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38 posts


#56812 24-Jan-2010 21:55
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I've just acquired a new modem to replace my WAG160N, which quite likes to overheat, and since I'd heard so many good things about the XH9949 I went and purchased one. However the new modem has huge troubles reaching the same sync speed as my old one could (3.2M compared to 0.5M with the DSE one).

The DSE has the following line stats:


SNR Margin (dB):

Attenuation (dB):

Output Power (dBm):

Attainable Rate (Kbps):

Rate (Kbps):

Whereas the WAG160N reports:

--- DSL Information ---
DSL Driver Version:  AnnexA version - A2pB022g.d20e
DSL VPI/VCI:         0/100
DSL Status:          ShowtimeRetrain Reason:    8000
DSL Mode:            ADSL2+
DSL Channel:         FAST
DSL Upstream Rate:   934 Kbps
DSL Downstream Rate: 3217 Kbps

                      Down         up   
DSL Noise Margin:    12.0 dB      12.1 dB
DSL Attenuation:     53.0 dB      27.3 dB
DSL Transmit Power:  17.9 dBm     12.4 dBm

Both are set to ADSL2+, and I reside in Mangere Bridge, Auckland, so there is a bit of distance to the exchange (Onehunga).

Basically I just want to ask is the DSE one faulty or am I expecting too much from it?

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263 posts

Ultimate Geek


  #292760 24-Jan-2010 22:11
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That attenuation is very high hence your poor speeds. Apart from the change of box did you change your cables or filters or anything?

38 posts


  #292785 24-Jan-2010 23:10
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paul151: That attenuation is very high hence your poor speeds. Apart from the change of box did you change your cables or filters or anything?

Nope, all the same, bar the unit itself. I even went out of my way to climb into the roof and plugged the dse modem directly into our dlink splitter, which made no difference, so i don't think the wiring is the cause of the attenuation, which is a little tangentical.


7331 posts

Uber Geek


  #292832 25-Jan-2010 10:00
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Hi, 77dB is not a usable figure, I suspect you may have a dud/deaf modem I would try swapping it out. That said with an attenuation of 53dB (let asume the WAG got that bit right) you are on a hiding to nowhere, its starting to head down the slippery slope where unpredictable results will alway occur.

I see that your area is due for cabnetisation mid/late this year so I would not expect great things from your connection till then.


38 posts


  #293153 26-Jan-2010 14:37
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Yay final call - dud modem:

Downstream Upstream
SNR Margin (dB): 12.0 12.1
Attenuation (dB): 54.5 27.3
Output Power (dBm): 18.2 12.4
Attainable Rate (Kbps): 3780 927
Rate (Kbps): 3365 927

I got it replaced :D

Thanks for the advice Cyril7 and Paul151, case closed

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