Datasheet

Table 8: States for the M7i Power Supply LED

DescriptionStateColorLabel

Power supply is functioning normally, input is occurring, outputs are within range,

and the temperature is within range.

On steadilyGreenOUTPUT OK

Power supply is not functioning, is starting up, or is not properly inserted, or airflow

is not sufficient.

Blinking

Documentation

Installing an M7i AC Power Supply on page 113•

• M7i Power System Description on page 23

• Replacing an M7i AC Power Supply on page 111

• Troubleshooting the M7i Power System When the LED on One M7i Power Supply Is Off

on page 85

M7i Cooling System Overview

The router cooling system consists of a fan tray, located along the left side of the chassis,

that provides side-to-side cooling (see Figure 18 on page 27). It connects directly to the

router midplane. The fan tray is a single unit containing four individually fault-tolerant

fans. If a single fan fails, the remaining fans continue to function indefinitely.

The fan tray is hot-removable and hot-insertable.

Figure 17: Fan Tray

M7i Airflow Through the Chassis

Figure 18 on page 27 shows airflow through the chassis and the location of the fan tray.

M7i Multiservice Edge Router Hardware Guide