Model: CISCO1921/K9, Cisco 1921 Router ISR G2
Detail: Cisco 1921 Modular Router, 2 GE, 2 EHWIC slots, 512DRAM, IP Base
Categories: ,


Overview (CISCO1921/K9)

The Cisco 1921 Router, which Memory and Flash Memory can’t upgrade, is designed for branch offices.

Quick Specs

Figure 1 shows the front view of Cisco Router 1921/K9.

Table 1 shows the Quick Specs of the CISCO1921/K9.

Product Code CISCO1921/K9
Rack Units 1U
Interfaces 2 integrated 10/100/1000 Ethernet ports: GE0/0&GE0/1
Expansion Slot(s) 2 enhanced High-Speed WAN Interface Card (EHWIC) slots
RAM 512 MB/512 MB
Flash Memory 256 MB/256 MB
Dimensions 1.75 x 13.5 x 11.5 in.
Package Weight 5.41 Kg

Product Details

Figure 2 shows the statue LEDs, on the front panel of the 1921/K9, including three statues: SYS, ACT and PoE.

Table 2 shows the front panel LED area description.

LED Color Description
SYS Solid green Solid green indicates normal operation.
Blinking green System is booting or is in ROM monitor mode.
Amber System error.
Off Power is off or system board is faulty.
ACT Green Solid or blinking when any packets are transmitted or received on any WAN or LAN, or when monitoring system activity.
PoE Green PoE is available.
Amber Power supply is not supplying PoE power.

Figure 3 shows the back panel of the CISCO1921/K9.

① Flash LED  ② EN (USB serial console port)  ③ EN(RJ-45 console port) ④ S (Speed) ⑤ L (Link) ⑥ Baud reset ⑦ Ground connector  ⑧ On/Off switch ⑨ USB port ⑩ Kensington security slot

Table 3 shows the back panel LED area description.

LED Color Description Location
Flash LED Green Blinking means software is accessing the internal USB Flash (eUSB) device. Back Panel
Amber Initialized with error.
EN (USB serial console port) Green The USB console port is active. Back Panel
EN(RJ-45console port) Green The RJ-45 console port is active. Back Panel
S (Speed) 1 blink + pause GE port operating at 10 Mb/s. Back Panel
2 blink + pause GE port operating at 100 Mb/s.
3 blink + pause GE port operating at 1000 Mb/s.
L (Link) Green GE link is established. Back Panel
Off No GE link is established.

Figure 4 shows the ports and slots on the back panel of Cisco 1921/K9.


① EHWIC slot ② Auxiliary port ③ GE 0/0(down)and 0/1(up) ④ Input power connector ⑤ USB serial port ⑥ RJ-45 serial console port ⑦ USB port ⑧ POE

* Cisco 1921/K9 supports 1 integrated EHWIC slots for flexible configurations. It supports two modules:

1. 1 double wide HWIC-D or single wide EHWIC/HWIC module or 2 single wide EHWIC/HWIC module.
2. High-speed USB 2.0 ports enable another mechanism secure token capabilities and storage.
Figure 5 shows the unboxing view of CISCO1921/K9.

Recommended Cards and Licenses

Table 4 shows recommended EHWIC, HWIC, VWIC cards and licenses for this router.







Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU


Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers





HWIC two routed port Cisco Router High-Speed WAN Interface card


1-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card


2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card



Cisco Voice/WAN Card VWIC3-1MFT-T1/E1


Cisco Voice/WAN Card VWIC3-2MFT-T1/E1


Cisco Voice & WAN T1/E1 interface moudle VWIC3-1MFT-G703


Cisco Voice/WAN Card VWIC3-2MFT-G703



Cisco 1900 IOS License L-SL-19-DATA-K9= Data E-Delivery PAK for Cisco 1900


Security License for Cisco 1900


AppX License with; DATA and WAAS for Cisco 1900 Series

Specification (CISCO1921/K9)

CISCO1921/K9 Specification

Services and Slot Density
Embedded hardware-based cryptography acceleration (IPsec + SSL) Yes
RJ-45 onboard LAN/WAN 10/100/1000 ports 2
EHWIC slots 2
Doublewide EHWIC slots (use of a doublewide EHWIC slot will consume 2 EHWIC slots) 1
Cisco Integrated Services Module (ISM) slots 0
Memory (DDR2 DRAM): Default/maximum 512 MB/512 MB
USB flash memory (internal): Default/maximum 256 MB/256 MB
External USB flash-memory slots (Type A) 1
USB console port (mini-Type B) (up to 115.2 kbps) 1
Serial console port (up to 115.2 kbps) 1
Serial auxiliary port (up to 115.2 kbps 1
Integrated power supply AC and DC power-supply models
Power-supply options POE (external) – on AC models only
Redundant-power-supply support No
Power Specifications
AC input voltage 100-240V ~
AC input frequency 47-63 Hz
AC input current range AC power supply (maximum) (amps) 1.5-0.6
AC input surge current <50A
Typical power (no modules) 25W
Maximum power capacity with AC power supply 60W
Maximum power capacity with PoE power supply (platform only) 70W
Maximum PoE device power capacity with PoE power supply 80W
DC power input 32-60 VDC, 4A, positive or negative, single source
DC input wire size AWG 14 (2.0 mm2)
Safety ground-wire size AWG 14 (2.0 mm2), minimum
Wire terminal (lug) Amp/Tyco No.32957
Overcurrent protection 20A maximum
Physical Specifications
Dimensions (H x W x D) 1.75 x 13.5 x 11.5 in. (4.45 x 34.29 x 29.21 cm)
Rack height 1 rack unit (1RU)
Rack-mount 19 in. (48.3 cm) EIA Optional
Wall-mount (refer to installation guide for approved orientation) Yes
Package Weight 11.9 lb (5.41 Kg)
Weight: With AC power supply (no modules) 6.75 lb (3.06 Kg)
Weight: With PoE power supply (no modules) 7.5 lb (3.4 Kg)
Airflow Back to sides
Environmental Specifications
Operating Conditions
Temperature: 5906 ft (1800m) maximum altitude 32-104°F (0-40°C)
Temperature: 9843 ft (3000m) maximum altitude 32-77°F (0-25°C)
Altitude 10,000 ft (3,000m)
Humidity 10 to 85% relative humidity (RH)
Acoustic: Sound pressure (typical/maximum) 32.99/58.33 dBA
Acoustic: Sound power (typical/maximum) 41.99/67.22 dBA
Transportation and Storage Conditions
Temperature -40 to 158°F (-40 to 70°C)
Humidity 5 to 95% RH
Altitude 15,000 ft (4,570m)
Regulatory Compliance
Safety UL 60950-1CAN/CSA C22.2 No. 60950-1

EN 60950-1

AS/NZS 60950-1

IEC 60950-1

EMC 47 CFR, Part 15ICES-003 Class A

EN55022 Class A

CISPR22 Class A

AS/NZS 3548 Class A


EN 300-386

EN 61000 (Immunity)

EN 55024, CISPR 24


Telecom TIA/EIA/IS-968CS-03

ANSI T1.101

IEEE 802.3

RTTE Directive


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