Cisco 2801 Integrated Services Router, DSU/CSU, EN, Fast EN



Cisco 2801 Integrated Services Router – Router – DSU/CSU – EN, Fast EN – Cisco IOS – 1 U external

Product Overview

The Cisco 2800 Series comprises four platforms (refer to Figure 1): the Cisco 2801, the Cisco 2811, the Cisco 2821, and the Cisco 2851. The Cisco 2800 Series provides significant additional value compared to prior generations of Cisco routers at similar price points by offering up to a fivefold performance improvement, up to a tenfold increase in security and voice performance, embedded service options, and dramatically increased slot performance and density while maintaining support for most of the more than 90 existing modules that are available today for the Cisco 1700, Cisco 2600, and Cisco 3700 Series.
The Cisco 2800 Series features the ability to deliver multiple high-quality simultaneous services at wire speed up to multiple T1/E1/xDSL connections. The routers offer embedded encryption acceleration and on the motherboard voice digital-signal-processor (DSP) slots; intrusion prevention system (IPS) and firewall functions; optional integrated call processing and voice mail support; high-density interfaces for a wide range of wired and wireless connectivity requirements; and sufficient performance and slot density for future network expansion requirements and advanced applications.
Product Specifications

Table 7. Chassis Specifications


Cisco 2800 Series

Cisco 2801

Cisco 2811

Cisco 2821

Cisco 2851

Product Architecture


• Default: 128 MB
• Maximum: 384 MB
• Default: 256 MB
• Maximum: 768 MB
• Default: 256 MB
• Maximum: 1 GB

Compact Flash

• Default: 64 MB
• Maximum: 128MB
• Default: 64 MB
• Maximum: 256 MB

Fixed USB 1.1 Ports



Onboard LAN Ports



Onboard AIM (Internal) Slot


Interface Card Slots

• 4 slots; 2 slots support HWIC, WIC, VIC, or VWIC type modules
• 1 slot supports WIC, VIC, or VWIC type modules
• 1 slot supports VIC or VWIC type modules

4 slots, each slot can support HWIC, WIC, VIC, or VWIC type modules

Network-Module Slot


1 slot, supports NM and NME type modules

1 slot, supports NM, NME and NME-X type modules

1 slot, supports NM, NME, NME-X, NMD and NME-XD type modules

Extension Voice Module Slot



PVDM (DSP) Slots on Motherboard



Integrated Hardware-Based Encryption


VPN Hardware Acceleration (on Motherboard)

DES, 3DES, AES 128, AES 192, and AES 256

Optional Integrated In-Line Power (PoE)

Yes, requires AC-IP power supply

Console Port
(up to 115.2 kbps)


Auxiliary Port
(up to 115.2 kbps)


Minimum Cisco IOS Software Release


Rack Mounting

Yes, 19-inch

Yes, 19- and 23-in. options

Wall Mounting





Power Requirements

AC Input Voltage

100 to 240 VAC, autoranging

AC Input Frequency

47-63 Hz

AC Input Current

2A (110V) 1A (230V)

3A (110V) 2A (230V)

AC Input Surge Current

50A maximum, one cycle (-48V power included)

AC-IP Maximum In-Line Power Distribution





AC-IP Input Current

4A (110V) 2A (230V)

8A (110V) 4A (230V)

AC-IP Input Surge Current

50A maximum, one cycle (-48V power included)

DC Input Voltage

No DC Power Option available

24 to 60 VDC, autoranging positive or negative

DC Input Current

• No DC Power Option available
• 8A (24V)
• 3A (60V)
• Startup current 50A<10 ms
• 12A (24V)
• 5A (60V)
• Startup current 50A<10 ms

Typical Power Dissipation

(No Modules)

42W (143 BTU/hr)

32W (109 BTU/hr)

54W (184 BTU/hr)

58W (197 BTU/hr)

Power Dissipation-AC without IP Phone Support

150W (511 BTU/hr)

170W (580 BTU/hr)

280W (955 BTU/hr)

280W (955 BTU/hr)

Power Dissipation-AC with IP Phone Support-System Only

150W (511 BTU/hr)

210W (717 BTU/hr)

310W (1058 BTU/hr)

370W (1262 BTU/hr)

Power Dissipation-AC with IP Phone Support-IP Phones

180W (612 BTU/hr)

160W (546 BTU/hr)

240W (819 BTU/hr)

360W (1128 BTU/hr)

Power Dissipation-DC

Not applicable

180W (614 BTU/hr)

300W (1024 BTU/hr)

300W (1024 BTU/hr)



External only, connector for RPS provided by default

Recommended RPS Unit

No RPS option

Cisco RPS-2300 Redundant Power System

Environmental Specifications