Usb Port - Cisco 881W - Integrated Services Router Wireless Hardware Installation Manual

Hardware Features
The default flash memory for the Cisco 860 series and 880 series routers is 128 MB. The default flash
memory for the Cisco 880 series voice routers and Cisco 890 series routers is 256 MB.
Flash memory is not upgradable. An external USB flash memory module may be used if additional flash
Note
memory is needed.
Main Memory
The Cisco 860 series routers contain 256 MB of onboard memory. The onboard memory in the Cisco 860
series router is not expandable.
The Cisco 880 series routers contain 256 MB of onboard memory and a single memory expansion slot
that accommodates a PC2-4200, 256-MB or 512-MB double data rate 2 (DDR2) SODIMM, for a
maximum of 768 MB.
The Cisco 890 series routers contain 512 MB of DRAM by default (256 MB of onboard memory and a
single memory expansion slot that accommodates a PC2-5300, 256-MB or 512-MB DDR2 SODIMM,
for a maximum of 768 MB).

USB Port

The Cisco 860 series and 880 series routers have a single Universal Serial Bus (USB 1.1-compliant) port
located on the front panel. The USB port provides connection for USB devices such as security tokens
and flash memory.
The Cisco 890 series routers have two USB 1.1-compliant ports located on the front panel.
Fan
Some router models do not have a fan, while other models 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 spin as fast as necessary to minimize fan noise while maintaining a safe
internal operating temperature.
Power over Ethernet Module
The Cisco 880 series ISRs can include an optional Power over Ethernet (PoE) module that provides
power to 802.3af-compliant devices connected to FE ports 0 and 1.
The Cisco 890 series ISRs can include an optional PoE module that provides power to 802.3af-compliant
devices connected to FE ports 0, 1, 2, and 3.
The PoE module is an option available only for the Cisco 880 series and 890 series ISRs and requires a
48-V external power adapter.
Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide
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Chapter 1 Product Overview
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