Model: CISCO1941/K9 Cisco 1941 Router ISR G2
Detail: Cisco 1941 Router w/2 GE,2 EHWIC slots,256MB CF,512MB DRAM,IP Base
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Overview (CISCO1941/K9)

The Cisco 1941 Router, modular router, is designed for branch offices.

Quick Specs

Figure 1 shows the front view of the Cisco Router 1941/K9.

Table 1 shows the Quick Specs of the CISCO1941/K9.

Product Code CISCO1941/K9
Rack Units 2 RU
Interfaces 2 integrated 10/100/1000 Ethernet ports: GE0/0&GE0/1
Expansion Slot(s) 2 enhanced High-Speed WAN Interface Card slots1 Internal Services Module slot
RAM 512 MB (installed) / 2 GB (max)
Flash Memory 256 MB (installed) / 8 GB (max)
Dimensions 34.3 cm x 29.2 cm x 8.9 cm
Package Weight 10.48 Kg

Product Details

Figure 2 shows the statue LEDs, on the front panel of the 1941/K9, including three statues: SYS, ACT and PoE.
Table 2 shows the front panel LEDs area description.

LED Color Description
SYS Solid green Solid green indicates normal operation.
Blinking green The system is booting or is in ROM monitor mode.
Amber System error.
Off Power is off or the 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.


LED Color Description Location
CF 1 Green Flash memory is busy. Back Panel
Amber Initialized with error.
Blinking Green then turns off CompactFlash is ready for removal.
CF 0 Green Flash memory is busy. Back Panel
Amber Initialized with error.
Blinking Green then turns off CompactFlash is ready for removal.
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.
EN (RJ-45 console port) Green The RJ-45 console port is active. Back Panel
EN (USB serial console port) Green The USB console port is active. Back Panel

Figure 4 shows the ports and slots on the back panel of Cisco 1941/K9.


On/Off switch Compact flash 2
HWIC slot 1 HWIC slot 2
Input power connector USB serial port
AUX port GE 0/1
GE 0/0 USB ports
Compact flash 1

·Cisco 1941/K9 supports 2 integrated EHWIC slots for flexible configurations. It supports two modules: 1 double wide HWIC-D or single wide EHWIC/HWIC module or a 2nd single wide E-HIC/HWIC module.

·2 high-speed USB 2.0 ports enable another mechanism secure token capabilities and storage.

·The 1941 has 2 external Compact Flash slots supporting to extend up to 8GB.

Modularity Features

The Cisco 1941 provides significantly enhanced modular capabilities offering investment protection for customers.

Table 4 shows interfaces and modules for this router.

Models Description
ISM-SRE-300-K9 Internal Services Module (ISM) with Services Ready Engine
MEM-CF-256U1GB 256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900
MEM-CF-256U2GB 256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900
MEM-CF-256U512MB 256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR
MEM-CF-256U4GB 256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900
EHWIC-1GE-SFP-CU Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU
EHWIC-4ESG Four-port 10/100/1000 Base-TX Gigabit Ethernet switch interface card  for Cisco 1900 2900 3900 Routers
HWIC-2FE HWIC two routed port Cisco Router High-Speed WAN Interface card
HWIC-1T 1-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card
HWIC-2T 2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card
VWIC3-1MFT-T1/E1 Cisco Voice/WAN Card VWIC3-1MFT-T1/E1
VWIC3-2MFT-T1/E1 Cisco Voice/WAN Card VWIC3-2MFT-T1/E1
VWIC3-1MFT-G703 Cisco Voice&WAN T1/E1 interface module VWIC3-1MFT-G703
VWIC3-2MFT-G703 Cisco Voice/WAN Card VWIC3-2MFT-G703

The Licenses

The Cisco 1941/K9 router supports IOS Technology Package Licenses.

Table 5 shows the models of these licenses.

Licenses Description
L-SL-19-DATA-K9 Cisco 1900 IOS License L-SL-19-DATA-K9= Data E-Delivery PAK for Cisco 1900
L-SL-19-SEC-K9 Security License for Cisco 1900
L-SL-19-APP-K9 AppX License with; DATA and WAAS for Cisco 1900 Series

Compare to Similar Routers

Table 6 shows the comparison between the Cisco 1921 router and the 1941 router.

