.88
RSCorr/RS (%): 0.0225 0.0051
RSUnCorr/RS (%): 0.0093 0.0000
ES/hour: 0 0
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 688 Kbps, Downstream rate = 3264 Kbps
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 2944 Kbps
Link Power State: L0
Mode: G.DMT
TPS-TC: ATM Mode
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 9.6 9.0
Attn(dB): 62.0 31.5
Pwr(dBm): 17.8 12.6
G.dmt framing
K: 93(0) 15
R: 8 16
S: 2 8
D: 16 4
Counters
SF: 18470539 18470803
SFErr: 4432 697
RS: 627998338 157001825
RSCorr: 141398 8020
RSUnCorr: 58116 0
HEC: 3611 586
OCD: 78 8
LCD: 0 2
Total Cells: 2179945133 0
Data Cells: 84244409 0
Drop Cells: 37
Bit Errors: 0 0
ES: 2322 0
SES: 49 0
UAS: 98 98
AS: 314005
INP: 0.65 1.88
PER: 1.75 1.75
delay: 8.00 8.00
OR: 32.00 32.00
Bitswap: 28562 750
Total time = 1 days 19 hours 20 min 38 sec
FEC: 213384 0
CRC: 5918 0
ES: 2322 0
SES: 49 0
UAS: 98 98
LOS: 1 0
LOF: 9 0
Latest 15 minutes time = 5 min 38 sec
FEC: 1740 0
CRC: 36 0
ES: 9 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 29484 0
CRC: 440 0
ES: 75 0
SES: 1 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 19 hours 20 min 38 sec
FEC: 57861 0
CRC: 1256 0
ES: 426 0
SES: 9 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 16164 0
CRC: 422 0
ES: 228 0
SES: 2 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 3 days 15 hours 13 min 23 sec
FEC: 141398 8020
CRC: 4432 697
ES: 1803 0
SES: 28 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Solved!
Go to Solution.Welcome to the BT Residential Customers forum
As you are a business user, please could you may be better posting on the BT Business forum at http://business.forums.bt.com/
PS With that amount of line loss, there would be no advantage in moving to ADSL2 or ADSL2+.
Line attenuation (dB): 62.0
Estimation of your maximum rate adaptive adsl speed
Downstream
Attenuation
dB
Approx
Line Length
km
dslMAX (20CN)
kbps
IP Profile
kbps
BT 21CN WBC
& adsl2+
kbps
IP Profile
kbps
adsl2+ (LLU)
kbps
Throughput
kbps
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones. -
BB speed with FTTC/21CN WBC
Hi,
trying to discover if I will benifit from FTTC/21CN WBC work thats happening to my exchange. I live in a small village on what is classed as a long ADSL Line, I sync around 900k. Now I know my exhange is SNOD(snodland) however talking to the BT engineer thats been working on my fault, most of his work with my line has been in a smaller exchange about 1 mile down the road(as the crow flies) next to our firestation. So I presume we dont have any street cabs but our lines go via telegraph poles direct to this smaller exchange for want of a better word.
Our exchange is due for upgrade very soon
With FTTC status end of March 2012
21CN WBC status end of August 2012.
Will this benifit me? I still have the same long line to the exchange, if FTTC is enabled, as far as I know(just from looking) we have no cabinets in our street. So appealing to the experts here.
Cheers, Leeif your connection speed is <1mb then 21CN will make no difference to your connection speed. FTTC will depend on how far away the cabinet is from your home and more important if in fact you get a new infinity cabinet if you are that far away from the exchange
If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’. -
How to increase your speed on long lines
After 4 engineer visits and everyone saying that at 1300m from the cabinet 12mb was going to be the best speed I could get I have found a way to nearly double my speed. Dumped the homehub5 and replaced it with a Billion 8800NL and now have a steady 21.5mb and not one dropped connection.
So if you are on a longer line its worth a try for £68 from Amazon.
Thought I would share this as I found it so frustrating that I could get nowhere near the speed I was sold now im just 1mb away from the lower estimate so I can live with that.That's an amazing speed for your attenuation
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