The Ethernet controller PCB assembly performs two primary functions. First, you can connect the Cisco RF Switch and a Cisco universal broadband router using a rollover cable connected between the Cisco universal broadband router and the Ethernet controller's RJ-45 receptacle. This connection allows you to remotely control both automatic and manual operations of the Cisco RF Switch by passing SNMP traffic between the Cisco RF Switch and the Cisco universal broadband router. For example, when a cable interface line card on the Cisco universal broadband router experiences a failure or if the Cisco universal broadband router detects a large number of remote Customer Premises Equipment (CPE) devices that have gone offline, an SNMP alert is automatically transmitted to the Cisco RF Switch and a protecting cable interface line card assumes working status for the failed or faulty cable interface line card.