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Cisco 1900 Series Hardware Installation
OL-19084-02
Chapter 1 Overview of the Router
Hardware Features
Note Either the RJ-45 console port or USB console port may be used. They can not both be used at the same
time.
Removable, Interchangeable, and Optional Modules
Some modules can be installed either by inserting them into slots on the chassis, or by opening the
chassis and plugging them into connectors inside. The WLAN is factory installed.
• CompactFlash memory and enhanced high-speed WAN interface cards (EHWICs) fit into slots on
the Cisco 1940 series chassis, and can be installed or removed without opening the chassis.
• A connector inside the Cisco 1940 series chassis accommodates an optional field installable Internal
Service Module (ISM). See Installing and Upgrading Internal Modules and FRUs in Cisco 1900
Series ISRs.
• The ISM connector inside the Cisco 1941W chassis accommodates an optional factory installed
wireless LAN card. The WLAN card is permanently installed in the ISM connector.
• Cisco 1940 series ISRs feature an optional upgrade to the internal power supply providing in-line
power (802.3af-compliant Power-over-Ethernet (PoE) and Cisco standard inline power) to optional
integrated switch modules. The Cisco 1905, and Cisco 1921 have an external feed for PoE. (See
Figure 1-2.)
• There are no user-installable or replaceable modules on the Cisco 1905 or Cisco 1921 routers. The
chassis cover should never be removed.
Caution Power off the PoE before installing an EHWIC in the Cisco 1905 and Cisco 1921 ISRs.
Table 1-2 summarizes the optional modules:
Tab l e 1-1 Interfaces Available on the Cisco 1900 Series Routers
Interface Description
Gigabit Ethernet (GE) Two GE ports (RJ-45 connectors).
RJ-45 Console One console port (RJ-45 connector).
Auxiliary One auxiliary port (RJ-45 connectors).
USB console In addition to the RJ-45 Console port, the Cisco 1900 ISRs have a USB
5-pin mini Type-B port. When first connecting to this port, a USB driver
must be installed. You will be prompted to install the driver. Simply
follow the installation prompts to install the driver.
USB Two USB 2.0 Type-A compliant ports;1940 series. One USB 2.0 Type-A
compliant port; 1905 and1921.These ports are backward compatible with
USB1.1 devices. The USB port provides connection for USB devices
such as security tokens and flash memory.