Using Filtered Face Place But Still CRC'S Errors?

hi i'm on sky broadband 8mb connect, i'm using a Filtered face plate with a netgear modem which was supplied, this is connected to a 15metre adsl cable as the router sits on a shelf. Since moving to sky broadband i noticed i'm getting a very slow speed, i was on ukonline 8mb LLU before and had great speeds. I noticed a lot of CRC's Errors, Do You think it could be the modem sky supplied me with?, Anyone know why i have a lot of CRC's Errors? it cant be the 15metre adsl cable could it?

Thank A lot

Edited by j112 (Fri 19-Jan-07 21:45:37)

1] What are your line stats?
2] Difficult to evaluate more than 1 change at a time, so what exactly ahs changed?

/usr/sbin/adslctl: ADSL driver and PHY status
Status: Showtime Channel: FAST, Upstream rate = 448 Kbps, Downstream rate = 4096 Kbps
Link Power State: L0
Mode: G.DMT
Channel: Fast
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 5.9 20.0
Attn(dB): 54.0 31.5
Pwr(dBm): 17.9 11.9
Max(Kbps): 4128 1016
Rate (Kbps): 4096 448
G.dmt framing
K: 129(0) 15
R: 0 0
S: 1 1
D: 1 1
ADSL2 framing
MSGc: 1 1
B: 129 15
M: 1 1
T: 1 1
R: 0 0
S: 1.0000 1.0000
L: 1040 128
D: 1 1
Counters
SF: 188255 188253
SFErr: 2218 0
RS: 0 0
RSCorr: 0 0
RSUnCorr: 0 0

HEC: 539 0
OCD: 1 0
LCD: 0 0
Total Cells: 30918744 0
Data Cells: 1917823 0
Drop Cells: 0
Bit Errors: 0 0

ES: 464 0
SES: 29 0
UAS: 12 0
Total time = 53 min 36 sec
SF = 188255
CRC = 2218
LOS = 2
LOF = 0
ES = 464
Latest 1 day time = 53 min 36 sec
SF = 188255
CRC = 2218
LOS = 2
LOF = 0
ES = 464
Latest 15 minutes time = 8 min 36 sec
SF = 30405
CRC = 666
LOS = 0
LOF = 0
ES = 115
Previous 15 minutes time = 15 min 0 sec
SF = 52931
CRC = 791
LOS = 0
LOF = 0
ES = 160


There you go, thanx

In reply to:

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this is connected to a 15metre adsl cable as the router sits on a shelf

---

That's a very high shelf! If you want to make sure that the cable isn't at fault, can you temporarily move the modem so that you can connect directly into the socket with a short lead?

How exacltly do you go about getting those stats from a netgear then ?

Thanks

ok well today i will:
try a diffrent modem
plug directly into the master socket taking the filtered adsl plate off getting rid of all extension wiring.
use a shorter adsl cable

any other ideas? i will post results back soon

thank for all the help

update: tried differnt modem still loads of crc errors
pluged directly in still crc errors
i will try a shorter cabe later on but doubt it could be this as its a new cable and i have always been getting slow speeds even since i joined sky connect however i will give it go. Strangely i just did a speed test and got a good result for once

http://www.speedtest.net/result/76515080.png

connected at 4416 kbps

Edited by j112 (Sat 20-Jan-07 10:29:15)

to get router stats use this link:
http://dg834gt.mognuts.com/NetgearRouterUtility.html

click get detailed modem stats, then press the back button and select get all modem stats, and then download save the file and open it with notepad

just changed the cable still the same, still getting loads of crc errors

Total time = 1 hours 25 min 3 sec
SF = 32491
CRC = 1393
LOS = 31
LOF = 0
ES = 8993

Changed the cable, or moved the router next to the socket with a short cable? If the latter then it may just be that a long cable is picking up lots of noise (perhaps it's not twisted pair, or you've left the ring wire connected, or you're running it near an interference source). If you eliminate the cable entirely then it could be that Sky have put you on a lower SNR margin than UKOnline, or perhaps UKOnline had you on Interleaved? Either of which you will need to contact Sky to change.

ok thanx 4 the help will give it a go, whats the diffrence between interleave and fast?, also i'm on sky connect is that ADSL1?, if i change my router to adsl 2 mode will it have any effect thanx