BT wiring

Question

Hello so after replacing my BT HH4 with my own modem (due to a new wifi router) im noticing my line stats and seeing some odd results. Im 500m from the exchange as the crow flies and if i pace the route to the exchange im maximum 1100m away. However my downsream line rate is 18440bps, attenuation is 23.4dB and SNR Margin is 3.1. Also I am getting a lot of upstream CRC errors, over 65000 this morning. I believe attenuation can be caused not only by distance but connection points too. When the BT line comes into the house it goes to a small square connector block, it then goes to an oval connector block, after that it goes to the NT5E box. Is this 'normal' it seems excessive to have so many cable joins? Can it be slowing my sync which from what i read should be closer to the max 24mbps based on distance?

Answer 1

if you are fed from an outside pole then usually there is a junction box under the eaves then another oval box inside and then on to your NTE5  as long as connections good then that should not increase your attenuation.  if the joints were poor you probably find your phone line noise doing quiet line test  
you are running with the 'new noraml' noise margin of about 3db suggesting line good
with your attenuation it suggests a line length of about 1.7km  
check speed
If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.