4-2
Cisco 1900 Series Hardware Installation
OL-19084-02
Chapter 4 Installing and Connecting the Router
Safety Warnings
If you need to remove or upgrade either of these items, follow the procedures given in Installing and
Upgrading Internal Modules and FRUs in Cisco 1900 Series ISRs.

Plug-In Modules

The following components plug into the router chassis:
WAN interface cards (WICs)
Voice/WAN interface cards (VWICs), data mode only
High-speed WICs (HWICs)
Enhanced High-speed WICs (EHWICs)
Compact Flash memory card
If you need to remove or install WICs, VWICs, HWICs, or EHWICs follow the procedures in the
Installing Cisco Interface Cards in Cisco Access Routers. If you need to remove or upgrade the Compact
Flash memory card (1940 series only), follow the procedure in Installing and Upgrading Internal
Modules and FRUs in Cisco 1900 Series ISRs.
Safety Warnings
Note To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information for Cisco 1900 Series Routers document that accompanies your router.
Warning
IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. Use the statement number provided at the end of
each warning to locate its translation in the translated safety warnings that accompanied this device.
Statement 1071
SAVE THESE INSTRUCTIONS
Warning
No user-serviceable parts inside. Do not open.
Statement 1073
Warning
Read the installation instructions before you connect the system to its power source.
Statement 1004
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030