Chapter 6 DSL Testing
Terminating the loop (SELT)
SmartClass TPS User’s Guide
60 22035456, Rev 001 June 2014
Terminating the loop (SELT)
Single End Loop Test (SELT) is used to test a copper loop when there is no equipment installed at
the far end. It is typically used for pre-qualification, that is, testing whether a loop is capable of
supporting DSL service. In some cases, SELT testing is aided by placing a termination at the far
end of the line. This test sets the DSL modem to provide a line termination where the modem is idle
and not transmitting.
To run a SELT termination
1 On the right panel of the SmartClass, connect one end of the test cable to the DSL connector,
and the other end to the line under test.
2 Select DSL Test, and then select xDSL SELT.
After initializing the modem, the SELT verification screen is displayed.
3 The far end technician can continue testing.
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