Does the Cisco 921J require an external power supply?

Yes, the Cisco 921J uses an included external AC power adapter configured for Japanese voltage and plug standards.

Is the Cisco 921J available outside Japan?

No, the Cisco 921J (SKU C921J-4P) is specifically configured and certified for use exclusively in Japan to meet local regulatory requirements.

What security features are built into the Cisco 921J?

It includes a stateful packet inspection firewall, Intrusion Prevention System (IPS), URL filtering, malware defense, and anti-DDoS protection powered by Cisco IOS Security.

What VPN capabilities does the Cisco 921J support?

The Cisco 921J supports up to 50 IPsec VPN tunnels, SSL VPN client access, and Dynamic Multipoint VPN (DMVPN) for secure site-to-site and remote connectivity.

Which management interfaces does the Cisco 921J offer?

Management options include Cisco IOS CLI, web-based GUI, SNMP v3, and Cisco Security Manager for centralized policy and configuration control.

What is the maximum throughput of the Cisco 921J?

The Cisco 921J delivers up to 150 Mbps of firewall throughput and up to 85 Mbps of IPsec VPN throughput, optimized for branch office environments.

Does the Cisco 921J support IPv6?

Yes, the Cisco 921J fully supports IPv6 routing, addressing, and dual-stack operation alongside IPv4 for modern network deployments.

What are the physical dimensions and weight of the Cisco 921J?

The Cisco 921J measures 194 mm × 138 mm × 41 mm, weighs approximately 0.8 kg, and can be desktop- or rack-mounted using optional brackets.

Which compliance certifications does the Cisco 921J hold for Japan?

The Cisco 921J is certified under TELEC, VCCI, and PSE, ensuring compliance with Japanese radio, EMC, and electrical safety standards.

What is the operating temperature range of the Cisco 921J?

The device operates reliably between 0 °C to 40 °C (32 °F to 104 °F) with 10% to 90% non-condensing relative humidity.

What warranty and support options are available for the Cisco 921J?

Cisco provides a one-year limited hardware warranty, 90-day software updates, and optional SMARTnet service contracts for 24/7 technical support and hardware replacement.

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Name: Cisco 921J Gigabit Ethernet security router with external power supply for Japan only
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C921J-4P

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C921J-4P Overview

C921J-4P is a high-performance enterprise router featuring a fixed modular chassis engineered for robust connectivity and scalable network management. It incorporates multiple high-speed WAN and LAN interfaces with integrated services such as voice, video, and WAN optimization, along with advanced VPN support including IPSec and SSL VPN protocols for secure remote access.

C921J-4P delivers redundant power options via an AC power supply, modular expansion slots for tailored configurations, and a throughput capacity optimized for Gigabit performance. Its streamlined architecture, integrated security features, and proven high availability make it ideally suited for enterprise, business, and industrial use cases that demand reliable network efficiency and performance.

C921J-4P price is is available on request. Get immediate quote.

Request bulk order quote for C921J-4P for additional pricing. Browse the full Cisco Router Isr 900 series or explore all Cisco products.

C921J-4P Specifications

Product Type: Enterprise Router
VPN Support: IPSec / SSL VPN
Power Source: AC Power Supply / Redundant
Routing Protocols: OSPF / BGP / EIGRP / RIP / Static Routing
Broadband: N/A
Architecture: Fixed
WAN Configuration: WAN
WAN Ports: 1 WAN
LAN Ports: 4 LAN Ports
Ethernet Technology: 10/100/1000
Wi-Fi Standard: N/A
Connectivity Type: Wired
Network Protocols: IPv4, IPv6
Remote Management: SNMP, SSH, Telnet, HTTPS
Compliance Standards: FCC, CE, RoHS
Wireless Support: No
Speed/Capacity: Gigabit
Firewall Features: Yes
Features: VPN, IPv6 Compatible, Firewall
Use Case: Enterprise
Management: Managed
Form Factor: Rack-mount
Integrated Services: Voice, Video, WAN Optimization
High Availability Support: Supported
Safety: N/A
EMC: N/A
Telecom: N/A
Throughput Capacity: 1 Gbps
QoS Features: Supported
Built-in Security Features: Firewall, Intrusion Prevention
Expansion Slots: NIM
Modular Slots Available: 1 Slot
Stacking Capability: No
5G Support: No
Memory: 2 GB
Flash Memory: 256 MB
Interface Ports: RJ-45, SFP
Power: 90 Watt
Device Type: Router
Product Name: C921J-4P Enterprise Router
Height: 2 inches
Width: 18 inches
Depth: 16 inches
Weight: 15 lbs

Quality Certifications

To get the detailed certification, please go to the Compliance Center.

