ADSL Connections Glance

Have we noticed about the condition of our internet connection? Especially when we use the services based ADSL connection. Perhaps we feel that our connection was slower than connections in other places that use the same service. Before discussing the conditions of our internet connection, it may be useful we need to know first, what is ADSL?

ADSL stands for Asymmetric Digital Subscriber Line which is one of the DSL technology. According to Wikipedia, features of ADSL is its asymmetric, namely that the data transferred in a different speed from one side to the other side.

ADSL is highly influenced by many factors, such as:

1. The distance between the STO with the customer. The farther the distance between the STO with customers will lead to the longer cable needed, so the length of this wire, the greater the resistance / loss of quality ADSL connection.
2. The quality of cable used will also affect the quality of ADSL.
3. The condition of the cable, the more connections the more ugly cable ADSL quality of it.
4. ADSL is very susceptible to interference or electrical induction. So wherever possible we keep the connection cable from power lines.

To find out about the ADSL line, we can immediately see the model of ADSL. Indicators of the quality of an ADSL line can be seen in the SNR Margin and Line Attenuation.

SNR Margin
The higher the SNR Margin value we mean that the quality of the ADSL line, the better.
~ 29.0 dB to top = Outstanding
~ 20.0 dB 28.9 dB = Excellent • The connection is stable.
~ 11.0 dB 19.9 dB = Good • ADSL signal synchronization can take place smoothly.
~ 07.0 dB 10.9 dB = Fair • Vulnerable to variations in network conditions change.
~ 00.0 dB 06.9 dB = Bad • Synchronization signals fail or are not smooth (discontinuous).

Line Attenuation
The lower the value of our Line Attenuation means the quality of the ADSL line, the better.
~ 00.0 dB 19.99 dB = Outstanding
~ 20.0 dB 29.99 dB = Excellent
~ 30.0 dB 39.99 dB = Very good
~ 40.0 dB 49.99 dB = Good
~ 50.0 dB 59.99 dB = Poor • Possible connection problem will arise (not fluent).
~ 60.0 dB to top = Bad • It would appear many distractions connection (signal lost, can not be connected).

Also, keep in mind speed / rate we get, if written 384 / 96, then the maximum bandwidth that's what we get.

From little explanation above, perhaps we can find out about the condition of the internet connection was slow.

There are tips that may be used to slightly "improve" the quality of our ADSL line. Log into the modem, then select advanced then select the ADSL setup then change the modulation mode from ADSL2 + modes to G. DMT mode.

Hopefully useful ...

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Comments  

 

0 # 2010-01-03 18:39

Ada tips yang mungkin bisa digunakan untuk sedikit "meningkatkan" kualitas jalur ADSL kita. Masuk ke dalam modem, kemudian pilih advanced setup kemudian pilih ADSL kemudian ubah mode modulation dari mode ADSL2+ ke mode G.DMT.

iki bukannya kuwalik bos?, kalo G.DMT itu full compability mode kalo gak salah...
kalo di tempatku, mode itu muncul pas kalo snr nya jeblok

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0 # 2010-01-03 22:46

Gini boss network, aku dah nyoba pake mode G.DMT itu, hasilnya SNR nya langsung naik...
Dari beberapa forum juga bilang, kalo pake mode G.DMT, SNR mereka langsung naik, dan di salah satu forum juga bilang (info dari teknisinya), kalau ADSLnya punya kita saat ini, itu modenya pake G.DMT

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0 # 2010-01-07 15:33

Downstream Upstream
SNR Margin : 24.1 35.5 db
Line Attenuation:36.0 14.0 db
Data Rate: 1024 123 kbps

sesudah G.DMT
Downstream Upstream
SNR Margin: 33.5 31.0 db
Line Attenuation:35.0 14.5 db
Data Rate: 1024 128 kbps

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