Cable Forum - View Single Post

Chrysalis · 05-09-2006, 16:11

note the straight line distance still isnt a great way to assume how good service you will get, I got fooled by this before I moved I checked my distance and it was 1.65km on samknows so I thought great should be fine, especially as it was almost half the distance of another guy I know who gets 5mbit.

adsl got activated and it starts at 6000kbit but the noise bursts start and 2 months later I am lucky to get a 4mbit stable rate and bt want me to synch at 3mbit and i still have stability problems. My actual line distance is if I remember right 2.6km and I have an attenuation on 50. I think ofcoms estimation of the real line distance been 1.4 (140%) of crow distance is too low as everyone I know who has reported real vs crow distance is way above 1.4 and this gap seems to increase on longer lines as the line presumably has more diversions en route. On top of this I am told the attenuation for a real length of 2.6 should be alot lower then 50 so looks like another factor on my line has decreased quality probably the cable used.

As a comparison I have my sisters line, their is a exchange for this residental area so as expected the lines are shorter, her crow distance is 700m and the attenuation is 19, I dont know the real distance for this line. If the attenuation is below 43 you should expect at least 8mbit if below 30 it should be a decent number 12+ mbit but is a gamble and if the line turns out poor then as far as BT are concerned its tough luck. Even if a neghbours line is good it doesnt garantuee yours will be.

05-09-2006, 16:11	#9
Chrysalis Inactive Join Date: Sep 2003 Posts: 12,047	Re: Be There Broadband Speed note the straight line distance still isnt a great way to assume how good service you will get, I got fooled by this before I moved I checked my distance and it was 1.65km on samknows so I thought great should be fine, especially as it was almost half the distance of another guy I know who gets 5mbit. adsl got activated and it starts at 6000kbit but the noise bursts start and 2 months later I am lucky to get a 4mbit stable rate and bt want me to synch at 3mbit and i still have stability problems. My actual line distance is if I remember right 2.6km and I have an attenuation on 50. I think ofcoms estimation of the real line distance been 1.4 (140%) of crow distance is too low as everyone I know who has reported real vs crow distance is way above 1.4 and this gap seems to increase on longer lines as the line presumably has more diversions en route. On top of this I am told the attenuation for a real length of 2.6 should be alot lower then 50 so looks like another factor on my line has decreased quality probably the cable used. As a comparison I have my sisters line, their is a exchange for this residental area so as expected the lines are shorter, her crow distance is 700m and the attenuation is 19, I dont know the real distance for this line. If the attenuation is below 43 you should expect at least 8mbit if below 30 it should be a decent number 12+ mbit but is a gamble and if the line turns out poor then as far as BT are concerned its tough luck. Even if a neghbours line is good it doesnt garantuee yours will be.