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CISCO 851 Bredbåndsruter,  Eth/ Wireless (CISCO851W-G-E-K9)

CISCO 851 Bredbåndsruter, Eth/ Wireless


Cisco 850 Series Integrated Services Routers

Part Number



Cisco 851 Ethernet to Ethernet Router


Cisco 851 Ethernet to Ethernet Wireless Router; Americas


Cisco 851 Ethernet to Ethernet Wireless Router; Europe


Cisco 851 Ethernet to Ethernet Wireless Router; Japan


Cisco 857 ADSL Router


Cisco 857 ADSL Wireless Router; U.S. and Americas


Cisco 857 ADSL Wireless Router; Europe

The Cisco® 850 Series of secure broadband and wireless routers is part of the Cisco Integrated Services Router portfolio. Designed for small offices, the routers provide secure WAN connectivity with optional integrated 802.11b/g WLANs in a single device. Easy setup allows the Cisco 850 Series to be deployed at small remote offices and small businesses, and remote management features enable IT managers and service providers to provide better support at remote sites.


Cisco 850 Series integrated services routers are fixed-configuration routers that support broadband cable and Asymmetric DSL (ADSL) over analog telephone lines connections in small offices (Figures 1 and 2). They provide the performance needed to run concurrent services, including firewall and encryption for VPNs and optional 802.11b/g for wireless networking. The Cisco Router and Security Device Manager (SDM) Web-based configuration tool simplifies setup and deployment (Figure 3), and centralized management capabilities give network managers visibility and control of router configurations at the remote site.

Cisco 850 Series integrated services routers offer:

  • Secure connectivity with Stateful Inspection Firewall and IP Security (IPSec) VPN support for small offices
  • • 4-port 10/100 switch
  • • Secure WLAN 802.11b/g option with a single fixed antenna
  • • Easy setup, deployment, and remote management capabilities through Web-based tools and Cisco IOS® Software




Stateful Inspection Firewall and IPSec VPN Support

Provides secure access when connecting to the Internet or connecting small offices to a central site

4-Port Mbps 10/100 Switch

High-speed LAN ports connect multiple devices to the small office network

Optional 802.11b/g WLANs

Offers a secure broadband router and access point for WLANs in a single device

Cisco SDM and Remote Management Features of Cisco IOS Software
· Cisco SDM helps resellers and customers to quickly and easily deploy, configure, and monitor a Cisco access router without knowledge of the Cisco IOS Software command-line interface (CLI)
· Out-of-band management with an external modem through the auxiliary port allows IT managers to remotely manage routers at small office sites
· Cisco Configuration Express Service supports factory-loaded configurations in high-volume deployments
· Support for the Cisco CNS 2100 Series Intelligence Engine enables plug-and-play installations with centralized configuration management



Routing Protocols and General Router Features
· Routing Information Protocol (RIPv1 and RIPv2)
· Layer 2 Tunneling Protocol (L2TP)
· Network Address Translation (NAT) and Port Address Translation (PAT)
· RFC 1483/2684
· Point-to-Point Protocol over ATM (PPPoA) (Cisco 857)
· PPP over Ethernet (PPPoE)
· 802.1d Spanning Tree Protocol
· Dynamic Host Control Protocol (DHCP) server/relay/client
· Access control lists (ACLs)
· Generic routing encapsulation (GRE)
· Dynamic DNS Support for Cisco IOS
Recommended Number of Users


DSL and ATM Features (DSL Model Only)
· ATM Unspecified Bit Rate (UBR), Constant Bit Rate (CBR), and Variable Bit Rate/non-real-time (VBR-nrt)
· ATM Operation, Administration, and Maintenance (OAM) Support for F5 Continuity Check; segment and end-to-end loopback; and Interim Local Management Interface (ILMI) support
· 8 virtual circuits
Security Features
· Stateful Inspection Firewall
· Hardware-accelerated Triple Data Encryption Standard (3DES) for IPSec
· Hardware-accelerated Advanced Encryption Standard (AES) for IPSec
· IPSec 3DES termination/initiation
· IPSec pass-through
· 5 VPN Tunnels
· Point-to-Point Tunneling Protocol (PPTP) pass-through
· L2TP pass-through
· Advanced Application Inspection and Control
· E-mail Inspection Engine
· No Service Password Recovery
· HTTP Inspection Engine
· System Logging-EAL4 Certification Enhancements
Quality of Service (QoS) Features
· Weighted Fair Queuing (WFQ)
· Policy-based routing (PBR)
· Per-VC queuing
· Per-VC traffic shaping
Management Features
· Cisco SDM
· Cisco Configuration Express
· Cisco CNS 2100 Intelligence Engine support
· DSL firmware update from Flash
· Cisco Service Assurance Agent (SAA)
· Telnet, Simple Network Management Protocol (SNMP), CLI, and HTTP management
· Out-of-band management with external modem through virtual auxiliary port



