T320 Router Redundant Cooling System Components
The T320 router cooling system includes:
The cooling system components work together to keep all router components within the acceptable temperature range (see Figure 221). All fan trays and filters are hot-insertable and hot-removable. The two front fan trays are interchangeable. The front and rear fan trays are not interchangeable.
The cooling system has redundant components, which are controlled by the host subsystem. If one of the fans fails, the host subsystem increases the speed of the remaining fans to provide sufficient cooling for the router indefinitely.
The host subsystem monitors the temperature of the router components. When the router is operating normally, the fans function at lower than full speed. If a fan fails, the speed of the remaining fans is automatically adjusted to keep the temperature within the acceptable range. Cooling system components can be removed and replaced without powering down or disconnecting power to the router. Figure 222 shows the T320 router cooling system components.
