C921J-4P, Cisco 921J Security Router, 1GE WAN/4GE LAN/External Power Supply

  • Brand: Cisco
  • Model: C921J-4P
Rating:
96%
4.8/5.0
  • 100% Genuine
    100% Genuine
    Original, factory-verified
    3-Year Warranty
    3-Year Warranty
    Extended, enterprise-grade
    Years Expertise
    24 Years Expertise
    Proven, deployment-focused
  • Condition
    • Original New
    expert
    Certified Expertise Builds Trust
    CCIE · JNCIE · NSE7 · ACDX · HPE Master ASE · Dell Server/AI Expert
    • Faster Delivery, Globally Ready

      Faster Delivery, Globally Ready

      20+ years of supply chain expertise for faster multi-stop delivery with smooth customs.

      48H Worldwide Shipping
      10+ Global Warehouses
    • Keep Projects On Time

      Keep Projects On Time

      Reliable availability and real-time shipment visibility to keep every critical IT project on schedule.

    • Leading Global Distributor Since 2002

      Leading Global Distributor
      Since 2002

      A global ICT bridge delivering authentic hardware and trusted service for over 20 years.

        21500+ Enterprise Clients Served200+ Countries & Regions Covered
    • Worry-Free Coverage with RSCare

      Worry-Free Coverage with RSCare

      3-Year warranty for enterprise hardware, including advanced RMA, diagnostics, spare parts support, and OEM service compatibility.

      Cisco SmartNet
      HPE Foundation Care
      Dell ProSupport
      Juniper Care
      Fortinet Support
    • Your Trusted Genuine Source

      Your Trusted Genuine Source

      Authorized partnerships with 30+ brands, including Cisco, HPE, Dell, Juniper, and Fortinet.

      100% Authentic Products
      100,000+ Multi-Brand SKUs Available
    Overview

    Cisco C921J-4P Overview

    C921J-4P is the Cisco 921J Gigabit Ethernet security router with external power supply for Japan only. Cisco® 900J Series Integrated Services Routers (ISRs) combine Internet access, comprehensive security, and wireless services in a single high-performance device that is easy to deploy and manage. They are well suited for deployment as Customer Premises Equipment (CPE) in enterprise small branch offices and in service provider managed-service environments. The C921J-4P supported only on Cisco IOS Software Release 15.8(3)Mb and later.

    Quick Spec

    Table 1 shows the quick spec.

    Model

    C921J-4P

    Description

    Cisco 921J Gigabit Ethernet security router with external power supply for Japan only

    WAN interfaces

    2 ports Gigabit Ethernet (GE)

    LAN interfaces

    4-port 10/100/1000-Mbps managed switch

    Integrated USB 2.0

    Yes

    Default and maximum DRAM

    Default 1 GB

    Default and maximum flash memory

    2 GB; not upgradable

    Dimension

    1.10 x 8.50 x 6.50 in. (2.80 x 21.59 x 16.51 cm) (includes rubber feet)

    Product Detail

    Figure 1 shows the ports of C921J-4P.

    C921J-4P front view

    Note:

    #6-32 Ground screw

    GE LAN port

    Power button

    GE LAN port

    12VDC input

    GE LAN port

    Reset button

    GE WAN port

    System LED

    Console port

    USB2.0 port

    Kensington Lock

    GE LAN port

    VPN LED

    GE LAN port

     

    Compare to Similar Item

    Table 2 shows the comparison.

    Model

    C921-4P

    C921J-4P

    Description

    Cisco 921 Gigabit Ethernet security router with internal power supply

    Cisco 921J Gigabit Ethernet security router with external power supply for Japan only

    WAN interfaces

    1 port GE and 1 VADSL (Annex B/J)

    2 ports Gigabit Ethernet (GE)

    LAN interfaces

    4-port GE managed switch

    4-port 10/100/1000-Mbps managed switch

    Integrated USB 2.0

    Yes

    Yes

    Default and maximum DRAM

    Default 1 GB

    Default 1 GB

    Default and maximum flash memory

    2 GB; not upgradable

    2 GB; not upgradable

    Get More Information

    Do you have any question about the C921J-4P

    Contact us now via Live Chat or [email protected].

