Cisco Systems 1900 Series manual Chassis Ventilation, Real-Time Clock, Chassis Security, Console

Chapter 1 Overview of the Router

Hardware Features

Table 1-4	Summary of Cisco 1900 Series LED Indicators (continued)
LED		Color	Description	Location
EN (RJ-45		Green	The RJ-45 console port is active.	Rear panel,
console port)				next to the
				console
				port
EN (USB serial		Green	The USB console port is active.	Rear panel,
console port)				next to the
				USB
				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 “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 KensingtonTM security slot on the back panel. It can be secured to a desktop or other surface by using KensingtonTM 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.

	Cisco 1900 Series Hardware Installation
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