User's Guide (1.0a)

2-3
Chapter 2: Technical Specifications and Hardware Installation
(D1) Heartbeat LED Indicator
The Heartbeat LED (D1), is located on the front side of the AOC-SIMBL add-on card. It
indicates the functionality and activity of the add-on card. The blinking of the Heartbeat
LED indicates that the AOC-SIMBL add-on card is active. On initial power-up and on
firmware updates, it will take approximately one minute for the heartbeat LED to begin
blinking. See the Table 2-2 below for details.
Table 2-2. Heartbeat LED (D1
State Description
On (Blinking) SIMBL: active
Off SIMBL is not active