    Quality Certifications

    • ISO 14001
    • ISO 9001
    • RoHS
    • REACH
    • CE
    • FCC
    Specification

    Cisco C921J-4P Specification

    C921J-4P Specification

    Description

    Cisco 921J Gigabit Ethernet security router with external power supply for Japan only

    WAN interfaces

    2 ports Gigabit Ethernet (GE)

    LAN interfaces

    4-port 10/100/1000-Mbps managed switch

    Integrated USB 2.0

    Yes

    Cisco IOS Software

    IP and IP services

    ●  Routing Information Protocol Versions 1 and 2 (RIPv1 and RIPv2)

    ●  Generic Routing Encapsulation (GRE) and multipoint GRE (MGRE)

    ●  Cisco Express Forwarding

    ●  Standard 802.1d Spanning Tree Protocol

    ●  Layer 2 Tunneling Protocol (L2TP)

    ●  L2TP Version 3 (L2TPv3)

    ●  Network Address Translation (NAT)

    ●  Dynamic Host Configuration Protocol (DHCP) server, relay, and client

    ●  Dynamic DNS

    ●  DNS Proxy

    ●  DNS Spoofing

    ●  Access Control Lists (ACLs)

    ●  IPv4 and IPv6 multicast

    ●  Open Shortest Path First (OSPF)

    ●  Border Gateway Protocol (BGP)

    ●  Performance Routing (PfR)

    ●  Enhanced Interior Gateway Routing Protocol (EIGRP)

    ●  Virtual Route Forwarding (VRF) Lite

    ●  Next Hop Resolution Protocol (NHRP)

    ●  Bidirectional Forwarding Detection (BFD)

    ●  Web Cache Communication Protocol (WCCP)

     

    Switch features

    ●  Auto Media Device In/Media Device Cross Over (MDI-MDX)

    ●  25 802.1Q VLANs

    ●  MAC filtering

    ●  Four-port 802.3af and Cisco compliant PoE

    ●  Switched Port Analyzer (SPAN)

    ●  Storm control

    ●  Smart ports

    ●  Secure MAC address

    ●  Internet Group Management Protocol Version 3 (IGMPv3) snooping

    ●  802.1X

    Security features

    Secure connectivity:

    ●  Secure Sockets Layer (SSL) VPN for secure remote access

    ●  Hardware-accelerated DES, 3DES, AES 128, AES 192, and AES 256

    ●  Public-Key-Infrastructure (PKI) support

    ●  50 IPsec tunnels

    ●  Cisco Easy VPN client and server

    ●  NAT transparency

    ●  Dynamic Multipoint VPN (DMVPN)

    ●  Tunnel-less Group Encrypted Transport VPN (GET VPN)

    ●  VRF-aware IPsec

    ●  IPsec over IPv6

    ●  Adaptive control technology

    ●  Session Initiation Protocol (SIP) application-layer gateway

    ●  Cisco IOS Firewall:

    ◦   Zone-based policy firewall

    ◦   VRF-aware stateful inspection routing firewall

    ◦   Stateful inspection transparent firewall

    ●  Advanced application inspection and control

    ●  Secure HTTP (HTTPS), FTP, and Telnet Authentication Proxy

    ●  Dynamic and static port security

    ●  Firewall stateful failover

    ●  VRF-aware firewall

    ●  Cisco IOS Software black and white lists

    ●  Integrated threat control:

    ◦   Intrusion Prevention System (IPS)

    ●  Control plane policing

    ●  Flexible packet matching

    ●  Network foundation protection

    Quality of Service (QoS)

    ●  Low-Latency Queuing (LLQ)

    ●  Weighted Fair Queuing (WFQ)

    ●  Class-Based WFQ (CBWFQ)

    ●  Class-Based Traffic Shaping (CBTS)

    ●  Class-Based Traffic Policing (CBTP)

    ●  Policy-Based Routing (PBR)

    ●  Class-Based QoS MIB

    ●  Class of service (CoS)-to-differentiated services code point (DSCP) mapping

    ●  Class-Based Weighted Random Early Detection (CBWRED)

    ●  Network-Based Application Recognition (NBAR)

    ●  Link fragmentation and interleaving (LFI)

    ●  Resource Reservation Protocol (RSVP)

    ●  Real-Time Transport Protocol (RTP) header compression (cRTP)

    ●  Differentiated Services (DiffServ)

    ●  QoS preclassify and prefragmentation

    ●  Hierarchical QoS (HQoS)

    Management

    ●  Cisco Configuration Professional

    ●  Cisco Configuration Express

    ●  Cisco Configuration Engine support

    ●  Cisco AutoInstall

    ●  Cisco IP Service-Level Agreement (IP SLA)

    ●  Cisco IOS Embedded Event Manager (EEM)

