Cable Forum - 1.60KM From Exchnage Only 4.8MB Connection Speed?

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- - 1.60KM From Exchnage Only 4.8MB Connection Speed? (https://www.cableforum.uk/board/showthread.php?t=33614818)

Incomplete

11-06-2007 15:18

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Dragon - your modem adds around 3dB of attenuation.

dragon

11-06-2007 17:17

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Quote:

Originally Posted by Incomplete (Post 34326147)

Dragon - your modem adds around 3dB of attenuation.

fair enough, learn something new everyday ;)

out of interest what does the average dect phone and a Adsl mircofilter do for it

And btw that's on an extension because there's no power socket by the master.

Incomplete

11-06-2007 20:22

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Quote:

Originally Posted by dragon (Post 34326222)

The phone should add nothing, the filter next to nothing.

Can't give you specifics as I can only talk from experience where swapping a cheapo filter for a quality one took a dB of attenuation off, so I'm not going to speculate too much but effect should be minimal as they are there to attenuate the telco frequencies on one port and the DSL ones on another.

dragon

11-06-2007 22:01

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Quote:

Originally Posted by Incomplete (Post 34326344)

I know ;)

I had one in pieces earlier for some reason the electromagnet decided to break off and start rattling around inside it.

Was surprised to find a reed relay in the micro filter :Yikes:

Chrysalis

12-06-2007 01:35

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Quote:

Originally Posted by dragon (Post 34325895)

My line is under 1km here's my particular stats

Code:

        

        Statistics              Downstream        Upstream         

        Line Rate             8128 Kbps                 448 Kbps         

        Noise Margin            10.0 dB                 26.0 dB         

        Line Attenuation  10.0 dB              6.0 dB         

        Output Power          13.8 dBm              11.9 dBm

When i first got Adsl I got a sync speed of 7616, but then i found that was because someone had put interleaving set to ON, had it taken off and my sync speed went up.

Although 10db per 10km isn't correct there's many more factors that can affect loop loss like the quality of the cabling, Number of joints, condition of the joints.etc, The weather.

yep indeed, I expect in some cases it may be possible to get less then 10db per km as well as over.

mmm	12-06-2007 08:55

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

Back to the OP, Either he's connected to a very different exchange than he thinks, or they are using tin cans and wet string for a stretch, I'm a couple of km from exchange by road, attenuation about double that of dragon's

Code:

Modem Status

        

Connection Status                   Connected

Ds Rate (Kbps)                   8128

Us Rate (Kbps)                   448

DS Margin                   9

US Margin                   25

DS Line Attenuation                   20

US Line Attenuation                   11

Trained Modulation                   ADSL_G.dmt

Incomplete

12-06-2007 09:46

Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?

He probably has a very indirect route to the exchange, lots of joints in the cable, perhaps some of those or the cable itself is dicey.

Anyway we cannae change the laws of physics and his line isnt going to get rewired.

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