C1-CISCO 1921/K9


  • Model-C1-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.


Modular design

This design allows for reuse of a broad array of existing modules that meet business requirements while making the most of investment protection.

Agile application services

Host Cisco or third-party applications on ISM modules for mission-critical apps at branch offices. Application delivery assurance services support application visibility and control, which prioritizes and optimizes all types of data, voice, and video apps

WAN connectivity

We offer the industry’s widest choices, including WLAN with 802.11a/g/n, T1/E1, T3/E3, 4G/LTE, xDSL, copper, and fiber Gigabit Ethernet

WAN optimization

Get support for router-integrated, on-demand WAN optimization and application acceleration through service modules.

Highly integrated security

We offer a comprehensive suite of VPN technology with IPSec and SSL VPNs and WLAN security support for 802.11i. Get threat defense support through firewall and IPS options, and support for encryption and cloud-based security.

High performance

The 1900 series includes powerful and energy-efficient multicore processors, a multigigabit fabric, and high-performance services modules that can run multiple concurrent services offered in a scalable manner at high throughputs.

SKU: C1-CISCO1921/K9 Category:


Sub Brands


Embedded hardware-based cryptography acceleration (IPsec + SSL)Yes
RJ-45 onboard LAN/WAN 10/100/1000 ports2
EHWIC slots2
Doublewide EHWIC slots (use of a doublewide EHWIC slot will consume 2 EHWIC slots)1
Cisco Integrated Services Module (ISM) slots0
Memory (DDR2 DRAM): Default/maximum512 MB/512 MB
USB flash memory (internal): Default/maximum256 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 kbps1
Integrated power supplyAC and DC power-supply models
Power-supply optionsPOE (external) – on AC models only
Redundant-power-supply supportNo

Power Specifications

AC input voltage100-240V ~
AC input frequency47-63 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 supply60W
Maximum power capacity with PoE power supply (platform only)70W
Maximum PoE device power capacity with PoE power supply80W
DC power input32-60 VDC, 4A, positive or negative, single source
DC input wire sizeAWG 14 (2.0 mm2)
Safety ground-wire sizeAWG 14 (2.0 mm2), minimum
Wire terminal (lug)Amp/Tyco No.32957
Overcurrent protection20A 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 height1 rack unit (1RU)
Rack-mount 19 in. (48.3 cm) EIAOptional
Wall-mount (refer to installation guide for approved orientation)Yes
Package Weight11.9 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)
AirflowBack to sides

Environmental Specifications

Operating Conditions

Temperature: 5906 ft (1800m) maximum altitude32-104°F (0-40°C)
Temperature: 9843 ft (3000m) maximum altitude32-77°F (0-25°C)
Altitude10,000 ft (3,000m)
Humidity10 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)
Humidity5 to 95% RH
Altitude15,000 ft (4,570m)

Regulatory Compliance

SafetyUL 60950-1

CAN/CSA C22.2 No. 60950-1

EN 60950-1

AS/NZS 60950-1

IEC 60950-1

EMC47 CFR, Part 15

ICES-003 Class A

EN55022 Class A

CISPR22 Class A

AS/NZS 3548 Class A


EN 300-386

EN 61000 (Immunity)

EN 55024, CISPR 24




ANSI T1.101

IEEE 802.3

RTTE Directive


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