Cisco 2821. Ethernet interface type: Gigabit Ethernet, Cabling technology: 10/100/1000Base-T(X), Ethernet LAN data rates: 10,100,1000 Mbit/s. Security algorithms: 128-bit AES,192-bit AES,256-bit AES,3DES,DES, Firewall security: Cisco IOS. Flash memory: 128 MB, Internal memory: 256 MB, Safety: UL 60950, CAN/CSA C22.2 No. 60950, IEC 60950, EN 60950-1, AS/NZS 60950. Product colour: Black,Blue,Stainless steel, Rack capacity: 2U. Weight: 11.4 kg, Width: 438.2 mm, Depth: 416.6 mm

Integrated Services for Small and Medium Business

The Cisco 2821 Integrated Services Router is part of the Cisco 2800 Integrated Services Router Series which complements the Integrated Services Router Portfolio.

The Cisco 2821 Integrated Services Router provides the following support:

- Wire-speed performance for concurrent services such as security and voice , and advanced services to multiple T1/E1/xDSL WAN rates
- Enhanced investment protection through increased performance and modularity
- Enhanced investment protection through increased modularity
- Increased density through High-Speed WAN Interface Card Slots (four)
- Enhanced Network Module Slot
- Support for over 90 existing and new modules
- Support for majority of existing AIMs, NMs, WICs, VWICs, and VICs
- Two Integrated 10/100/1000 Ethernet ports
- Optional Layer 2 switching support with Power over Ethernet (PoE) (as an option)

Security
- On-board encryption
- Support of up to 1500 VPN tunnels with the AIM-EPII-PLUS Module
- Antivirus defense support through Network Admission Control (NAC)
- Intrusion Prevention as well as stateful Cisco IOS Firewall support and many more essential security features

Voice
Analog and digital voice call support
Dedicated Extension Voice Module slot
Optional voice mail support
Optional support for Cisco CallManager Express (Cisco CME) for local call processing in stand alone business for up to48 IP Phones
Optional support for Survivable Remote Site Telephony support for local call processing in small enterprise branch offices for up to 48 IP phones