ugN Gaming
Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
HOME
WEBSITE
SEARCH
LOGIN
SERVER STATS
REGISTER
ugN Gaming
TECHNICAL BOARDS
Technical Support
How does distance from the telephone exchange affect me?
« previous
next »
Print
Pages: [
1
]
Author
Topic: How does distance from the telephone exchange affect me? (Read 2540 times)
KrisiS
Administrator
Administrator
VIP Member
Posts: 2025
Reputation: 43
VIP MEMBER:
How does distance from the telephone exchange affect me?
«
on:
March 03, 2011, 11:32:11 AM »
How does distance from the telephone exchange affect me?
Background
ADSL broadband is dependent on the electrical characteristics of your telephone line. Or to explain it another way, the operation of ADSL is affected by the amount of 'noise' on your line. This noise is not necessarily audible when you make a telephone call, but it can have a detrimental effect on a digital service such as broadband.
As a rule of thumb, the further you are from your exchange - i.e. the longer the physical length of the cabling between the exchange and your premises - the more 'noisy' your line is likely to be. However, noise can also come from other sources such as interference from electrical equipment within your premises or even from the house or office next door.
Until recently, the ability to order broadband was restricted to premises which were no further than 6km (in terms of cable length) from their exchange. This was judged to be a 'safe' distance where noise levels would be unlikely to affect the provision of broadband service. The only restriction was that lines between about 3.5km and 6km long would not be able to support the higher speed services.
A series of trials has shown that it is now possible to provide broadband on lines with much higher levels of noise, albeit subject to certain restrictions.
The main restriction on very long lines is again the speed of product you are able to order - it all comes down to the level of noise on your line.
Noise is measured in decibels (dB). Generally, lines that have noise of less than 43dB are able to receive all speeds of products (i.e. up to 8Mb). When the noise levels go above 43dB you are unlikely to be able to receive the higher speed service.
Once they go above 60dB, there is a possibility that you will not be able to receive broadband at all.
Line Attenuation
This is a measure of how much the signal has degraded between the DSLAM and your modem/router, and is largely a function of the distance from the exchange (bigger distances mean higher attenuation). Maximum signal loss recommendation is usually about 60dB. The lower the dB the better for this measurement.
*
20dB
and below is outstanding
*
20dB-30dB
is excellent
*
30dB-40d
B is very good
*
40dB-50dB
is good
*
50dB-60d
B is poor and may experience connectivity issues
*
60dB
or above is bad and will experience connectivity issues
Note:
From a user perspective, there very little you can do to change the line attenuation of your current connection.
How does distance affect broadband?
At long range, noise on the copper wire makes it harder to get maximum data performance. For ADSL, the maximum range for 2Mbps downloads is 3.5km. For 1Mbps it is 6.0km. In theory all connected customers would be able to receive at least 512kbps downloads. In practice around 5% of customers will not be able to achieve even this level of performance. SDSL suffers from even more severe distance limitations.
My distance from the active Exchange is :
8km
Line Attenuation is:
63/31 db
Logged
The sword guarantees ownership of the pen!
humanxlemming
Guest
Re: How does distance from the telephone exchange affect me?
«
Reply #1 on:
March 19, 2011, 01:14:57 AM »
Do you know of any programs or apps that I could test the connection with besides speedtest/pingtest.
Logged
Print
Pages: [
1
]
« previous
next »
ugN Gaming
TECHNICAL BOARDS
Technical Support
How does distance from the telephone exchange affect me?