AT-3624TR/3648TR Installation Manual - Allied Telesis
AT-3624TR/3648TR Installation Manual - Allied Telesis
AT-3624TR/3648TR Installation Manual - Allied Telesis
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Hardware <strong>Installation</strong><br />
LED Displays<br />
<strong>AT</strong>-3600 Series hubs have two types of LED displays:<br />
❑<br />
❑<br />
Hub status indicators show the overall condition of the module.<br />
Port indicators show the condition of each port connection. They<br />
vary with module type; later chapters of this manual give specifics.<br />
Hub Status Indicators<br />
The LEDs shown in Figure 17 appear on the back panel of each <strong>AT</strong>-3600<br />
Series hub.<br />
ST<strong>AT</strong>US<br />
POWER MASTER FAULT<br />
Figure 17: Hub Status LEDs<br />
POWER—Green whenever power is applied.<br />
MASTER— Amber indicates the currently active Master. (Illuminates on<br />
the Master or on the Backup when the Backup has taken over the Master<br />
function).<br />
FAULT—(OFF under normal operational conditions):<br />
❑<br />
❑<br />
Stays red for a very short time while power-on/reset diagnostics are<br />
run; remains continually red if a malfunction occurs during the<br />
diagnostics.<br />
Turns red (on a Master only) if the Master fails; if the Backup<br />
detects a failure of the Master, the Backup takes over the Master<br />
function.<br />
Note<br />
If the Master fails, its software may not be able to turn OFF its own Master<br />
LED; consequently, the Master LED may be illuminated on two modules in<br />
the backplane. In this kind of failure, however, the original Master’s Fault<br />
LED will also be illuminated to indicate the failure.<br />
The <strong>AT</strong>-3612T has additional hub indicators; see Chapter 6 for details.<br />
18