Description:

The Cisco 2821 Integrated Services Router is used in enterprise network infrastructures to provide secure WAN connectivity, voice services, and integrated routing for branch office networks. Commonly installed in corporate branch offices, telecommunications rooms, and small enterprise network environments requiring reliable routing and unified communications support. Maintenance teams and system integrators use this part for network expansion, infrastructure upgrades, system retrofits, or replacement of existing Cisco ISR routing equipment. 

Applications:

The Cisco 2821 router is used in enterprise and commercial networking environments where secure WAN routing, voice communication, and integrated network services are required. It is commonly deployed in branch offices, retail networks, educational institutions, and small data centers to connect local networks to service provider links while supporting VPN connectivity, IP telephony, and secure data transmission across distributed network infrastructures.

Technical Specifications:

• Manufacturer: Cisco
• Model: 2821
• Product Type: Integrated Services Router (ISR)
• Series: Cisco 2800 Series
• Cisco IOS Version: 15.1
• Cisco CallManager Express (CME): Version 8.5 support
• DRAM Memory: 1 GB
• Flash Memory: 256 MB
• Integrated Interfaces: 2 x 10/100 Fast Ethernet ports
• Expansion Slots: 4 x HWIC slots, 1 x AIM slot, 1 x Network Module slot
• USB Ports: 1 x USB 1.1 port
• Security Features: VPN, firewall, and encryption support
• Form Factor: Rack-mountable chassis
• Power Supply: Internal AC power supply

Common Replacements:

• Cisco 2911 Integrated Services Router
• Cisco 2901 Integrated Services Router
• Cisco 2811 Integrated Services Router