    ●  CiscoWorks

    ●  Cisco Security Manager

    ●  Telnet, Simple Network Management Protocol Version 3 (SNMPv3), Secure Shell (SSH) Protocol, command-line interface (CLI), and HTTP management

    ●  RADIUS and TACACS+

    ●  Cisco Next Generation Plug-and-Play (NG PnP) Protocol

    High availability

    ●  Virtual Router Redundancy Protocol (VRRP) (RFC 2338)

    ●  HSRP

    ●  MHSRP

    Metro Ethernet

    ●  Ethernet OA&M

    ●  Ethernet Local Management Interface (E-LMI)

    ●  IP SLA for Ethernet

    IPv6

    ●  IPv6 addressing architecture

    ●  IPv6 name resolution

    ●  IPv6 statistics

    ●  IPv6 translation: Transport packets between IPv6-only and IPv4-only endpoints (NAT-Protocol Translation)

    ●  Internet Control Message Protocol Version 6 (ICMPv6)

    ●  IPv6 DHCP

    ●  OSPFv3

    ●  BGP4+

    ●  IPv6 path maximum transmission unit (PMTU)

    ●  IPv6 neighbor discovery

    ●  IPv6 stateless address autoconfiguration (SLAAC)

    ●  IPv6 multicast routing

    Application visibility and control

    ●  NBAR2

    ●  Flexible NetFlow (FNF)

    ●  Performance Agent

    Number of recommended users

    ●  50

    Default and maximum DRAM

    ●  Default 1 GB

    Default and maximum flash memory

    ●  2 GB on all Cisco 900J Series ISR models; not upgradable

    WAN

    ●  Refer to Table 2 for details

    LAN switch

    ●  Refer to Table 2 for details

    Separate console ports

    ●  RJ-45

    USB 2.0

    ●  One USB 2.0 Type A port available

    Physical dimensions and weight

    Weight: 2.04 lb (0.924 kg) maximum

    Product dimensions:

    ●  H x W x D = 1.10 x 8.50 x 6.50 in. (2.80 x 21.59 x 16.51 cm) (includes rubber feet)

    External power supply

    Power specifications:

    ●  External power supply

    ●  AC input voltage: Universal 100 to 240 VAC

    ●  Frequency: 50 to 60 Hz

    ●  Maximum output power: 18W

    ●  Output voltages: 12 VDC

    Approvals and compliance

    Safety:

    ●  IEC 60950-1, 2nd Edition with Amendment 1 and Amendment 2 with Japan national deviations

    Emissions:

    ●  47 CFR Part 15: 2006

    ◦   CISPR22: 2005

    ◦   EN300386: V1.3.3: 2005

    ◦   EN55022: 2006

    ◦   EN61000-3-2: 2000 [+ amd 1 & 2]

    ◦   EN61000-3-3: 1995 [+ amd 1: 2001]

    ◦   ICES-003 Issue 4: 2004

    ◦   KN 22: 2005

    ●  VCCI: V-3/2006.04

    Immunity:

    ●  CISPR24: 1997 [+ amd 1 & 2]

    ◦   EN300386: V1.3.3: 2005

    ◦   EN50082-1: 1992

    ◦   EN50082-1: 1997

    ◦   EN55024: 1998 [+ amd 1 & 2]

    ◦   EN61000-6-1: 2001

    Environmental operating range

    ●  Nonoperating temperature: -40° to 158°F (-40° to 70°C)

    ●  Nonoperating humidity: 5% to 95% relative humidity (noncondensing)

    ●  Nonoperating altitude: 0 to 15,000 ft (0 to 4570 m)

    ●  Operating temperature: 0° to 45°C (de-rate 1°C per 1000-ft increase in altitude)

    ●  Operating humidity: 5% to 95% relative humidity (noncondensing)

    ●  Operating altitude: 0 to 10,000 ft (0 to 3000 m)

    Quality Certifications

    Need Help? Technical Experts Available Now.

    • +1-626-655-0998 (USA)
      UTC 15:00-00:00
    • +852-2592-5389 (HK)
      UTC 00:00-09:00
    • +852-2592-5411 (HK)
      UTC 06:00-15:00
    Need Help? Technical Experts Available Now.
    Q&A

    Questions & Answers

    What accessories are available for the Cisco 921J-4P router?

    Available accessories include additional Ethernet cables, mounting kits, and external power supplies.

    How does the Cisco 921J-4P compare to other routers in its category?

    The Cisco 921J-4P offers competitive Gigabit Ethernet speeds and advanced security features at a lower cost compared to other small business routers in the Cisco 900 ISR series.

