Cisco Systems Catalyst 2955 Manual De Usuario
Chapter 4 Installation in a Hazardous Environment
Wiring the External Alarm Device Relays
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Catalyst 2955 Hardware Installation Guide
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On the Catalyst 2955C-12 and 2955S-12 switches, during the initial appearance
of the boot loader prompt on the console after POST, uplink port 13 LED blinks
green, and uplink port 14 LED is off. On the Catalyst 2955T-12 switch, during the
initial appearance of the boot loader prompt on the console after POST, uplink
port 1 LED blinks green, and uplink port 2 LED is off.
of the boot loader prompt on the console after POST, uplink port 13 LED blinks
green, and uplink port 14 LED is off. On the Catalyst 2955T-12 switch, during the
initial appearance of the boot loader prompt on the console after POST, uplink
port 1 LED blinks green, and uplink port 2 LED is off.
Note
POST failures are usually fatal. Call Cisco Systems immediately if your switch
does not pass POST. See the
does not pass POST. See the
.
Note
See the switch software configuration guide for details on the Catalyst 2955
switch password recovery process.
switch password recovery process.
After successfully running POST, follow these steps.
Step 1
Turn off power to the switch.
Step 2
Disconnect the cables.
Step 3
Decide where you want to install the switch.
Wiring the External Alarm Device Relays
The alarm relays on the Catalyst 2955 switch are normally open (NO). To connect
an external alarm device to the relays, you must connect two relay contact wires
to complete an electrical circuit. Because each external alarm device requires two
connections to a relay, the Catalyst 2955 switch supports a maximum of two
external alarm devices.
an external alarm device to the relays, you must connect two relay contact wires
to complete an electrical circuit. Because each external alarm device requires two
connections to a relay, the Catalyst 2955 switch supports a maximum of two
external alarm devices.