ADTRAN Total Access 1500 Dual Line Interface Unit Installation And Maintenance Practice page 3

2. Hold the Dual LIU by the front panel while
3. Align the Dual LIU card edges to the guide
grooved for the slot designated LIU-A.
4. Insert the Dual LIU until the edge connector seats
firmly into the backplane.
5. Push the ejector in place to ensure the Dual LIU is
fully seated.
NOTE
An additional LIU-B slot is also provided for
Dual LIUs of the^ame software revision
should be installed.
When the Dual LIU first powers up it performs the
power up self-tests, which check the DRAM and
checksum. Once the power up self-test is complete, the
status LEDs will reflect the true state of the hardware.
Front Panel LEDs
The front panel LEDs provide status and alarm infor¬
mation. See Table 2 for LED descriptions.
Front Panel Pushbutton
A pushbutton switch labeled STATUS is accessible
from the front panel to aid in test and troubleshooting.
The MONITOR TX and RX bantam jacks are provided
for T1 access.
NOTE
TX = Transmit (Out) and RX = Receive (In)
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