Model CISCO1921/K9 CISCO1941/K9
Interface w/2 GE 2 GE
EHWIC slot 2 2
SIM Slot 0 1
Memory 512 MB (installed) / 512 MB (max) 512 MB (installed) / 2 GB (max)
Flash Memory 256 MB (installed) / 256 MB (max) 256 MB (installed) / 8 GB (max)
Rack Unit 1U 2U

Specification (CISCO1941/K9)

CISCO1941/K9 Specification

Main Specs
Manufacturer Cisco Systems, Inc
Manufacturer Part Number CISCO1941/K9
Product Type Router
Form Factor External – modular – 2U
Dimensions (WxDxH) 34.3 cm x 29.2 cm x 8.9 cm
Weight 5.8 kg
DRAM Memory 512 MB (installed) / 2 GB (max)
Flash Memory 256 MB (installed) / 8 GB (max)
Routing Protocol OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing
Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet
Network / Transport Protocol IPSec
Remote Management Protocol SNMP, RMON
Features Cisco IOS IP Base, firewall protection, VPN support, MPLS support, Syslog support, IPv6 support, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED)
Compliant Standards IEEE 802.3ah, IEEE 802.1ah, IEEE 802.1ag
Power AC 120/230 V ( 50/60 Hz
Services and Slot Density
Embedded hardware-based crypto acceleration (IPSec + SSL) Yes
Total Onboard LAN 10/100/1000 2
RJ-45-Based Ports 2
SFP-Based Ports 0
SM Slots 0
Double-Wide SM Slots 0
EHWIC Slots 2
Double-Wide EHWIC slots (use of a double-wide EHWIC slot will consume two EHWIC slots) 1
ISM Slots 1 (0 on the Cisco 1941W)
Memory (DDR2 Error Correction Code [ECC] ECC DRAM) – Default 512 MB
Memory (DDR2 ECC DRAM) – Maximum 2.0 GB
Compact Flash (external) – Default slot 0: 256 MBslot 1: none
Compact Flash (external) – Maximum slot 0: 4 GB slot 1: 4 GB
External USB flash memory slots (Type A) 2
USB Console Port (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
Power Supply Options AC, POE
Redundant Power Supply Support No
Power Specifications
AC Input Voltage 100-240 V ~
AC Input Frequency 47-63 Hz
AC Input Current range AC Power Supply (Max) (Amps) 1.5-0.6
AC Input Surge Current <50 A
Typical Power (No Modules) 35 W
Maximum Power Capacity with AC power supply 110 W
Maximum Power Capacity with PoE power supply (platform only) 110 W
Maximum PoE device power capacity with PoE power supply 80 W
Physical Specifications
Dimensions (H x W x D) 3.5 in x 13.5 in x 11.5 in (34.3 cm x 29.2 cm x 8.9 cm)
Rack Height 2 RU
Rack-mount 19in. (48.3 cm) EIA Included
Wall-mount (refer to the installation guide for approved orientation) Yes
Package Weight 23.1 lbs (10.48 Kg)
Weight-with AC power supply (no modules) 12 lbs(5.44 Kg)
Weight-with POE power supply (no modules) 12.8 lbs (5.8 Kg)
Maximum Weight-Fully Configured 14 lbs (6.35 Kg)
Airflow Front to Side
Environmental Specifications
Operating Condition
Temperature-5906 feet (1800 m) max. altitude 0-40°C (32-104°F)
Temperature-9843 feet (3000 m) max. altitude 0-25°C (32-77°F)
Altitude 3000 m (10000 ft)
Humidity 10 to 85% RH
Acoustic: Sound Pressure (Typ/Max) 26/46 dBA
Acoustic: Sound Power (Typ/Max) 36/55 dBA
Transportation/Storage Condition
Temperature -40 – 70 oC (-40 – 158 oF)
Humidity 5 to 95%RH
Altitude 4570m (15000 ft)
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


CNS 13438

EN 300-386

EN 61000 (Immunity)

EN 55024, CISPR 24


Telecom TIA/EIA/IS-968CS-03

ANSI T1.101

ITU-T G.823, G.824

IEEE 802.3

RTTE Directive

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