McAfee M3050 - Network Security Platform Guía de instalación descargar pdf (Pagina 23)

McAfee® Network Security Platform 6.0

How dongles work

A group of mechanical relays actually resides between each port pair:

Figure 6: Mechanical Relays

The relays come into play when the Sensor is shut down. Specifically, the relays provide a

path for the signals on pins 1, 2, 3, and 6 to continue to pass when the Sensor is powered

off. In short, the relays ensure that the Sensor will fail open.

It is important to note that the relays provide a path for the signals on pins 1, 2, 3, and 6

only. The signals on pins 4, 5, 7, and 8 are instead filtered out.

When the Sensor runs in inline fail-closed mode, the Sensor uses pins 4 and 5 instead of

pins 1 and 2 to transmit signals:

Figure 7: Tx signals on pins 4 and 5

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McAfee M3050 - Network Security Platform Guía de instalación Pagina 23