    What makes the Cisco 921J-4P an ideal choice for Japanese businesses?

    The Cisco 921J-4P is designed specifically for the Japanese market with local power supply standards and offers robust security and performance.

    Is router-switch.com a reliable distributor?

    Absolutely. As a multi-brand authorized distributor, router-switch.com is directly certified by leading technology manufacturers. We guarantee 100% genuine products, competitive pricing, and full manufacturer warranties and support.

    Warranty
    • Your Trusted Global ICT Partner

      Delivering reliable, cross-border fulfillment with 20+ years of expertise, backed by rigorous QC, fast logistics, and worldwide warehousing.
      Global warehousing
      Global warehousing
      10+ hubs positioned for fast international dispatch and stable availability.
      Seamless cross-border
      Seamless cross-border
      QC-verified packing and predictable delivery via FedEx, DHL, UPS.
      Your Trusted Global ICT Partner
    • ICT Tools Hub for Confident Monitoring

      ICT Tools Hub for Confident Monitoring

      Stay informed on product lifecycle status and real-time inventory availability—supporting confident planning, sourcing, and operational execution.
      EOL/EOSL Checker
      Verify product lifecycle status to plan purchases and avoid EOL/EOSL risks.
      Request VIP Inventory Portal Access
      Connect via live chat for VIP access to real-time inventory on priority SKUs.
    • Certified Experts Across Leading Vendors

      Professional guidance for network, security & data center builds, delivered by certified experts with extensive, hands-on deployment experience.
      Multi-vendor engineering
      Multi-vendor engineering
      Certified expertise across Cisco, HPE, Aruba, Dell, Juniper, Huawei and Fortinet.
      Deployment-ready guidance
      Deployment-ready guidance
      Faster, safer rollouts with project-focused engineering guidance.
      Certified Experts Across Leading Vendors

    The Choice of 21,500 +Global Customers

    • Ford
    • Disney
    • Nestle
    • Toyota
    • Walmart
    • Philips
    • Ups
    • Huatt
    • Hsbc
    • Novartis
    • Siemens Healthineers
    • Bt
    • Reference Johnson
    • T
    • Att
    • Lgu
    • Sk Telecom
    • Veerizon
    Industry-Leading Warranty Coverage You Can Trust
    • 100% Low Price Guarantee
      100% Low Price Guarantee
      Router-switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
    • 100% Quality Assurance
      100% Quality Assurance
      All items are brand new, original, and factory-sealed.
      Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
    • 100% Money-Back Guarantee
      100% Money-Back Guarantee
      If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly.
      Visit Return Policy page for more information.
    • Free Cisco CCIE Technical Support
      Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
    • Flexible & Secure Payment and Shipping
      Flexible & Secure Payment and Shipping
      We support multiple secure payment and logistics options, backed by industry-leading verification:
      • Pay by wire transfer.
      • Pay with your paypal.
      • Pay with your Visa credit card.
      • Pay with your Mastercard credit card.
      • Pay with your Discover Card.
      • Pay by American Express.
      More
      • mcafee-secure
      • verisign-secured
      • pci-dss
      • ssl-encryption
      Visit How to Pay page for more information
    Warranty Coverage & RMA Instructions
    • Extended, Worry-Free Warranty Coverage
      Extended, Worry-Free Warranty Coverage
      • Factory New Sealed Enterprise Hardware: 3 Years
      • Factory New Sealed Consumer Devices: 1 Year
      Visit Warranty Policy page for more information
    • How to Get Support
      How to Get Support
      If you encounter issues with products, please reach out to your dedicated sales representative. They will assist with diagnostics, remote troubleshooting, and RMA processing if necessary.
      Visit Contact Us page for more support options.

    Best-Fit Solutions for Your Network

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Deploy DeepSeek-V3/R1: Powerful AI, Low Cost

    Expert-configured AI solution: Same power, 90% savings—multi-scenario flexibility with Dell/Huawei/Lenovo options.

    AI
    Beyond Bandwidth: The 100G+ Data Center Architecture

    Beyond Bandwidth: The 100G+ Data Center Architecture

    The must-have 100G foundation - AI-ready growth, zero-latency performance

    Data Center
    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    400G/800G Ethernet Switch: Maxmize Margins via AI-Ready Solutions

    High-Profit data center switches from Cisco, Huawei, Mellanox & Juniper.

    Ethernet Switch
    Download
    Model Datasheet

    Product Tags