Infomation about line...

Forums › New Zealand Broadband › Infomation about line...

NZHawk

16 posts

Geek

# 19442 17-Feb-2008 14:38

Hi, I have been reading around about all different things to make sure my line is optimized for the internet....attenuation and syncing... I have a Dlink 504T, how do i know that it is optimized. I am also with xtra's GoLarge plan.

I found the line stats

http://img523.imageshack.us/img523/5483/dfdfru3.th.jpg

Thanks in advance.

cyril7

6678 posts

Uber Geek
+1 received by user: 547

Trusted

Subscriber

# 111181 17-Feb-2008 15:26

Image is way too small to see, just type the numbers up

Cyril

itxtme

1668 posts

Uber Geek
+1 received by user: 283

Subscriber

# 111187 17-Feb-2008 15:48

http://img523.imageshack.us/img523/5483/dfdfru3.jpg

NZHawk

16 posts

Geek

# 111188 17-Feb-2008 15:51

ok sorry didn't realise.

I am just testing different phone lines in my house.

One place is...

SNR Margin             16dB Down       28dB Up
Line Attenuation      10dB Down       5dB Up
Data Rate               7616kbps Down 160kbps Up

The New place that im am just testin the stats are slightly different...

SNR Margin             19dB Down       24dB Up
Line Attenuation      8dB Down       5dB Up
Data Rate               7616kbps Down 160kbps Up

Although both say i get 7616kbps i have never got that fast. Its usually 3.6mbps.

cyril7

6678 posts

Uber Geek
+1 received by user: 547

Trusted

Subscriber

# 111208 17-Feb-2008 16:49

You are obviously only 600-800meters from the switch, I does not go any faster than that, if there is an issue it will be that the backhaul to your switch is limiting throughput. You will find most folk in NZ never get more than 4-5MB/s depending on capacity to the individual exhange, even though you connect at 7.6Mb/s which is as fast as ADSL will go.

Dont think there is any other optimisation, other than moving to a full up load plan as the 160kb/s currently may be slowing through put due to the speed that acks are sent.

Cyril

NZHawk

16 posts

Geek

# 111209 17-Feb-2008 16:54

i have been testing speeds with different phone ports around the house, all of which give different rates and stuff. the fastest port..for the first time i was getting 7.2mbps!

SNR Margin             15dB Down       24dB Up
Line Attenuation      11dB Down       5dB Up
Data Rate               7616kbps Down 160kbps Up

Is there anyway to change the sync speed on the dlink 504t? because i woulnt mind giving that a try....

Thanks!

cyril7

6678 posts

Uber Geek
+1 received by user: 547

Trusted

Subscriber

# 111212 17-Feb-2008 17:03

Because you are so close to the DSLAM/ISAM any minor variation in line condition is still less than what is needed to achieve full sync speed. Basically your modem is going as fast as it can go, even when you degrade the signal slightly it still is good enough for the modem to sync at full speed.

That said you still need filters on all your POTS devices to prevent them from loading the line and to keep DSL noise out of your phones.

Cyril

NZHawk

16 posts

Geek

# 111217 17-Feb-2008 17:22

Ok thanks for the info! So i dont really need to change anything... Ok will ahve to move all routers to that goo port then! Ha!

Thanks for all your help!

Will

matt1553

20 posts

Geek
+1 received by user: 2

# 112028 21-Feb-2008 10:31

This has been discussed many times before. Your download speed is being limited by your 128k upload speed. UDP connections that don't need to send ACKs will be close to 7mbit, but anything using TCP/IP will be limited to about 4mbit because of the way the windows networking stack works. Upgrading to a full speed upload and download plan will see you getting something like 6800k down and 750k up.

alco

8 posts

Wannabe Geek

# 112047 21-Feb-2008 11:33

Using a different modem could make a difference? I'm connected to the Takapuna exchange, even though my connection speed has dropped a megabit in the last 3 months, I can still peak at around 600k/sec when using a NetGear GT834GT modem\router.

cyril7

6678 posts

Uber Geek
+1 received by user: 547

Trusted

Subscriber

# 112050 21-Feb-2008 11:45

Yep, Im on a FS/160 plan and my modem syncs at around 5.6Mb/s, my XP machines never seem to haul better than 3.5Mb/s where as my Linux machines can all easily achieve around 4.5Mb/s, and I put this down to the better TCP stack and dynamic buffer windowing.

For my link I doubt I will see much better DL performance by going to FS/FS as the down stream is not fast enough for the uplink increase to make a diff, if I have full DL (ie 7.6) then I might concider the cost worth it.

Cyril