The Cisco 820 Series of business-class ADSL routers provide business-class functionality for small businesses and corporate teleworkers through the power of Cisco IOS technology. They enable service providers and resellers to increase service revenue by supporting features for stateful firewalls and VPNs, integrated toll-quality voice, and differentiated classes of service. These value-added features, along with the manageability and proven reliability of Cisco IOS technology, provide the mission-critical networking that businesses require.

Part of the award-winning Cisco 800 series, the Cisco 826 & 827 business-class asymmetric digital subscriber line (ADSL) router. With the software-upgradable platform of the Cisco 827, service providers and resellers can increase revenue by offering DSL services today and provide value-added services as customer technology needs grow. The Cisco 827 and Cisco 827-4V support ADSL over POTS (Plain Old Telephone Service) lines while the Cisco 826 supports asymmetric digital subscriber line (ADSL) over ISDN for regions that have a substantial install base of ISDN customers. The Cisco 827 and Cisco 826 are data only models while the Cisco 827-4V supports Voice over IP and Voice over ATM in first half of CY 2001.

The Cisco 826 & 827 ADSL routers are ideal for up to 20 users in a small office or as an enterprise telecommuting solution, supporting scalable, secure, quality, and proven business solutions such as:

Business-class security with support for stateful firewalls and IPSec VPNs
Toll quality voice (Cisco 827-4V)
Differentiated Classes of Service through Quality of Service features

Because the Cisco 826 and 827 ADSL routers are based on Cisco IOS technology, service providers and resellers can leverage their training and investments in Cisco IOS software to reduce their overall costs of doing business. With key management and troubleshooting features, service providers and resellers can cost-effectively deploy and manage the Cisco 826 or 827 router at the business customers` premises, thanks to the following advantages:

Cisco IOS manageability, including interactive diagnostics/debug features
Familiar Cisco IOS command-line interface (CLI)
Proven reliability

Key Features and Benefits

**Table 10-6: Features and Benefits for Cisco 826 & 827 ADSL Routers**
Feature	Benefit
Business Class Security
PAP, CHAP, MS-CHAP, and ACLs	Protect network from unauthorized access
Route and Router Authentication	Accepts routing table updates from only known routers, which ensures no corrupt information from unknown sources is received
NAT/PAT	Hides internal IP addresses from external networks Prevents certain attacks from outside networks on internal hosts
Enhanced Security
Stateful Inspection Firewall with Cisco IOS Firewall Feature Set	Offers internal users secure, per-application dynamic access control (stateful inspection) for all traffic across perimeters Defends and protects against denial-of-service attacks Checks packet headers, dropping suspicious packets Protects against unidentified, malicious Java applets Provides Real Time alerts Details transactions for reporting on a per-application, per-feature basis
IPSec Encryption	Ensures confidential data integrity and authenticity of origin by using standards-based encryption Provides encryption for all users on the LAN without configuring individual PCs with client software.
Integrated Toll Quality Voice/Data (Cisco 827-4V Only)
Four Analog Telephone (FXS) Interfaces	Provides toll quality, award winning derived voice over IP and software-upgradeable to Voice over ATM/AAL2 (CYQ3 "00).
Standards-Based H.323 (H.225) signaling	Allows an ecosystem of third party vendors to develop applications for a complete solution; allows rapid low-cost deployment of Voice over IP
DSPs and Voice Compression Codecs G.711, G.729, G.723.1	Provides hardware based compressed voice to fit significantly more voice lines over a single copper pair without breaking to the end-to-end delay budget.
Differentiated Classes of Service
Quality of Service (QoS)/ Class Based Weighted Fair Queuing	Ensures consistent response times for multiple applications by allocating bandwidth intelligently Allows for classification of applications and gives the most important applications priority use of the WAN line
ATM traffic UBR, VBRnrt, VBRrt and CBR with per VC queuing and traffic shaping	Ensures QoS guarantees for real-time traffic, with ability to send traffic over the appropriate Virtual Circuit to provide ATM level shaping and ensure that no head of line blocking can happen between circuits of different or equal traffic-classes.
Choice of Encapsulation (PPP over ATM and RFC 1483)
PPP over Ethernet	Ensures compatibility with existing network
Lower Cost of Operations
Cisco IOS interactive debug features	Allows service providers to remotely or locally diagnose network problems in detail (e.g. via telnet or terminal connection into the router)
Cisco IOS CLI	Allows customers to leverage existing knowledge of Cisco IOS CLI for easier installation and manageability without additional training
Simplified Set Up, Installation, and Management
Cisco Fast Step Software	Simplifies high volume installation with easy three step, non-technical graphical user interface
NAT/PAT	Lets businesses and service providers conserve valuable IP address space Reduces time and costs by reducing IP address management
Cisco IOS Easy IP	Enables true mobility-client IP addresses to be transparently configured via the Cisco IOS Dynamic Host Control Protocol (DHCP) server each time a client powers up
Color-coded Ports and Cables and Quick Start Reference Guide	Helps users make proper connections Provides easy-to-follow installation instructions Requires no Service Provider truck roll
Remote & Local Management	Remote management and monitoring via SNMP, Telnet or HTTP and local management via console port
Proven Reliability
Cisco IOS Technology	Offers technology that is used throughout the backbone of the Internet and in most enterprise networks.
Safe Investment
Upgradable Memory	Allows customers to add features as networking needs expand
Advanced Processor and Memory Architecture	Ensure the platform can support processor-intensive applications
World-class Support	Helps customers keep their Cisco 800 series routers running all the time

