1-12
Cisco 1900 Series Hardware Installation
OL-19084-02
Chapter 1 Overview of the Router
Hardware Features
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
“Chassis Airflow Diagram” section on page 4-3
.
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.
Note
If the lithium battery in a Cisco 1900 ISR should fail, the router must be returned to Cisco for repair.
Although the battery is not intended to be field-replaceable, the following warning must be heeded:
Warning
Dispose of used batteries according to the manufacturer’s instructions.
Statement 1015
Chassis Security
The chassis of the router is constructed with a Kensington
TM
security slot on the back panel. It can be
secured to a desktop or other surface by using Kensington
TM
lockdown equipment.
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.
EN (RJ-45
console port)
Green
The RJ-45 console port is active.
Rear panel,
next to the
console
port
EN (USB serial
console port)
Green
The USB console port is active.
Rear panel,
next to the
USB
console
port
1.
SSID = Service Set Identifier
2.
eUSB = embedded USB
Table 1-4
Summary of Cisco 1900 Series LED Indicators (continued)
LED
Color
Description
Location
