Turnup - ADTRAN DS3 NIU3 PM Installation And Maintenance Practice

Fuse
The input current is fused at 1.0 amp on each NIU3 PM
and cannot be replaced in the field.
Options
Options for test time out, in-band loopback enable, keep
alive signal, and customer transmit level are available
through the Provisioning menu screen. There are no
hardware options on the NIU3 PM. Framing is automat-
ically detected as the DS3 signal passes through the
unit.
LED Color
STATUS Green
Red
NTWK LOS/AIS Red
Amber
NTWK C-BIT Green
Amber
NTWK M13 Green
Amber
NTWK LBK Amber
CUST LOS/AIS Red
Amber
CUST C-BIT Green
CUST M13 Green
CUST LBK Amber
FUSE ALARM Red
Note: All LEDs off indicates no power or other system malfunction.
61213075L2-5E
Table 2. LED Indications
Status Description
On Normal operation
On Card malfunction (bypass operation enabled)
Off No power
On DS3 signal not present at network interface
On AIS present at network interface
Off DS3 signal present at network interface
On C-Bit framing detected at network interface
Off C-Bit framing not detected at network interface
On C-Bit framing detected, Tx idle
On M13 framing detected at network interface
Off M13 framing not detected at network interface.
On M13 framing detected, Tx idle
Flashing Slow: Network pattern test active
Flashing Fast: Loopback arming
On Loopback toward network enabled
Off Loopback toward network disabled, network pattern test disabled
On DS3 signal not present at customer interface
On AIS present at customer interface
Off DS3 signal present at customer interface
On C-Bit framing detected at customer interface
Off C-Bit framing not detected at customer interface
On M13 framing detected at customer interface
Off M13 framing not detected at customer interface
Flashing Slow: Customer pattern test active
Flashing Fast: Loopback arming
On Loopback toward customer enabled
Off Loopback toward customer disabled, customer pattern test disabled
Off Normal
On Circuit board fuse failed
Issue 5, February 2011

3. TURNUP

When inserted into a housing with power applied, the
LED illuminates red while the NIU3 PM
STATUS
performs a self-test. If the self-test passes, the
LED illuminates green and the remaining LEDs go
through an on/off sequence indicating the NIU3 PM is
online. If the test fails, the
and the host bypass relays will maintain data flow
around the NIU3 PM. Shutdown procedures are not
required.
LED Indicators
LED indicators on the NIU3 PM front panel display
status during normal, trouble, and test operation.
Table 2 describes the LED indicators.
STATUS
LED remains red
STATUS
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