What tests are performed when ADSL or an upgrade is ordered?
BT Wholesale will normally do some checks before activating an ADSL service, these are detailed below. If ordering a Max based product, the only check done is whether the service is available on your exchange, and that you’ve not had your line marked as RED, i.e. ‘unsuitable for ADSL’ due to a previous failed ADSL activation. Edited to match the new limits that come into effect 6th September 2004 • Line Length (They need to know how far you are from the exchange), you must be within ~3.5km to pass for the 2Mbps product, and within approximately 6km for the 1Mbps ADSL products. There is no set limit for a 0.5Mbps service, all but 0.2% of lines should support a 0.5Mbps service.NB: This is related to the length of the line rather than the physical distance from the exchange. • Line Loss (They need to ensure your line has suitable quality for ADSL), You need a line loss of no more than 43db for the 2Mbps product, 60dB for 1Mbps product. This test is normally a paper exercise based around t
