ADTRAN 1500 - Manual (Page 3)

61180009L1-5D Issue 4, May 2006 3
2. Hold the Dual LIU by the front panel while
supporting the bottom edge.
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
optional redundancy. For dual operation, only
Dual LIUs of the same 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)
Table 2. Front Panel LEDs
Label Condition Description
A Red
Yellow
Green
Flashing
Off
ON = T1-A in Red Alarm
ON = T1-A in Yellow Alarm
ON = T1-A Active
FLASHING = T1-A in Test
OFF = In Monitor Mode
B Red
Yellow
Green
Flashing
Off
ON = T1-B in Red Alarm
ON = T1-B in Yellow Alarm
ON = T1-B Active
FLASHING = T1-B in Test
OFF = In Monitor Mode
RED Red ON = Monitored T1 in Red Alarm
YEL Yellow ON = Monitored T1 in Yellow Alarm
RCV Red ON = Monitored T1 bipolar or logic error detected
REM Green
Off
ON = Remotely Provisioned (Craft or Network)
OFF = Locally Provisioned (DIP Switches)
TEST Yellow ON = Test Mode Active
MASTER Green
Flashing
ON = Online Unit
FLASHING = Provisioning in progress. Failover not possible.
STATUS Switch Momentary activation cycles through the T1s for monitoring purposes. Activating
the switch for two or more seconds will cause provisioning to toggle between local
and remote.