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4 • Operation and shutdown Model 3120 RAS Getting Started Guide
54 Introduction
Introduction
This chapter describes how to start or power-down the RAS.
Activating the RAS
Once the RAS has been installed, no operator action is required under normal conditions; the RAS is designed
for unattended operation. The RAS does not have a power switch. When either power supply is connected to
power, the RAS will immediately begin its boot-up cycle. However, both power supplies must be connected to
power for the redundancy feature to work.
When power is applied to the RAS the following should occur:
1. The POWER LED illuminates.
2. The Link 1 Frame LED illuminates, indicating that the RAS is synchronizing with the T1/E1/PRI signal.
3. After 5 seconds, the Link A Error LED flashes, indicating that the RAS is satisfied with the quality of the
T1/E1/PRI signal.
4. After 10 seconds, the Link A Error LED extinguishes, indicating that the RAS is satisfied with the network
signal and that the link is ready for use.
5. There are two LEDs on each RAS 10/100 Ethernet port: a green LED that indicates line speed, and a yel-
low LED that indicates link status and activity.
The yellow LED is either flashing yellow (meaning that packets are being received at the Ethernet port) or
solid yellow (meaning that the link is valid but no packets are being received).
The green LED is either lit (indicating 100 Mbps operation) or off (indicating 10 Mbps operation).
Note The green LED reflects the speed of the last valid Ethernet
connection.
The RAS is operational.
De-activating the RAS
Perform the following procedure to deactivate the RAS.
1. Disconnect the male ends of both power cords from the power distribution strip or to a wall outlet.
2. Verify that the POWER LED extinguishes.