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WaffleMakerMan

138 posts

Master Geek


#116907 13-May-2013 17:46
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Hi all I was wondering if anyone could tell me if I could get better speeds if I changed my modem. I think im quite close to the cabinet (like 150m) but my line speed is around 16000. I know thats not slow but if I could get a bit more by making an investment in a better modem that seems worthwhile to me. from what i've read the linksys AM300 isn't blindingly quick...


From the modem stats page:

DSL Status:     UP
DSL Modulation Mode:     G.992.5 (ADSL2+)
DSL Path Mode:     FAST
Downstream Rate:     16104 Kbps
Upstream Rate:     900 Kbps
Downstream Margin:     12 db
Upstream Margin:     12 db
Downstream Line Attenuation:     5
Upstream Line Attenuation:     0
Downstream Transmit Power:     15
Upstream Transmit Power:     12
LOS Errors:     0
        

PVC Connection
                
        
PVC Status:     UP
Encapsulation:     RFC 2364 PPPoA
Multiplexing:     VC
Autodetect:     Disable
VPI:     0
VCI:     100

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sbiddle
29265 posts

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Biddle Corp
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  #816923 13-May-2013 18:19
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If you're really that close if anything it would be your wiring holding you back, not the modem. Without seeing a bitloading graph it's impossible to tell for sure.

At best you might get another 1 - 1.5Mbps or so regardless of what you do.




Ragnor
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  #817124 14-May-2013 00:17
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I have a Linksys AM300, it was one of the first DSL modems to have PPPoA half bridging.

I use a TP Link TD-8840 (the earlier non T version) now instead as I did indeed find the broadcom chipset in the TP Link sync's at ~2Mbit higher than the Linksys (which uses a Texas Instruments chipset), but your your mileage may vary.

Also as Mr Biddle says improving your internal wiring could help a lot too, single Cat5e from the demarc to where the modem is, with a master filter at the demarc if you have phone jacks in use is the order of the day.

 
 
 
 


WaffleMakerMan

138 posts

Master Geek


  #817566 14-May-2013 17:49
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Thanks for the replys, I found my old dynalink RTA 1320 in my e-waste box and gave that a go, It's syncing 18095/1241 Kbps which is about 2mbit higher also :) I might run with this one for a bit and see if its stable, (Changed the capacitors again and added heat syncs) I have a feeling I changed this one in the first place because it was unreliable though lol. The internal wiring is cat5e ( I persume never actually looked at the spec on the cable but looks like it) about 2 years old, Its a single line running to one phone jack, plugging the modem in without anything did get me slightly better results but not enough to justify putting a filter in at the demarc (im Renting). I have a tri splitter at the jack so I can connect an extra ph and the mysky to the line so I guess I have to live with the loss that introduces unless somebody can suggest a better way maybe?

If the RTA 1320 starts playing up again what would be a good option to replace it with running half-bridged to a linksys wrt54g?

And finally do the sync speeds im getting represent about the max you would see realistically on ADSL in the real world?

webwat
2021 posts

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  #821546 18-May-2013 11:46
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WaffleMakerMan: Thanks for the replys, I found my old dynalink RTA 1320 in my e-waste box and gave that a go, It's syncing 18095/1241 Kbps which is about 2mbit higher also :) I might run with this one for a bit and see if its stable, (Changed the capacitors again and added heat syncs) I have a feeling I changed this one in the first place because it was unreliable though lol. The internal wiring is cat5e ( I persume never actually looked at the spec on the cable but looks like it) about 2 years old, Its a single line running to one phone jack, plugging the modem in without anything did get me slightly better results but not enough to justify putting a filter in at the demarc (im Renting). I have a tri splitter at the jack so I can connect an extra ph and the mysky to the line so I guess I have to live with the loss that introduces unless somebody can suggest a better way maybe?

If the RTA 1320 starts playing up again what would be a good option to replace it with running half-bridged to a linksys wrt54g?

And finally do the sync speeds im getting represent about the max you would see realistically on ADSL in the real world?

You mean theres only have 1 outlet with the modem, phones & sky on it? Thats probably next best to having a master filter.

I have my RTA1320 setup as full bridge and all the PPP being done by my netgear router, which now seems less reliable than the Dynalink! So yeah half bridge might be the better way.




Time to find a new industry!


HowickDota
412 posts

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  #821561 18-May-2013 12:30
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What's your snr at? You can probably squeeze a bit more speed out of it by lowering the snr either through telnet or with dmt tools





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