Cisco LightStream 2020 Installation Manual page 12

Applying System Power
Figure 2-5
Note
system (TCS) applies power to the cards and initiates the power-on self test (POST) sequence. LEDs
on the power tray(s) and the individual cards indicate operational status, as reflected in the flow chart
in Figure 2-6. The power-up sequence, including the POST, takes a minute or less.
Step 3
2-12 LightStream 2020 Installation Guide
LightStream 2020 AC and DC Power Trays
Chassis with
DC power trays
When the LS2020 switch is powered up, the blowers start running and the test and control
If the green ready (RDY) LED on each card lights up (indicating operational status),
proceed to the next section "Installing Modems." If a yellow fault (FLT) LED stays lit on
any card, indicating the existence of a problem, do either of the following:
•
Refer to the LightStream 2020 Hardware Reference & Troubleshooting Guide to
determine why the FLT LED indication occurred and how to correct it.
•
Temporarily remove the faulty card from the LS2020 chassis and bring up the rest of the
system.
Terminal
block
Power
switch
Terminal
block
Power
Chassis with
switch
AC power trays
Power switch
Power inlet
Power switch
Power inlet