ADTRAN Total Access 3000 DSLAM Installation And Maintenance Practice page 106

Total Access 3000 DSLAM DS3 Primary Switch Module Installation and Maintenance Practice
Table 57. DS3 Loopbacks Menu Options (Continued)
Option Description
7 LIU Digital Local Loopback
8 LIU Analog Local Loopback
96
Function
This option is used to perform an LIU Digital Local Loopback
test. This test sends a loopback toward the loop ports at the
digital side of the LIU.
This option is used to perform an LIU Analog Local Loopback
test. This test sends a loopback toward the loop ports at the
analog side of the LIU.
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