The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
The Cisco 1900 Series Integrated Services Routers (ISRs) are modular routers with LAN and WAN connections that can be configured by means of interchangeable interface cards and internal service modules (ISMs). The series currently consists of the 1905, 1921, 1941, and 1941W (wireless) models. The 1941W is Wi-Fi CERTIFIED™ and 802.11a/b/g/n-compliant. The modular design of the routers provides flexibility, allowing you to configure your router according to your needs.
This ISR series has new slots that support next generation Enhanced High-Speed WAN Interface Cards (EHWICs), Internal Services Modules (ISMs, 1941 only), and 2 CompactFlash cards (1941 only). Universal serial bus (USB) ports are available for USB devices, and a USB mini Type-B serial console port is available in addition to the RJ-45 console connector.
This chapter provides an overview of the Cisco 1900 series routers and includes the following sections:
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 Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Warning No user-serviceable parts inside. Do not open. Statement 1073
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030
Warning statement 1017 applies to the countries of Finland, Norway, and Sweden.
Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
This section contains views of the front and rear panels of Cisco 1900 series routers, showing the locations of the power and signal interfaces, the interface card slots, and the status indicators.
Figure 1-1 shows the front panel of the Cisco 1905 and Cisco 1921 router. Figure 1-2 shows the back panel connectors on the Cisco 1905 and Cisco 1921 router. Figure 1-3 shows the front panel of a Cisco 1941 wireless router and Figure 1-4 shows the LEDs of the Cisco 1941 router. Figure 1-5 shows the back panel connectors on the Cisco 1941 router.
Figure 1-1shows the front panel of the Cisco 1905 and Cisco 1921 router and LED names.
Figure 1-1 Front Panel of the Cisco 1905, and Cisco 1921 Router
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1.Power over Ethernet (PoE) is available with optional external PoE power supply. 2.Power off the PoE before installing an EHWIC in the Cisco 1905 and Cisco 1921 ISRs. |
Figure 1-2 shows the back panel of the Cisco 1905 and Cisco 1921 with ports and LEDs.
Figure 1-2 Back Panel of the Cisco 1905 and Cisco 1921 Router (1921 shown)
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EHWIC (HWIC, WIC, or VWIC3) slots 0 and 1—slot 0 (Right), slot 1 (Left), or double wide4567 |
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PoE8 |
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5.The 1905 slot 0 (Right) comes with a permanently installed interface card. Only slot 1 (Left) is available. 6.Only 1 EHWIC Gigabit Ethernet Switch can be installed in a 1905 or 1921. 7.See Module Support on Cisco’s Integrated Services Routers Generation 2 http://cisco.com/en/US/prod/collateral/routers/ps10538/aag_c07_563807.pdf for supported modules. 8.Power off the PoE before installing an EHWIC in the Cisco 1905 and Cisco 1921 ISRs. |
Figure 1-3 shows the front panel of a Cisco 1941 wireless router with antennas mounted.
Note The Cisco 1905 comes with a permanently installed EHWIC in slot 0 (Right).
Figure 1-3 Front Panel of the Cisco 1941W Router
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Antenna mounts9 |
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LEDs10 |
9.The antenna mounts are not available on the non-wireless models. |
Figure 1-4 shows the front panel of the Cisco 1941W (without antennas) with the LED names.
Figure 1-4 Cisco 1941 and Cisco 1941W Router LEDs
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Figure 1-5 shows the Cisco 1941 and 1941W back panel with ports and LEDs.
Figure 1-5 Back Panel of the Cisco 1941 and Cisco 1941W Router
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ISM13 or WLAN |
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HWIC slot 1 (EHWIC, HWIC, or WIC)—double wide14 |
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12.See Module Support on Cisco’s Integrated Services Routers Generation 2 http://cisco.com/en/US/prod/collateral/routers/ps10538/aag_c07_563807.pdf for supported modules. 14.The double-wide slot can accommodate a single wide EHWIC, HWIC, WIC, or VWIC (data only), on the left side of the slot. |
The serial number and common language equipment identifier (CLEI) label for the Cisco 1905 and Cisco 1921 router is located on the rear of the chassis. (See Figure 1-6.) The product ID (PID) label for the Cisco 1905 and Cisco 1921 series routers is located on the bottom of the chassis. (See Figure 1-8.) The serial number label for the Cisco 1940 series routers is located on the rear of the chassis on a pull-out tab. (See Figure 1-8.)
Figure 1-6 Serial Number and CLEI Location on Cisco 1905 and Cisco 1921 Routers
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Figure 1-7 PID and Compliance Label on Cisco 1905 and Cisco 1921 Routers
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Figure 1-8 Serial Number, PID/VID, and CLEI Number Location on Cisco 1940 Series Routers
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Note The serial number for Cisco 1900 series routers is 11 characters long.
The Cisco Product Identification (CPI) tool provides detailed illustrations and descriptions showing where to locate serial number labels on Cisco products. It includes the following features:
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:
Table describes the interfaces available on the Cisco 1900 series routers.
Note Either the RJ-45 console port or USB console port may be used. They can not both be used at the same time.
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.
Table 1-2 summarizes the optional modules:
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Cisco 1900 series routers contain the following types of memory:
Table 1-3 summarizes the memory options for Cisco 1900 series routers. The default memory numbers for RAM represent the minimum usable memory. You can install additional RAM in multiples of the default amount, up to the maximum amount on the Cisco 1940 series ISRs. The Cisco 1905 and Cisco 1921 have factory installed, fixed memory modules and no expansion slots.
