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All FAQs » UK Broadband FAQ » 2. ADSL » 5114

What Tests Are Carried Out On My Line? (#5114)
Before you can get the ADSL service a series of tests have to be carried out on your phone line. This is done to ensure that it is able to cope with the service.

The Following tests are carried out:

    •Phone Line Length
    This is carried out to see how far your phone line is from your nearest telephone exchange. You must be within 3.5km to pass for 1Mbps and 2Mbps products, and within 5.5km for the 512kbps products.

    •Line Loss
    This is carried out to ensure your telephone line is suitable for ADSL. The test checks the quality of your telephone line. To pass you need less than 41dB to pass.

    •Capacitance
    This is also another test carried out to test the quality of your telephone line. To pass you need less than 160nf.

For those getting an engineer installed product there is one more additional test that is carried out:
    •Whoosh Test
    The test looks at the quality of the line across the DSL frequency range and measures how much of the signal reaches your house.


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last modified: 2002-10-11 06:08:43


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