Introduction
32
Model 3088A/I User Manual
4 • Operation
Introduction
Once the Model 3088A/I is properly configured and installed, it should operate transparently. The following
sections describe power-up, reading the LED status monitors, and using the built-in loopback test modes.
Power-up
To apply power to the Model 3088A/I, first be sure that you have read section
“Power input connector”
on
page 15, and that the unit is connected to the appropriate power source. Power up the unit.
LED status monitors
There are ten LEDs that provide feedback on the state of the unit.
Figure 7
shows the location of the front
panel LEDs. Following
figure 7
is a description of each LED’s function.
Figure 7. Model 3088A/I front panel
Power (Green)
The Power LED glows solid during normal operation. At startup, during the POST, the LED blinks once
every second. If the POST fails, the unit does not enter normal operation, and the LED blinks once every
0.4 seconds.
DSL (Green)
The DSL LED glows solid while a DSL link is established. While the DSL link is training, it blinks once every
second.
Link (Green)
When management is enabled on an Ethernet port (S1-5 is set to the ON position, or S1-4 and S1-5 are set to
the OFF position), the Link LED shows that there is an active physical connection to the console. Otherwise,
the Link LED shows an active physical connection to an Ethernet device.
Activity (Green)
The Activity LED shows that there is data being transferred via that Ethernet port. During a software upgrade
procedure, if the Activity LED is on for an unusually long time, there is a problem with the upgrade, and the
device should be restarted. The TFTP server should be checked (normal upgrades take about 10 seconds on a
100mbit link).
Power
DSL Link
Ethernet Port
Activity & Link
