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1.60KM From Exchnage Only 4.8MB Connection Speed?
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Old 11-06-2007, 15:18   #46
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Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?
Dragon - your modem adds around 3dB of attenuation.
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Old 11-06-2007, 17:17   #47
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Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?
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Originally Posted by Incomplete View Post
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.
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Old 11-06-2007, 20:22   #48
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Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?
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Originally Posted by dragon View Post
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.
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.
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Old 11-06-2007, 22:01   #49
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Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?
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Originally Posted by Incomplete View Post
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.
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
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Old 12-06-2007, 01:35   #50
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Re: 1.60KM From Exchnage Only 4.8MB Connection Speed?
Quote:
Originally Posted by dragon View Post
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.
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Old 12-06-2007, 08:55   #51
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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
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Old 12-06-2007, 09:46   #52
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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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