Cabletron Systems 9A000 manual SFCS-1000 Common Equipment Card CEC, 3-19, AL1AL2, Switch Hardware

Switch Hardware

3.2.7 SFCS-1000 Common Equipment Card (CEC)

The CEC provided with the SFCS-1000 performs several functions. Because each SCP contains an Ethernet port, a major function of the CEC is to provide a single, unified Ethernet port connection for all of the SCPs. The CEC is also responsible for monitoring the environmental conditions of the switch and reporting this information to the SCPs. The CEC reports conditions such as malfunctioning fans, overheated power supplies, and an overheated enclo- sure.

3.2.7.1CEC Front Panel

The front panel of the SFCS-1000 CEC includes the following features: alarm relay contacts, CEC status LEDs, and an Ethernet port with four LEDS. These features are illustrated in Figure 3.9. Refer to the following subsections for detailed descriptions of these features.

AL1 AL2

AL1

AL2

RX LI

COL

POL ETH

Figure 3.9 - CEC Front Panel Status Indicators

3.2.7.2Alarm Relay Contacts

Pins 1 and 2 are the contacts for AL1, and pins 3 and 4 are the contacts for AL2. Although the pins are not actually labeled on an SFCS-1000 CEC, they will be referred to as shown in Figure 3.10.

AL1AL2

Pin 1 Pin 2 Pin 3 Pin 4

Figure 3.10 - Alarm Relay Contacts for AL1 and AL2

3-19