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Cisco 860 Series and Cisco 880 Series Integrated Services Routers Hardware Installation Guide
OL-16193-01
Chapter 1 Product Overview
Hardware Features
Memory
The Cisco 860 series and Cisco 880 series routers contain flash memory and main memory.
Flash Memory
The Cisco 860 series and Cisco 880 series ISRs use non-upgradable flash memory storage. Onboard
flash memory contains the Cisco
IOS software image, boot flash contains the ROMMON boot code, and
quack contains the cookie configuration.
The default flash memory for the Cisco 860 series and Cisco 880 series ISRs is 128 MB. The default
flash memory for the Cisco
880 series voice routers is 256 MB.
Note Flash memory is not upgradable. An external USB flash may be used if additional flash memory is
needed.
Main Memory
The Cisco 860 series and Cisco 880 series routers contain 256 MB of onboard CPU memory. The
Cisco
880 series routers contain a SODIMM expansion slot that accommodates a single PC2-4200,
256
MB or 512 MB double data rate 2 (DDR2) small-outline DIMM (SODIMM), for a maximum of 768
MB.
USB Port
A Universal Serial Bus (USB 1.1-compliant) port is located on the front panel. The USB port provides
connection for USB devices such as security tokens and flash memory.
Fan
Some router models do not have a fan, while others have either one or two fans.
The fans spin at full speed, as a diagnostic aid, immediately after the router is powered up. After the
router has booted, the fans will spin continuously at a speed determined by a variable-speed controller.
The fans spin only as fast as necessary to minimize fan noise while maintaining a safe internal operating
temperature.
Power over Ethernet Module
The 2-port Power over Ethernet (PoE) module provides power to 802.3af compliant devices connected
to FE port 0 and FE port 1.
The 2-port PoE module is an option available only for the Cisco 880 series ISRs, and requires a 48 V
external power adapter.