Product Comparison Table

	C921J-4P	C927-4P	C927-4PM	C926-4PLTEGB	C931J-4P
5G Support	No	No	No	No	No
Architecture	Fixed	Modular	Modular	Modular	Modular
Broadband	N/A	N/A	Fiber Optic / DSL	LTE	N/A
Built-in Security Features	Firewall, Intrusion Prevention	Firewall / Intrusion Prevention	Firewall / Intrusion Prevention	Firewall, Intrusion Prevention, Malware Protection	Firewall, Intrusion Prevention, Malware Protection
Compliance Standards	FCC, CE, RoHS	FCC / CE	FCC / CE / RoHS	FCC, CE, RoHS	FCC, CE
Connectivity Type	Wired	Wired	Wired	Wired	Wired
Depth	16 inches	12.5 inches	15 inches	N/A	17 inches
Device Type	Router	Router	Router	Router	Router
EMC	N/A	N/A	CE Compliant	N/A	N/A
Ethernet Technology	10/100/1000	10/100/1000	10/100/1000	10/100/1000	10/100/1000
Expansion Slots	NIM	SFP+	NIM / SFP+	N/A	NIM, SFP+
Features	VPN, IPv6 Compatible, Firewall	VPN / Firewall / IPv6 Compatible	VPN / Firewall / QoS / High Availability / Redundancy	VPN, Firewall, NAT, QoS	VPN, Firewall, IPv6 Compatible, High Availability
Firewall Features	Yes	Yes	Yes	Yes	Yes
Flash Memory	256 MB	512 MB	256 MB	256 MB	512 MB
Form Factor	Rack-mount	Rack-mount	Rack-mount / Chassis	Desktop	Rack-mount
Height	2 inches	1.7 inches	1.75 inches	N/A	1.75 inches
High Availability Support	Supported	Supported	Supported	Supported	Supported
Integrated Services	Voice, Video, WAN Optimization	Voice / WAN Optimization	Voice / Video / WAN Optimization	Voice, WAN Optimization	Voice, Video, WAN Optimization
Interface Ports	RJ-45, SFP	RJ-45 / SFP	RJ-45 / SFP	RJ-45, SFP	RJ-45, SFP, Combo Ports
LAN Ports	4 LAN Ports	4 LAN Ports	4 LAN Ports	4 LAN Ports	4 LAN Ports
Management	Managed	Managed	Managed	Managed	Managed
Memory	2 GB	2 GB	4 GB	1 GB	4 GB
Modular Slots Available	1 Slot	1 Slot	2 Slots	1 Slot	3+ Slots
Network Protocols	IPv4, IPv6	IPv4, IPv6	IPv4 / IPv6	IPv4, IPv6, DHCP, NAT	IPv4, IPv6, MPLS
Power	90 Watt	65 Watt	150W	48W	150 W
Power Source	AC Power Supply / Redundant	AC Power Supply / Redundant	AC Power Supply / Redundant	AC Power Supply / DC Power Supply / Redundant	AC Power Supply / Redundant
Product Name	C921J-4P Enterprise Router	C927-4P Enterprise Router	Cisco C927-4PM	C926-4PLTEGB	C931J-4P Enterprise Modular Router
Product Type	Enterprise Router	Enterprise Router	Enterprise Router	Enterprise Gateway	Enterprise Router
QoS Features	Supported	Supported	Supported	Supported	Supported
Remote Management	SNMP, SSH, Telnet, HTTPS	SNMP / Telnet / SSH / HTTP / HTTPS	SNMP / CLI / Web GUI	SSH, Telnet, SNMP, HTTPS	SSH, SNMP, Telnet
Routing Protocols	OSPF / BGP / EIGRP / RIP / Static Routing	OSPF / BGP / EIGRP / RIP / Static Routing	OSPF / BGP / EIGRP / Static Routing	OSPF / BGP / Static Routing	OSPF / BGP / EIGRP / Static Routing
Safety	N/A	N/A	UL Listed	N/A	N/A
Speed/Capacity	Gigabit	Gigabit	Gigabit	Gigabit	Gigabit
Stacking Capability	No	Yes	Yes	No	Yes
Telecom	N/A	N/A	N/A	N/A	N/A
Throughput Capacity	1 Gbps	1 Gbps	2.5 Gbps	1 Gbps	2.5 Gbps
Use Case	Enterprise	Enterprise	Enterprise / Small Business / Industrial	Enterprise, Industrial	Enterprise
VPN Support	IPSec / SSL VPN	IPSec / SSL VPN / DMVPN	IPSec / SSL VPN	IPSec / SSL VPN	IPSec / SSL VPN / GRE / DMVPN / FlexVPN
WAN Configuration	WAN	Dual WAN	Dual WAN	Dual WAN	Dual WAN
WAN Ports	1 WAN	2 WAN	2 WAN	4 WAN	2 WAN
Weight	15 lbs	10 lbs	12 lbs	N/A	11 lbs
Wi-Fi Standard	N/A	N/A	N/A	N/A	N/A
Width	18 inches	17.5 inches	17 inches	N/A	19 inches
Wireless Support	No	No	No	No	No

