Table of Contents

1.1 Purpose
1.2 Product Description

1.2.1 System Features

Hardware Features
Software Features
Compliance

1.2.2 Back Panel Connectors
1.2.3 System Memory
1.2.4 Environmental Constraints

1.3 Network Management, Security, and Billing Applications

The Cisco 676

1.1 Purpose

This chapter provides an overview of the Cisco 676 product. It also describes the general applications available with the Cisco 676.

1.2 Product Description

The Cisco 676 is an Asymmetric Digital Subscriber Line (ADSL) modem for home connectivity to an ADSL service provider network over an ADSL/Asynchronous Transfer Mode (ATM) physical layer. The Cisco 676 receives adaptive rates up to 9.2 Mbps downstream and transmits .8 Mbps upstream .

A 10/100Base-T interface is provided for connection to a Ethernet LAN or Ethernet-equipped PC. The Cisco 676 supports Cisco QuickDial technology for ADSL bandwidth-on-demand.

1.2.1 System Features

The following sections define all system features of the Cisco 676.

Hardware Features

The following features are common to all of the Cisco 676 products:

• Discrete Multitone (DMT Issue 1) Frequency Modulation-based ADSL physical layer

• Rate Adaptive DSL (DMT Issue 1 encoding) interface, with maximum receive data rates up to 9.9 Mbps and transmit data rates up to .93 Mbps for the Cisco 676

• Near-symmetric data rates support up to 1 Mbps bandwidth upstream and downstream on the ADSL interface

• Auto-negotiating 10Base-T or 100Base-TX Ethernet interface, compliant with IEEE 802.3 and 802.3u Fast Ethernet

• ATM cell delineation adherent to ITU-T I.432

• Supports ATM Forum-compliant permanent virtual circuits (PVCs)

• Status LEDs indicating Ethernet and ADSL activity

• Fully compatible with the Cisco 6100 Advanced Digital Subscriber Line Access Multiplexer (ADSLAM) ATM multiplexer

Software Features

Standards Compliance

• ANSI T1.413 Issue 1

• IETF RFC 1661 Point-to-Point Protocol (PPP)

• IETF RFC 1483 encapsulation AAL5

• ATM Forum UNI Version 3.1 PVC

• IEEE 802.3 and 802.3u 10Base-T and 100Base-TX physical layer specification

• IEEE 802.1d transparent learning bridging

• RFC 1638 - BCP

• IP (RFC 791)

  • UDP (RFC 792)

  • ICMP (RFC 791)

  • ARP (RFC 826)

  • RIP version 1 and RIP version 2 updating of routing tables

• Static routing

• RADIUS security and accounting (RFC 2058, RFC 2059)

• DHCP Client and Server

• NAT

Compliance

• FCC Part 15, 1997 - United States Federal Communications Commission Part 15, Subpart B

• CSA Std. C108.8 (1993) - EMC (Industry Canada, Radio Inteference Regulations, Issue 2 1992) Canadian Standard C108.8

• VCCI, 1995 - Agreement of Voluntary Control Council for Interference by Information Technology Equipment (VCCI Japan),August 1995

• AS/NZS 3548: 1995 - EMI (Australia), Spectrum Management Association

• EN55022: 1994/CISPR 22: 1993 - Limits and methods of measurement of radio interference characteristics of information technology equipment.

• EN50081-1:1997 - Electromagnetic compatibility - Generic emission standard, Part 1: Residential, commercial and lilght industry

• CNS 13438 - EMI Standard (Taiwan) regulated by BCIQ Agency

• UL 1950 3rd Edition/CSA C22.2. No. 950

• VDE per EN60950/IEC950 Amendment 4

• CE Marked for EMC and Safety

Bridging Support

• Transparent learning bridge

  • RFC 1483

  • PPP (Bridge Control Protocol)

• Management channel support for remote configuration/management

1.2.2 Back Panel Connectors

The following table describes the function of the connectors and switches on the Cisco 676 back panel. See Figure 1-2 for the location of the connectors described in the following table.

1.2.3 System Memory

The Cisco 676 is equipped with 4MB of Extended Data Out (EDO) DRAM that has a throughput of 60 nanoseconds.

1.2.4 Environmental Constraints

The 676 operates in an ambient temperature environment of 32º to 104ºF (0º to 40ºC) and is stored in an ambient temperature environment of -40ºto 185ºF (-40ºto 85ºC).

1.3 Network Management, Security, and Billing Applications

The general applications supported by the Cisco 676 are:

For more information on each of these applications, see the "Configure Applications" section.

Posted: Wed Jun 9 08:36:01 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.