The Cisco 1841 Integrated Services Router is part of the Cisco 1800 Integrated Services Router Series which complements the Integrated Services Router Portfolio.

The Cisco 1841 Integrated Services Router provides the following support:
- Wire-speed performance for concurrent services at T1/E1 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 (two)
- Support for over 90 existing and new modules
- Support for majority of existing WICs, VWICs, and VICs (data mode only)
- Two Integrated 10/100 Fast Ethernet ports
Security
- On-board encryption
- Support of up to 800 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

Specification

Product
Product id	138305
Brand	Cisco Systems
Partnr	CISCO1841
EAN/UPC code	746320950228
Network
Data transfer rate	100 Mbit/s
Wireless LAN features
Wi-Fi	N
DSL features
DSL connection type	N
Ports & interfaces
I/O ports	2x 10/100\n
Protocols
Routing protocols	BGP, EIGRP, OSPF, RIPv1, RIPv2
Supported network protocols	IPSec
Security
VPN support	DES, 3DES, AES 128, AES 192, AES 256
Technical details
Supports ISDN connection	N
Features
Flash memory	32 MB
Internal memory	128 MB
Safety	UL60950-1, CAN/CSA 60950-1, AS 3260, EN60950-1
Certification	- EN 55022, 1998, class A\n- CISPR22, 1997, class A\n- CFR47, Part 15, Subpart B, 1995, class A\n- EN61000-3-2\n- EN61000-3-3\n
Design
LED indicators	Y
Power
Power consumption (typical)	50 W
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-25 - 65 °C
Operating relative humidity (H-H)	10 - 85 procent
Storage relative humidity (H-H)	5 - 95 procent
Weight & dimensions
Weight	2800 g
Other features
Power requirements	100 - 240 VAC (50 - 60 Hz)
Maximum data transfer rate	0.1 Gbit/s
Dimensions (WxDxH)	343 x 274 x 47.5 mm
Networking features	Fast Ethernet
Connectivity technology	Wired
Data link protocols	Ethernet, Fast Ethernet
Non-operating relative humidity (non-condensing)	5 - 95 procent
Switching protocols	AppleTalk, ATM, Frame Relay, IP, IPX, RSVP