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Type—Unregistered DIMM (UDIMM) |
Default onboard memory—512 MB non ECC effective with Cisco IOS release 15.5(3) M onwards and 256 MB non ECC for older versions. Maximum memory—512 MB18 |
18.512 MB activation requires memory licensing feature. See the Cisco IOS Software Activation Configuration Guide for details. |
Table 1-4 summarizes the LED indicators that are located in the router bezel or chassis, but not on the interface cards. Not all models have every LED.
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Solid or blinking when any packets are transmitted or received on any WAN or LAN, or when monitoring system activity. |
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On—Radio is connected, SSID19 is configured, signal is being transmitted, and client is associated, but no data is being received or being transmitted. Slow blinking—Radio is connected, SSID is configured, and beacons are being transmitted. Fast blinking—Data is either being received or being transmitted. |
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On—Radio is connected, SSID is configured, signal is being transmitted, and client is associated, but no data is being received or being transmitted. Slow blinking—Radio is connected, SSID is configured, and beacons are being transmitted. Fast blinking—Data is either being received or being transmitted. |
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Blinking—Ethernet link is up and data is either being received or being transmitted. On—Ethernet link is up, wireless access point is communicating with LWAPP controller. Blinking—Ethernet link is up, wireless access point is not communicating with LWAPP controller. |
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Blinking means software is accessing the internal USB Flash (eUSB20) device. |
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Note Do not remove the CompactFlash memory card when this light is on. |
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Note Do not remove the CompactFlash memory card when this light is on. |
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An internal fan provides chassis cooling. An onboard temperature sensor controls the fan speed. The fan is always on when power is applied to the router. Under most conditions, the fan operates at the slowest speed to conserve power and reduce fan noise. It operates at the higher speeds when necessary under conditions of higher ambient temperature. See the “Chassis Airflow Diagram” section.
An internal real-time clock with battery backup provides the system software with time of day on system power up. This allows the system to verify the validity of the certification authority (CA) certificate. The Cisco 1900 series router has a lithium battery. This battery lasts the life of the router under the operating environmental conditions specified for the router, and is not field-replaceable.
Note If the lithium battery in a Cisco 1900 ISR should fail, the router must be returned to Cisco for repair.
Although the battery is not intended to be field-replaceable, the following warning must be heeded:
Warning Dispose of used batteries according to the manufacturer’s instructions. Statement 1015
The chassis of the router is constructed with a KensingtonTM security slot on the back panel. It can be secured to a desktop or other surface by using KensingtonTM lockdown equipment.
The embedded Wi-Fi CERTIFIED™, 802.11a/b/g/n-compliant wireless access point is preinstalled in the router as an optional feature. The Cisco 1900 routers support both autonomous and unified features and network configurations.
The wireless access point does not have an external console port for connections. To configure the wireless device, you must use a console cable to connect a PC to the host router’s console port as described in “Cable Information and Specifications for Cisco 1900 Series Routers,” and then use the Cisco IOS command-line interface (CLI) to access the interface.
Table 1-5 describes the radios and antennas for the wireless routers.
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21.Actual data rate is highly dependent on your wireless environment. |
The Cisco 1905 and Cisco 1921 ISRs have a baud reset button on the back panel. When the button is pressed during power on, ROMMON resets the router to the default console port configuration. If the baud reset button is pressed for longer than 30 seconds, the router defaults to the read-only ROMMON image. The default console port configuration is 9600 baud, 8 data bits, 1 stop bit, no parity, and flow control is set to none.
Each individual interface (port) on a Cisco 1900 series router is identified by a number. The Cisco 1900 series routers contains the following wide-area network (WAN) and local-area network (LAN) interface types:
The numbering format for the slots is interface-type 0/slot-number / interface-number. Table 1-6 summarizes the interface numbering. See Figure 1-5 to identify the slot numbers.
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Note On the Cisco 1900 series router, the numbering format for configuring an async interface is 0/slot/port. To configure the line associated with an async interface, simply use the interface number to specify the async line. For example, line 0/0/0 specifies the line associated with interface serial 0/0/0 on a WIC-2A/S in slot 0. Similarly, line 0/1/1 specifies the line associated with interface async 0/1/1 on a WIC-2AM in slot 1.
Table 1-7 lists the specifications for Cisco 1905 and Cisco 1921 series routers. Table 1-8 lists the specifications for Cisco 1940 series routers.
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1.75 in x 13.5 in x 11.5 in (4.4 cm x 34.3 x 29.2 cm), 1 RU23 height |
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One RJ-45 connector and one USB mini Type B, USB 2.0 compliant. Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200. |
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RJ-45 connector. Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200. |
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One USB Type A, USB 2.0 compliant, 2.5 W (500 mA) max.24 |
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Two RJ-45 connectors (GE0/GE1), Auto-MDIX25 |
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47 CFR, Part 15 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
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UL 60950-1 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
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TIA/EIA/IS-968 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
22.Refer to the Cisco 1900 Series Integrated Services Routers Data Sheet for additional information. 24.480 Mb/s individually, bandwidth is shared when both are used. |
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3.5 x 13.5 x 11.5 in. (8.9 x 34.3 x 29.2 cm), 2 RU27 height |
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One RJ-45 connector and one USB mini Type B, USB 2.0 compliant. Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200. |
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RJ-45 connector. Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200. |
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Two USB Type A, USB 2.0 compliant, 2.5 W (500 mA) max.28 |
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Two RJ-45 connectors (GE0/GE1), Auto-MDIX29 |
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47 CFR, Part 15 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
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UL 60950-1 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
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TIA/EIA/IS-968 For detailed compliance information, see Regulatory Compliance and Safety Information for Cisco 1900 Series Routers. |
26.Refer to the Cisco 1900 Series Integrated Services Routers Data Sheet for additional information. 28.480 Mb/s individually, bandwidth is shared when both are used. |
For compliance information, refer to Regulatory Compliance and Safety Information for Cisco 1900 Series Routers.