Verilink DIU 2131 (880-502765-001) Product Manual - Manual (Page 22)

Diagnostics and Troubleshooting
4-2 Verilink User Manual
• Flashing Green:
DIU is accessed by a node controller
thumbwheel switch operator. Both the PORT 1 and PORT 2
STAT LEDs flash green during this time.
• Solid Green for 6 Seconds, then 2 Flashes of Red (repeated):
This
indicates that there is a loss-of-signal on the data port.
• Solid Green for 6 Seconds, then 3 Flashes of Red (repeated):
This
indicates that the DIU 2131 has a low battery. This alarm will
only be displayed by both STAT LEDs.
• Lit Red:
DIU is faulty or problem in equipment connections.
Replace the DIU.
• Lit Yellow:
Associated data channel is under test by an operator
(a test signal is being applied by the DIU).
• Flashing Red:
Power-up self test failure. Could indicate an
incorrect rear connector module has been installed.
• Flashing Red and Yellow:
DIU has failed an operator-initiated data
channel test.
• Not Lit:
DIU is not powered up (power is lost).
Figure 4-1 DIU 2131 Controls and Indicators
213
1
DIU
LOOP
LOOP
STAT
DAT
A
PO
R
T
1
NE
AR
EN
D
FA
R EN
D
LOOP
LOOP
STAT
DAT
A
PO
R
T
2
NE
AR
EN
D
FA
R EN
D
Data Port 1
Loopback and
Status LEDs
Data Port 2
Loopback and
Status LEDs