Table of Contents

Introduction
DAS EOS Announcement
Product Overview
Key Features and Benefits
Specifications
Ordering Information

EOS: Cisco Dial Access Switching System

Introduction

DAS EOS Announcement

Cisco Systems is officially announcing the end of sales of the DAS product line with an effective date of April 30, 2000. DAS customers will be able to obtain service and support on DAS hardware for a period of five years after the end of sales announcement date, and on DAS software for a period of three years after the last major software release.

For more information, see http://www.cisco.com/warp/customer/cc/general/bulletin/wan/1043_pp.htm

Product Overview

The Cisco Dial Access Switching (DAS) system provides ISDN dial access into Frame Relay networks through Cisco BPX 8600 series, Cisco MGX 8220, IGX 8400 series, or IPX switches.

The three primary applications for dial access switching include the following:

• ISDN backup of leased-line access to a Frame Relay network

• ISDN access to Frame Relay as an overflow for an existing leased line

• ISDN access to Frame Relay for occasional users (such as small branch offices or telecommuters) at a significant savings over the cost of leased lines

DAS can be configured as a dial-up or as a dial backup application. When configured as a dial-up application, connections are made from the ISDN line to preconfigured permanent virtual circuits (PVCs), and unique data-link connection identifiers are assigned. This application can also be used to provide additional bandwidth over ISDN if a leased line becomes overloaded.

If DAS is configured for dial backup, Dial Access Switching tears down the existing PVCs used by the leased line and replaces them with PVCs connected to the ISDN line. For the ISDN connection, Dial Access Switching uses the same DLCIs used for the leased line.

The DAS functionality of a single system can be distributed throughout an IPX/IGX 8400 series or a BPX/Cisco MGX 8220 network. PRI ports on many different switches can be configured as dial access switching dial-up ports, and the DAS system performs the connection setup for these ports on remote switches.

The DAS is based on approved standards from AT&T, Northern Telecom, ETSI, NTT, AUSTEL, and the Frame Relay Forum.

The DAS 1.4 is offered on IPX/IGX 8400 series or BPX/Cisco MGX 8220 networks in conjunction with switch software release 8.1, with support for SWSW Release 8.4 in trials. DAS 2.1 will add the capability to have redundancy, and will operate with SWSW 9.1.

Key Features and Benefits

Dial access switching has the following features:

• 4ESS/5ESS protocol

• DMS 250 protocol

• ETSI Euro ISDN protocol

• NTT (Japan) protocol

• AUSTEL (Australia) protocol

Specifications

For hardware specification information, access Cisco Connection Online at http://www.cisco.com.

For software specification information, access Cisco Connection Online at http://www.cisco.com.

Ordering Information

Posted: Wed Sep 27 05:15:54 PDT 2000
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