Above are the levels of banding that can be applied to your line by DLM (Dynamic Line Management). Banding is applied when your connection drops on a regular basis. The banding slows your connection by restricting your connection rate. For example, if your connection drops 10 times within 24 hours, you may notice that your connection is banded to WBC 4M-9M this means your connection will only be allowed to synchronise at a maximum of 9728Kbps. Your speeds are lowered to try and help your line stabilise. Normally, your line should be WBC 160K-24M which essentially means, your connection can synchronise anywhere between 160Kbps up to 24576Kbps – this is a profile with no banding on it. In a lot of cases if you have a fault where your connection has dropped out, your profile will be restricted to WBC 160K-288K which means you’ll only see speeds of around 250Kbps.
If the INP value is either 4 or 8, this means the line is chronically banded – meaning that DLM will not be able to remove the banding on the line – it will need an SNR Reset (by an engineer or our Faults Team).
20CN (Up to 6Mb)
There is no line banding on 20CN circuits. The connection speeds are controlled by either increasing the SNR or by restricting the IP Profile. Please see the below table:
Sync speed (incr 32kb stages)
The above table shows the IP Profile’s that are available based on your synchronisation rate. For example, if you have a synchronisation rate of 4500, you will be assigned an IP Profile of 3500 – this equates to around 3.4Mbps.
FTTC (Up to 76Mb)
More, in depth information on how these figures are used in our own internal testing can be found on the Faults Testing guide.