Specifications

Hardware

**Table 10-7: Technical Specifications for Cisco 826, 827 & 827-4V**
Description	Cisco 827 Specification	Cisco 826 Specification	Cisco 827-4V Specification
Processor	MMC 855T RISC	MMC 855T RISC	MMC 855T RISC
Speed	50 MHz	50 MHz	50 MHz
Default DRAM1 Memory	16 MB	16 MB	24 MB
Maximum DRAM Memory	32 MB	32 MB	32 MB
Default Flash2 Memory	8 MB	8 MB	8 MB
Maximum Flash Memory	20 MB	20 MB	20 MB
Analog Telephone Ports	-	-	4
REN	-	-	5 REN/ port
Ethernet	10 Mbps	10 Mbps	10 Mbps
Console	RJ-45	RJ-45	RJ-45
LEDs	7	7	11
Support for Kensington-Style Physical Lock	Yes	Yes	Yes
Stackable	Yes	Yes	Yes
Crossover Hub Switch (To PC - To HUB)	Yes	Yes	Yes
Power Supply	Universal 100-240V AC	Universal 100-240V AC	Universal 100-240V AC

Software

**Table 10-8: Memory Requirements for Cisco 826 & 827 IOS Feature Sets**
Cisco 826 & 827 IOS Feature Sets	Cisco 826 & 827 Memory Requirements
	Flash	DRAM
IP	8 MB	16 MB
IP Firewall Plus IP Sec 56	8 MB	16 MB
IP Firewall Plus IPSec 3DES	8 MB	24 MB
IP/IPX Firewall Plus IPSec 3DES	8 MB	24 MB

**Table 10-9: Memory Requirements for Cisco 827-4V IOS Feature Sets**
Cisco 827-4V IOS Feature Sets	Cisco 827-4V Memory Requirements
	Flash	DRAM
IP	8 MB	16 MB
IP Firewall Plus IPSec 56	8 MB	16 MB
IP Firewall Plus IPSec 3DES	8 MB	24 MB
IP/IPX Firewall Plus IPSec 3DES	8 MB	24 MB
IP Voice	8 MB	24 MB
IP/IPX Voice Plus	8 MB	24 MB
IP Firewall Voice Plus IPSec 56	8 MB	24 MB
IP Firewall Voice Plus IPSec 3DES 1	8 MB	24 MB

Product and Part Numbers

Table 10-10: Part Numbers for the Cisco 827 and Cisco 827-4V

Part Description	Part Number
Cisco 826 router - 1 Ethernet/1 ADSL over ISDN	Cisco826
Cisco 827 router - 1 Ethernet/1 ADSL	Cisco827
Cisco 827-4V router - 1 Ethernet/4 Voice Port	Cisco827-4V
Cisco 827 Platform Memory Options
DRAM Factory Upgrades
Cisco 820 Series 16 -20 MB DRAM factory upgrade	MEM820-16U20D
Cisco 820 Series 16 -24 MB DRAM factory upgrade	MEM820-16U24D
Cisco 820 Series 16 -32 MB DRAM factory upgrade	MEM820-16U32D
Cisco 820 Series 24 -32 MB DRAM factory upgrade	MEM820-24U32D
FLASH Factory Upgrades
Cisco 820 Series 12 -20 MB FLASH factory upgrade	MEM820-12U20MFC

Cisco 826, 827 and Cisco 827-4V — ADSL Routers

Cisco 826, 827 and Cisco 827-4V — ADSL Routers

Product Overview

Key Features and Benefits

Specifications

Hardware

Software

Product and Part Numbers

Table 10-10: Part Numbers for the Cisco 827 and Cisco 827-4V

Cisco 826, 827 and Cisco 827-4V — ADSL Routers

Cisco 826, 827 and Cisco 827-4V — ADSL Routers

Product Overview

Key Features and Benefits

Specifications

Hardware

Software

Product and Part Numbers Table 10-10: Part Numbers for the Cisco 827 and Cisco 827-4V

Product and Part Numbers

Table 10-10: Part Numbers for the Cisco 827 and Cisco 827-4V