Reviews & Ratings

Hiroshi Tanaka

Perfectly suited for our Japan-based branches. The external power supply is convenient and the Gigabit performance is rock-solid. A very reliable Cisco ISR model.

Yuki Sato

Excellent performance and reliability. This Japan-specific model handles our local fiber connections perfectly. Very stable and the security features are comprehensive. High satisfaction.

Kenji Yamamoto

Robust and dependable. The 921J provides the consistent connectivity our regional offices in Japan require. Easy to deploy and manage with professional results.

Akira Suzuki

High build quality. This router has been a stable performer in our Japanese network fleet. It delivers fast Gigabit speeds and excellent security with zero issues.

Naomi Ito

Professional grade networking for the Japanese market. It's compact, efficient, and very reliable. The external power supply works perfectly for our office setups.

Questions & Answers

What is the Cisco 921J Gigabit Ethernet security router?

The Cisco 921J is a compact security router featuring four Gigabit Ethernet ports, external power supply, integrated firewall, VPN, and advanced routing, designed for small branch offices in Japan.

Who is the Cisco 921J best suited for?

The Cisco 921J is ideal for small to medium-sized branch offices in Japan requiring secure, high-performance connectivity with integrated VPN and firewall services.

What are the key features of the Cisco 921J?

Key features include four 10/100/1000 Mbps ports, an external AC power adapter, hardware-accelerated firewall, IPsec and SSL VPN, QoS, and full Cisco IOS security software.

How many Gigabit Ethernet ports does the Cisco 921J provide?

The Cisco 921J provides four 10/100/1000 Mbps Gigabit Ethernet LAN ports for high-speed network access and segmentation.

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C921J-4P Overview

C921J-4P price is is available on request. Get immediate quote.

Request bulk order quote for C921J-4P for additional pricing. Browse the full Cisco Router Isr 900 series or explore all Cisco products.

C921J-4P Specifications

Product Type

Enterprise Router

VPN Support

IPSec / SSL VPN

Power Source

AC Power Supply / Redundant

Routing Protocols

OSPF / BGP / EIGRP / RIP / Static Routing

Broadband

N/A

Architecture

Fixed

WAN Configuration

WAN

WAN Ports

1 WAN

LAN Ports

4 LAN Ports

Ethernet Technology

10/100/1000

Wi-Fi Standard

N/A

Connectivity Type

Wired

Network Protocols

IPv4, IPv6

Remote Management

SNMP, SSH, Telnet, HTTPS

Compliance Standards

FCC, CE, RoHS

Wireless Support

Speed/Capacity

Gigabit

Firewall Features

Yes

Features

VPN, IPv6 Compatible, Firewall

Use Case

Enterprise

Management

Managed

Form Factor

Rack-mount

Integrated Services

Voice, Video, WAN Optimization

High Availability Support

Supported

Safety

N/A

EMC

N/A

Telecom

N/A

Throughput Capacity

1 Gbps

QoS Features

Supported

Built-in Security Features

Firewall, Intrusion Prevention

Expansion Slots

NIM

Modular Slots Available

1 Slot

Stacking Capability

5G Support

Memory

2 GB

Flash Memory

256 MB

Interface Ports

RJ-45, SFP

Power

90 Watt

Device Type

Router

Product Name

C921J-4P Enterprise Router

Height

2 inches

Width

18 inches

Depth

16 inches

Weight

15 lbs