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liuyanbiao

81 posts

Master Geek


#55423 4-Jan-2010 11:18
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I just changed my modem to Thomson ST536V6 and I was hoping I would be enjoying the ADSL2+ speed.

However I just found out that this ADSL2+ modem is actually running on ADSL2 rather than ADSL2+.

I have reset the modem but it still on ADSL2 Only..

any idea?
---------------------------------------------------
Link Information













Uptime:
0 days, 12:19:00





DSL Type:
G.992.3 annex A





Bandwidth (Up/Down) [kbps/kbps]:
938 / 4.814





Data Transferred (Sent/Received) [kB/kB]:
0,00 / 0,00





Output Power (Up/Down) [dBm]:
12,0 / 19,5





Line Attenuation (Up/Down) [dB]:
27,0 / 43,5





SN Margin (Up/Down) [dB]:
12,0 / 12,0





Vendor ID (Local/Remote):
TMMB / BDCM





Loss of Framing (Local/Remote):
0 / 0





Loss of Signal (Local/Remote):
0 / 0





Loss of Power (Local/Remote):
0 / 0





Loss of Link (Remote):
0





Error Seconds (Local/Remote):
0 / 0





FEC Errors (Up/Down):
0 / 2.146





CRC Errors (Up/Down):
0 / 2





HEC Errors (Up/Down):
6.497 / 2




---------------------------------------------

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grant_k
3539 posts

Uber Geek

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  #286823 4-Jan-2010 11:29
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From the figures posted above, in particular Downstream Line Attenuation of 43.5dB, it looks as though you are too far from the exchange to get the benefit of ADSL2 or ADSL2+. In fact, you are not even syncing at full ADSL1 speed.

Downstream Line Attenuation of 43.5dB implies that you are around 3.1km from the exchange, which is much too far to get the benefit of ADSL2/2+.

Sorry to tell you what you don't want to hear...

Apart from distance, your line appears to be otherwise OK.  S/N margin of 12dB means the following:

11dB-20dB. = Good with little or no synchronisation problems

So, apart from slower speed, you should have a reliable link, which is the most important thing really.

 
 
 

You will find anything you want at MightyApe (affiliate link).
nzbnw
2371 posts

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Spark NZ

  #286826 4-Jan-2010 11:35
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To check when or if your area is due for an ADSL2+ cabinet visit:


http://www.telecomwholesale.co.nz/maps


nzbnw







liuyanbiao

81 posts

Master Geek


  #286830 4-Jan-2010 11:46
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thanks....

bad news!!
"
This address is scheduled to be connected to a roadside cabinet using faster broadband equipment (ADSL2+ technology) by Sep 2011. "

2011????

so that is why I am still on adsl2 not adsl2+?

I thought I would be still on ADSL2+ just same speed as ADSL



nzbnw
2371 posts

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Spark NZ

  #286831 4-Jan-2010 11:47
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You're getting ADSL1 speeds, not ADSL2 or ADSL2+.

nzbnw







liuyanbiao

81 posts

Master Geek


  #286833 4-Jan-2010 11:53
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grant_k: From the figures posted above, in particular Downstream Line Attenuation of 43.5dB, it looks as though you are too far from the exchange to get the benefit of ADSL2 or ADSL2+. In fact, you are not even syncing at full ADSL1 speed.

Downstream Line Attenuation of 43.5dB implies that you are around 3.1km from the exchange, which is much too far to get the benefit of ADSL2/2+.

Sorry to tell you what you don't want to hear...

Apart from distance, your line appears to be otherwise OK.  S/N margin of 12dB means the following:

11dB-20dB. = Good with little or no synchronisation problems

So, apart from slower speed, you should have a reliable link, which is the most important thing really.



Thanks Grant!!

yes..my adsl is always stable..even with the d-link 302G before and now with thomson st536v6.
(my friend give me st536v6 as a gift!!!Surprised..so no cost for that!!!)

I have been told before that even I upgraded my modem, the speed wont increase much as my home is too far away from the exchange.

but I am still hoping I am still on the ADSL2+ dsl type. now I am just worried about if I have configured my modem correctly.

so....

if telecom put a new cabinet around my house in 2011, my modem will regconise it automatically and operating on ADSL2+ ?

Tongue out

liuyanbiao

81 posts

Master Geek


  #286834 4-Jan-2010 11:54
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nzbnw: You're getting ADSL1 speeds, not ADSL2 or ADSL2+.

nzbnw


yes..I am getting ADSL1 speed...

just dont know why the modem automatically regonise it as ADSL2

not ADSL1 or ADSL2+


Yell

grant_k
3539 posts

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Trusted

  #286889 4-Jan-2010 14:24
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liuyanbiao: if telecom put a new cabinet around my house in 2011, my modem will regconise it automatically and operating on ADSL2+ ?
Tongue out

Yes, you won't have to do anything.  Your modem will re-sync. at the increased speed once the cabinet has been installed.

As you have noticed, your modem is already operating in ADSL2 mode.  But your sync. speed is only equivalent to about 60% of the maximum ADSL1 speed because of the distance.

As soon as the distance is reduced (with installation of a roadside cabinet), your modem will automatically switch to ADSL2+ mode and take advantage of the increased speed available.



Ragnor
8091 posts

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Trusted

  #287054 4-Jan-2010 23:51
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Here's a slightly modified version of a graph from an Australian ISP Internode that explains the relationship between "expected" sync speed and line attenuation.

Basically more distance = higher line attenuation
Worse wiring = higher line attenuation

Higher line attenuation = lower sync speed


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