安全
| 防火墙 |
IOS |
| MAC（媒体存储控制）地址过滤 |
Y |
其他功能
| 连通的液晶显示器 |
Y |
| 接受频率 |
50 Hz |
| 遵守工业标准 |
SHDSL |
| 输入电压 |
100 - 240 V |
| 电源类型 |
AC |
以太网LAN特性
| 全双工传输 |
Y |
| 以太网的数据传输率 |
10, 100, 1000 Mbit/s |
性能
| 内置存储器 |
512 MB |
| 闪存 |
256 MB |
| 芯片组 |
Infineon |
认证标准
| 安全 |
UL 60950, IEC 60950-1, EN 60950-1 |
环境条件
| 运行温度范围（T - T） |
-40 - 158 °F |
另外
| 以太网连接器 |
Y |
| 连接方式 |
Wired |
| 以太网路(RJ-45)连接接口数量 |
2 |
Bundle with IOS Advanced IP Services, 256 MB Flash, 512 MB DRAM
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
