The Cisco 2921 ISR Router Integrated Services Router (ISR) is a modular router featuring embedded hardware encryption, voice and video capable digital signal processor (DSP) slots, optional firewall, intrusion prevention, call processing,and application services.
The chassis offers a single:
- Internal Services Module (ISM) slot
- 4 eHWIC slots
- 2 10/100/1000 WAN ports
- 2 GE DSP slots
- 256MB of Flash memory
- 512MB of DRAM in a 1U form factor
The Cisco business 2921 ISR Router supports the industry’s widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, copper, and fiber GE.