The Cisco 2921 Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services for small offices. Key features include:
- 3 Integrated 10/100/1000 Ethernet ports with 1 port capable of RJ-45 or SFP connectivity
- 1 service module slot
- 4 Enhanced High-Speed WAN Interface Card (EHWIC) slots
- 3 onboard digital signal processor slots
- 1 internal service module slot for application services
- Fully integrated power distribution to modules supporting 802.3af Power over Ethernet (PoE) and Cisco Enhanced PoE