Alarm, Status And Synchronization Blade; Figure 3-15: Alarm, Status And Synchronization Blade (Sa/M3K) - AudioCodes Mediant 3000 Hardware Installation Manual

3.5

Alarm, Status and Synchronization Blade

The Alarm, Status and Synchronization (SA/M3K) blade is a 6U blade, which is housed in
Slot #2 on the front panel. This blade performs the following functions:

Monitors all midplane voltages (3.3V, 5V, +12V, -12V).

Monitors proper operation of all power supplies.

Monitors and controls chassis temperature by changing the fans' speed according to
the chassis' temperature.

Controls the state of alarm closures.

Controls the front-panel chassis LEDs.

Detects the state of the front chassis push-button.

Detects the availability of the power at the inlet leads.

Provides the clock synchronization for the I/O blades

Interfaces with the Building Integrated Timing Source (BITS) / SETS
The blade interconnects with all chassis elements. Alarms detected are transmitted through
the midplane to the various LED indicators on the chassis and blades, as well as to the
Alarm Terminal Closures on the PEM module.
The SA/M3K blade provides LEDs on its front panel, as displayed below and described in
the subsequent table:

Figure 3-15: Alarm, Status and Synchronization Blade (SA/M3K)

Hardware Installation Manual 34
Mediant 3000
Document #: LTRT-94720