Reduction in speed - any suggestions

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jonathan18

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Topic # 59674 9-Apr-2010 05:57

jonathan18

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Reply # 316404 9-Apr-2010 06:07

Accidently pressed enter before typing text and now a bloody fault won't let me delete the thread or accept my edited post, so have had to place it here!

Hi there

We've been with Slingshot for broadband for about three months. While initially we were getting download speeds of typically between 5-6.5 MB/sec, this has now reduced to between 2.5-3 MB/sec (figures according to speedtest.net). This is occuring on more than one computer in the house as well, with some wireless and others connected to the network by ethernet cable.

If it's relevant, we are on their "everyday" plan (FS down/128kps up). I know it's been suggested we'd get faster speeds moving to a FS up plan, but the fact is we were getting decent speeds with the current plan - just not anymore!

I'd really appreciate any suggestions as to what may be causing the recent slowdown and what I can do about it.

Many thanks
Jonathan

johnr

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Reply # 316415 9-Apr-2010 08:08

Remember its the school holidays so extra load on networks

raytaylor

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Reply # 316693 10-Apr-2010 00:15

Because with a 128k upload you are limited to 4mb download, i wouldnt worry about ever getting anything more in the future. The fact you had over 5mb down in the past is pure luck and something that i dont think many would be able to work out so i hate to have to say it but dont expect to get 5mb+ in the future unless you change your plan.

Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

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raytaylor

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Reply # 316697 10-Apr-2010 00:29

Oh there has also been a general slow down (well a few of us have noticed) in the last couple of weeks

Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

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Ragnor

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Reply # 316698 10-Apr-2010 00:32

Checked the modem's admin ui to see what speed it's sync'ing at, what line attenuation is like and if there are any errors?

die4once1

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Reply # 319792 17-Apr-2010 23:02

You can only get 4mbps with 128k upload.

Talkiet

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Reply # 322055 23-Apr-2010 12:42

die4once1: You can only get 4mbps with 128k upload.

This is an oft repeated response to people on 128k up plans but it's simply factually wrong.

You MAY get lower downstream performance on a 128k upstream plan than on a FS/FS plan, BUT it's a simple fact that 128k up is enough for 9.xMbits of downstream performance, even with TCP, on modern, properly configured OSes.

Someone is about to jump in and say "Oh but in the real world you only get 4mbps" and they too are wrong, I regularly was able to get sustained 8mbps off a plan with a 128k uplink.

Don't blame 128k up for the difference between 5-6mbps and 2-3 mpbs as the OP is concernred about.

Cheers - N

jonathan18

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Reply # 322289 24-Apr-2010 07:22

Thanks for all the replies.

I have to say the last reply makes sense in that I WAS getting those higher speeds on the same FS/128 plan!

Anyway, I'm still getting those slower speeds and at any time of the day/night. I've copied the various figures off the modem and have pasted them below if this assists in diagnosis - I'm just not what sure I should be looking for in things like line attenuation! Please note - the one test that shows as a "fail" has always done so, even when we had the high speeds.

Any futher ideas greatfully received!

Cheers
Jonathan

Line Rate - Upstream (Kbps):
166

Line Rate - Downstream (Kbps):
9856

Device Info -- Statistics -- ADSL

Mode:
ADSL2+

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Line Coding:
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Status:
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Link Power State:
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Downstream
Upstream

SNR Margin (dB):
12.3
40.7

Attenuation (dB):
25.0
12.2

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11.7

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9860
945

Rate (Kbps):
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166

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MSGc (number of bytes in overhead channel message):
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14

B (number of bytes in Mux Data Frame):
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M (number of Mux Data Frames in FEC Data Frame):
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16

T (Mux Data Frames over sync bytes):
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9

R (number of check bytes in FEC Data Frame):
12
16

S (ratio of FEC over PMD Data Frame length):
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5.8182

L (number of bits in PMD Data Frame):
2743
66

D (interleaver depth):
128
8

Delay (msec):
11
11

Super Frames:
672232
672230

Super Frame Errors:
6
38

RS Words:
121001826
2856977

RS Correctable Errors:
12284
1675

RS Uncorrectable Errors:
136
N/A

HEC Errors:
6
3674

OCD Errors:
0
0

LCD Errors:
0
0

Total Cells:
252273031
2798765519

Data Cells:
200014
51476587

Bit Errors:
0
214963

Total ES:
11
374

Total SES:
7
358

Total UAS:
14
145063

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CarlosTheJackal

16 posts

Geek

Reply # 325285 30-Apr-2010 14:56

What modem are you using & how old is it? If it's the free one that came from slingshot then I'd throw it in the bin. We had no end of trouble from our free dynalink. It was so slow & dropped out all the time. I upgraded to a Thomson TG585-v7 which I pick up of TM for $50 & it's been the best modem I've ever used. It never drops out & we get 20mbps DL on speedtest (yes I know it's only within NZ).