Chassis Ventilation; Real-Time Clock; Chassis Security; Wireless Lan Connectivity - Cisco WS-C1924-A - Catalyst 1900 24 Ports 10MB Switch Hardware Installation Manual

Hardware Features
Table 1-4
LED
EN (RJ-45
console port)
EN (USB serial
console port)
1. SSID = Service Set Identifier
2. eUSB = embedded USB

Chassis Ventilation

An internal fan provides chassis cooling. An onboard temperature sensor controls the fan speed. The fan
is always on when power is applied to the router. Under most conditions, the fan operates at the slowest
speed to conserve power and reduce fan noise. It operates at the higher speeds when necessary under
conditions of higher ambient temperature. See the

Real-Time Clock

An internal real-time clock with battery backup provides the system software with time of day on system
power up. This allows the system to verify the validity of the certification authority (CA) certificate. The
Cisco 1900 series router has a lithium battery. This battery lasts the life of the router under the operating
environmental conditions specified for the router, and is not field-replaceable.
If the lithium battery in a Cisco 1900 ISR should fail, the router must be returned to Cisco for repair.
Note
Although the battery is not intended to be field-replaceable, the following warning must be heeded:
Dispose of used batteries according to the manufacturer's instructions. Statement 1015
Warning

Chassis Security

The chassis of the router is constructed with a Kensington
secured to a desktop or other surface by using Kensington

Wireless LAN Connectivity

The embedded Wi-Fi CERTIFIED™, 802.11a/b/g/n-compliant wireless access point is preinstalled in
the router as an optional feature. The Cisco 1900 series routers support both autonomous and unified
features and network configurations.
Cisco 1900 Series Hardware Installation
1-12
Summary of Cisco 1900 Series LED Indicators (continued)
Color Description
Green The RJ-45 console port is active.
Green The USB console port is active.
Chapter 1
"Chassis Airflow Diagram" section on page
TM
security slot on the back panel. It can be
TM
lockdown equipment.
Overview of the Router
Location
Rear panel,
next to the
console
port
Rear panel,
next to the
USB
console
port
4-3.
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