Cisco 2821 Integrated Services Router – Black

The Cisco 2821 Integrated Services Router (ISR) is part of Cisco’s original ISR Generation 1 series, engineered to support the integration of multiple services—including voice, data, security, and wireless—into a single, compact routing platform for small to medium-sized business or branch office deployments.

The 2821 offers:

Two integrated 10/100 Ethernet ports

Support for Cisco Call Manager Express (CME) and SRST for IP telephony

Integrated VPN hardware acceleration for secure communications

Advanced security features such as firewall, intrusion prevention, and Cisco IOS security capabilities

Modular slots supporting HWICs, VICs, and AIMs, allowing flexible expansion for WAN interfaces, voice modules, and additional services

Digital Signal Processor (DSP) slots for voice applications such as conferencing and transcoding

While now considered end-of-life (EOL), the Cisco 2821 remains a reliable solution in many legacy environments. It was designed to simplify network architecture by consolidating multiple devices into one integrated system, lowering total cost of ownership while maintaining robust performance and service integration.