Hardware Installation Manual 36 Document #: LTRT-94720
Mediant 3000
3.6 Chassis Cooling System
The device's components are cooled by the Fan Tray module (FM/M3K), located on the
extreme left of the chassis front panel. The Fan Tray module is hot swappable and provides
a handle for quick and easy removal and insertion.
The module is composed of eight fans and a removable Air Filter (AF/3K). The fans are
divided into two independent functional segments to prevent a single point of failure,
providing necessary air flow for each blade in the card cage even if one of the fans or one
segment stops operating. The Fan Tray module sucks air into the chassis using the eight
fans, through a perforated grill located on the chassis' left panel. The incoming air passes
through the Air Filter, whose honeycombed design prevents radio frequency interferences.
The cool air passes over the entire set of blades, cooling each one. The air then exits the
chassis through perforated vents on the chassis' right panel.
The Fan Tray module also provides severity alarm LEDs and an Alarm Cut-Off (ACO)
button on its front panel (for more information, see Section 3.7 on page 23).
Figure 3-16: Fan Tray Module
Blank panels are used to cover all unoccupied slots on the chassis front and rear panels.
These panels are constructed to assist optimal air flow within the chassis. When
implementing the TP-8410 blade in a Simplex mode, Air Baffle panels are also used (see
figure below) to assist in cooling the system. The Air Baffles maintain internal airflow
pressure and ensure the correct operating temperature in the front cage of the chassis.
These panels are installed in slots #3 and #4 in the chassis' front panel.
Figure 3-17: Air Baffle Panel for Unoccupied Front-Panel Slots
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