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252 Crocus SHDSL G703 Chapter 12
User manual
Diagnostic tests
12.2.4 Remote digital loop
Initiating the RDL test establishes a digital loop on the remote Crocus SHDSL G703. This loop is compliant
to loop 2 as described in the ITU-T recommendation V.54.
The loop is situated immediately behind the digital part of the remote Crocus SHDSL G703, schematically
represented as follows:
Make sure that on the remote Crocus SHDSL G703 the rdlDetect attribute is set to enabled (refer to 6.6 -
DTE Interface configuration attributes on page 148). Else it is not possible to initiate an RDL test on the
remote.
How to use this test
Example:
Phase
Description
1 Start an RDL-ET test on the local Crocus SHDSL G703.
⇒A digital loop is established on the remote Crocus SHDSL G703 and a test pattern
is sent down the line.
2 Because the remote side is in a digital loop, the test pattern returns to the local Crocus
SHDSL G703.
3 The detector receives this test pattern, and can compare it with the original transmitted
pattern.
⇒The quantity of inconsistencies that might exist between the original and the
returned pattern could be an indication of the line quality.