Hey guys, trying to troubleshoot my uncles ADSL, quite high Noise, can't figure out why.

On TPG 24mbit plan, living on Eleventh Ave @ St Lucia. (How the hell do you figure out where the exchange is?)

Modem is the one they got with the plan, but do modems CAUSE high noise, or just make better or worse use of the noise conditions ???

Any help greatly appreciated.

http://josh.net.au/error.jpg

http://josh.net.au/stats.jpg

Meanwhile, my ADSL2 at Toowong is lovely, thanks for asking =)

http://josh.net.au/adsl.JPG

Coorparoo ADSL2+ on iinet.

http://files.nextexit.org/images/lulz.jpg


even with a s***gear lulz which seems a million times better than this brand new 7300A I bought a few weeks ago.

Anyone else have problems with the 7300 and torrents causing the pings to go to about 3000 after an hour or so? Seems like it is trying to remember too many connection's or somethin'.

Oh and on topic, check DSL Maps for the exchange locations jmr

LOL AM I EDITING MUCH???

last edited by reso at 23:22:40 27/Aug/07

You better keep editing too cause your link doesn't work

EDIT: Nice site, I'm only 3.64km from the nearest exchange :(

last edited by Lynx at 00:07:57 28/Aug/07

I might be stating the obvious..

1. Have you done an Isolation Test
2. What's the line like without anything connected (eg Phones).
3. Is there any obvious EMI..

Could always post on Whirlpool if you get no answers..

last edited by Morsar at 22:51:09 27/Aug/07

Yeah done an isolation test - found a security system plugged into the phone line in the bedroom cupboard - but can't find anything else.

Line is exactly the same - under 5000 sync

Obvious EMI ? Electro Magnetic ??? Not that I can detect?

adsl is blowin goats generally 2nite don't know why.

probably bogans

Soz the link didn't need the s in maps

put your phone number into whingepool and it will tell you your local exchange

then look it up on google maps and measure the distance

reso, you gotta update teh firmware on the 7300

the netgear (lolz) is indeed a way s***ty router, i coudlnt wait to axe mine (nice speeds though)

my 7300 handles torrents 24/7 at full speed with no dramas (with latest firmware)

Hmm I thought it was that Spook, pretty sure I am running the latest ones from billion.com.au. Will double check tho cause the billion syncs a bit faster :o

Yeah done an isolation test - found a security system plugged into the phone line in the bedroom cupboard - but can't find anything else.

Line is exactly the same - under 5000 sync

Obvious EMI ? Electro Magnetic ??? Not that I can detect?

Do they use it? Security systems are the biggest enemy of ADSL. Disconnect it if they're not using it, cause you need to get a central splitter if they are.


Oh yeah, and just for the record, I get similar downstream line noise to your modem, and a little worse (i think -20dB) upstream, and I get ~4.5/1 with a central splitter.

last edited by mongie at 08:51:19 28/Aug/07

atm0-internode#sh dsl int at 0
ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.5 (ADSL2+) Annex A
ITU STD NUM: 0x03 0x2
Chip Vendor ID: 'STMI' 'BDCM'
Chip Vendor Specific: 0x0000 0x619F
Chip Vendor Country: 0x0F 0xB5
Modem Vendor ID: 'CSCO' ' '
Modem Vendor Specific: 0x0000 0x0000
Modem Vendor Country: 0xB5 0x00
Serial Number Near: FHK0953215G
Serial Number Far:
Modem Version Near: 12.4(6)T
Modem Version Far:
Capacity Used: 100% 100%
Noise Margin: 8.0 dB 9.0 dB
Output Power: 20.0 dBm 12.0 dBm
Attenuation: 40.0 dB 16.0 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0xF5
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction: 0x00
Interrupts: 7662 (0 spurious)
PHY Access Err: 0
Activations: 1
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: embedded
Operation FW: embedded
FW Version: 2.5.42

DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 17010 0 1014
Cells: 0 529978950 0 2490845175
Reed-Solomon EC: 0 47852 0 0
CRC Errors: 0 2616 0 0
Header Errors: 0 2415 0 0
Total BER: 0E-0 65535E-255
Leakage Avarage BER: 0E-0 65535E-255

LOM Monitoring : Disabled


DMT Bits Per Bin

Not able to get complete DMT bin information.Retry "show dsl" after few seconds.

DSL: Training log buffer capability is not enabled
atm0-internode#


<3 internode

The Toowong exchange is next to BBC on that intersection with the little bridge up the road from the RE. If u follow... :/

Ya rightio, so Toowong Exchange, to Seventh Ave St Lucia

Google Maps returned about 3.7km

Versus my house, which Google says is 1.5km

Anyone else ~3-4km from exchange and can post Sync Speeds?

Does this look about right for the location of the Toowong Exchange ?

http://josh.net.au/map.jpg

Well I'm loving this edit - looks like its stiff s*** for him, (this is a guide form whingepool)

A way to "guesstimate" the line attenuation is the following: (originally posted by Just 'Adam')

Less than 1km should be 23-24Mbit
1.0km = 13.81dB = 23Mbit
1.5km = 20.7dB = 21Mbit
2.0km = 27.6dB = 18Mbit
2.5km = 34.5dB = 13Mbit
3.0km = 41.4dB = 8Mbit
3.5km = 48.3dB = 6Mbit
4.0km = 56dB = 4Mbit
4.5km = 62.1dB = 3Mbit
5.0km = 69dB = 2Mbit



last edited by jmr at 10:12:38 28/Aug/07

last edited by jmr at 10:21:38 28/Aug/07