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What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 6:57 pm
by Bermo
Hi Everyone,

I have just signed up to Exetel and had my line activated 3 days ago.
The best line speed I seem to be able to get is 4Mbit :(

Device Info

Board ID: 96338L-2M-8M
Firmware Version: 0.1.0.1 build 100914 Rel.38395n
Hardware Version: TD-8810 0000 0000

This information reflects the current status of your DSL connection.


Line Rate - Upstream (Kbps): 812
Line Rate - Downstream (Kbps): 4446
LAN IP Address: 192.168.1.1
Default Gateway: 220.233.1.152

Is there a minimum required or if it doesnt get any better to be able to pull out of this 1 year deal now?
Because my Telstra 3G connection is 7Mbit which I thought I would get better with ADSL2.

Any thoughts?

Thanks,
Bermo

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 7:03 pm
by Dazzled
About 1.5 mbps is ok by the telcos. ADSL2 speed is line dependent, and speed drops off with line length. What does your modem report for line attenuations and noise margins? Can you estimate the distance to the exchange? Was that a TP-Link? (The settings to use are: user name, password, VPI=8, VCI=35, PPPoE, LLC. Do NOT tick the static IP box)

PS Welcome to the forum.

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 7:26 pm
by Bermo
Thanks for the quick reply.

Using ADSL2Exchanges.com.au:
Line of Sight: 2075 m
Estimated Cable: 2801 m
Estimated Attenuation: 39
Estimated Maximum Speed: 8666

Modem is a brand new TPLink 8810, I have put the latest firmware on it.

Here is the DSL detail

Statistics -- ADSL

Mode: ADSL2+
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 12.3 15.4
Attenuation (dB): 51.0 30.0
Output Power (dBm): 0.0 12.9
Attainable Rate (Kbps): 6052 960
Rate (Kbps): 5471 812
MSGc (number of bytes in overhead channel message): 57 10
B (number of bytes in Mux Data Frame): 58 116
M (number of Mux Data Frames in FEC Data Frame): 4 1
T (Mux Data Frames over sync bytes): 3 1
R (number of check bytes in FEC Data Frame): 10 0
S (ratio of FEC over PMD Data Frame length): 1.3724 4.5659
L (number of bits in PMD Data Frame): 1434 205
D (interleaver depth): 32 1
Delay (msec): 10 1

Super Frames: 2535 2533
Super Frame Errors: 0 32
RS Words: 119822 0
RS Correctable Errors: 25 0
RS Uncorrectable Errors: 0 N/A

HEC Errors: 0 7
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 533103 131497
Data Cells: 621 300
Bit Errors: 0 26

Total ES: 0 0
Total SES: 0 0
Total UAS: 32 56

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 7:37 pm
by Dazzled
You are as expected for a 51 dB line, unfortunately. In the suburbs that would be about 3.7 km long, which differs from the estimate by a large margin. Which is likely to be true? Just in case there is a noise source at home, try running the modem in an isolation test (it, and it only, attached to the phone line by a short cord - remove all other devices and filters and alarms).

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 7:41 pm
by Ravenous
Bermo

For comparitive purposes in order to know what to expect here are my stats which are very similar:

Code: Select all

Statistics	Downstream	Upstream
Line Rate	5063 Kbps	812 Kbps
Attainable Line Rate	5724 Kbps	984 Kbps
Noise Margin	12.0 dB	16.7 dB
Line Attenuation	49.0 dB	25.2 dB
Output Power	0.0 dBm	12.9 dBm

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 8:01 pm
by Bermo
I only have the modem connected as I dont need anything else connected.
I will try the point that is closest to the Telstra Termination point in the house and see if its any better.

I wish I knew this before I got it connected and I would have just gone cable D:

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 8:02 pm
by Bermo
I have an older Billion I will try, is it true that if i keep the modem off for 20mins+ it will force a resync at the exchange end when I reconnect my modem?

Thanks for your help.

Cheers,
Bermo

Re: What is the minimum speed for A/DSL2+ New Connections

Posted: Tue Feb 08, 2011 8:10 pm
by Dazzled
Yes, the long disconnection will restart the port.

If JasonM drops by, he can look up the true line length. If necessary you can email residentialsupport@exetel.com.au for it.

The calculated (attenuated) length seems out of proportion to the crow-flying distance. If your area streets form a rectangular grid (ortho mode for draughtsmen) the line length would be about 2.9 km for an attenuation of about 40 dB, a much happier figure.