WLAN Hardware
· 802.11b/g
· Automatic rate selection for 802.11b/g
· External antenna (cannot be removed)
· Indoor range: 1 Mbps @ 320 ft
· WECA interoperability
· Default antenna gain: 2.2 dBi
WLAN Software Features
· Maximize throughput or maximize range option
· Software configurable transmit power
WLAN Security Features
· 802.1X
· 802.11i (software-upgradeable in future software release)
· Wi-Fi Protected Access (WPA)
· Cisco LEAP
· Static and dynamic Wired Equivalent Privacy (WEP)
· Temporal Key Integrity Protocol (TKIP)/SSN Temporal Key Integrity Protocol/Simple Security Network encryption
· MAC authentication/filter
· User database for survivable local authentication using LEAP
· Configurable limit to the number of wireless clients
· Configurable RADIUS accounting for wireless clients
· PSK (Pre Shared Keys) (WPA-SOHO)


Wireless VLANs




Default DRAM

64 MB

Maximum DRAM

64 MB

Default Flash Memory

20 MB

Maximum Flash Memory

20 MB

· Cisco 851: 100 MB Ethernet
· Cisco 857: ADSL over analog telephone lines
LAN Switch

4-port 10/100BASE-T switch with autosensing MDI/MDX (Media Device In/Media Device Crossover) for auto-crossover

802.11b/g WLANs

Optional on both models

Console Port




External Power Supply

Universal 100 to 240 VAC

DSL Specifications
· ST-Micro DynaMiTe (formerly Alcatel Micro Electronics) ADSL Chipset (20190)
· T1.413 ANSI ADSL DMT issue 2
· G.992.1 ITU G.DMT support
· G.992.3 ITU G.hs ADSL type negotiation
· G.992.3 (ADSL 2)/G.992.5(ADSL2+)

DSL Forum TR-067 The chipset does not provide interoperability with carrierless amplitude modulation/phase modulation (CAP)-based ADSL lines.

Wireless Specifications

Data Rates Supported

1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, and 54 Mbps

Receive Sensitivity


-94dBm @ 1 Mbps

-93dBm @ 2 Mbps

-92dBm @ 5.5 Mbps

-90dBm @ 11 Mbps


-92dBm @ 6 Mbps

-90dBm @ 9 Mbps

-89dBm @ 12 Mbps

-87dBm @ 18 Mbps

-85dBm @ 24 Mbps

-81dBm @ 36 Mbps

-76dBm @ 48 Mbps

-73dBm @ 54 Mbps

Maximum Conducted Transmit Power

Note: Maximum power setting subject to changes by channel & by region depending on regulations

802.11b Average: 80mW (19dBm), Peak (FCC): 245mW (23.9dBm)

802.11g Average: 50mW (17dBm)

· IEC 61000-4-2:1995 Immunity to Electrostatic Discharges
· IEC 61000-4-3:1995 Immunity to Radio Frequency Electromagnetic Fields
· IEC 61000-4-4:1995 Immunity to Electrical Fast Transients
· IEC 61000-4-5:1995 Immunity to Power Line Transients (Surges)
· IEC 61000-4-6:1996 Immunity to Radio Frequency-Induced Conducted Disturbances
· IEC 6100-4-8: 1003 Immunity to Power-Frequency Magnetic Fields (N/A for most Cisco equipment)
· IEC 61000-4-11:1995 Immunity to Voltage Dips, Voltage Variations, and Short Voltage Interruptions
Physical Dimensions and Weight
· Dimensions with antenna connectors (H x W x D): 2.00 x 10.25 x 9.13 in.
(50.8 mm x 260.4 mm x 231.9 mm)
· Dimensions without antenna connectors (H x W x D): 2.00 x 10.25 x 8.50 in.
(50.8 mm x 260.4 mm x 215.9.9 mm)
· Weight: 2.10 lb (0.954 kg) (Antenna not included)
· AC input voltage: 100 to 240 VAC
· Frequency: 50 to 60 Hz
· Maximum output power: 26W
· Output voltages: 5 and 12V
Approvals and Compliance
· UL 1950/CSA 950-95, Third Edition
· IEC 950: Second Edition with Amendments 1, 2, 3, and 4
· EN60950: 1992 with Amendments 1, 2, 3, and 4
· CS-03, Canadian Telecom Requirements
· FCC Part 68 U.S. Telecom Requirements
· AS/NZS 3260: 1996 with Amendments 1, 2, 3, and 4
· ETSI 300-047
· TS 001 with Amendment 1
· AS/NRZ 3548: 1992 Class B
· CFR 47 Part 15 Class B
· EN60555-2 Class B
· EN55022 Class B
· VCCI Class II
· ICES-003, Issue 2, Class B, April 1997S
· IEC 1000-3-2

Environmental Operating Range
· Nonoperating temperature: -4 to 149°F (-20 to 65°C)
· Nonoperating humidity: 5 to 95 percent relative humidity (noncondensing)
· Nonoperating altitude: 0 to 15,000 ft (0 to 4570m)
· Operating temperature: 32 to 104°F (0 to 40°C)
· Operating humidity: 10 to 85 percent relative humidity (noncondensing)
· Operating altitude: 0 to 10,000 ft (0 to 3000m)

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