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REVIEW DRAFT—CISCO CONFIDENTIAL
1-3
Cisco 1805 DOCSIS Cable Router Hardware Installation Guide
OL-14661-01
Chapter 1 Product Description
Hardware Features
Cisco Product Identification Tool
The Cisco Product Identification (CPI) tool provides detailed illustrations and descriptions showing
where to locate serial number labels on Cisco products. The tool includes the following features:
• A search option that allows browsing for models by using a tree-structured product hierarchy
• A search field on the final results page which makes it easier to look up multiple products
• Clearly identified end-of-sale products in results lists
The tool streamlines the process of locating serial number labels and identifying products. Serial number
information expedites the entitlement process and is important for access to support services.
The Cisco Product Identification tool can be accessed at the following URL:
http://tools.cisco.com/Support/CPI/index.do
Built-In Interfaces
This section summarizes the interfaces available on the Cisco 1805 cable router:
• Two Fast Ethernet ports (RJ-45 connectors)
• High-speed console and auxiliary ports, up to 115.2 kbps each (RJ-45 connectors)
• One USB port (version 1.1), intended for future use
Memory
The Cisco 1805 cable routers contain the following types of memory:
• SDRAM—Serves two functions. It stores the running configuration and routing tables, and it is used
for packet buffering by the network interfaces. The Cisco IOS software executes from SDRAM.
• Flash memory—Stores the operating system software image, configuration files, and log files,
implemented in an external CompactFlash memory card.
• Boot/NVRAM—Serves two functions. It stores the ROM monitor, which allows you to boot an
operating system software image from flash memory. It also stores the system configuration file and
the virtual configuration register.
Table 1-1 lists the memory specifications for Cisco 1805 cable routers.
Note SDRAM and the flash memory are user upgradable, but the boot or NVRAM is permanently soldered to
the router’s motherboard and is not upgradable.
Table 1-1 Router Memory Specifications
Description Specification
SDRAM 128 MB, expandable to 384 MB; default is 128 MB
Flash memory 32, 64, or 128 MB; default is 64 MB
Boot or NVRAM 2/4 MB flash memory