Bay Networks Remote Annex Instrukcja Użytkownika Pobierz pdf (Strona 2)

Configuring the Nortel Networks Remote Access Concentrators and the DMS-10 for Remote Access.March 31, 1999 2

1.0 Introduction

The Nortel Networks RAC8000 and RAC5399 are Remote Access Concentrators which

provide remote access to the Internet. The RACs provides modem as well as ISDN access

between the circuit switched network and an Internet service Provider Point of Presence

(POP). The RACs interfaces to the DMS-10 through a T1 (DS-1) 1.544Mbps facility,

using either T1 (A/B robbed bit signalling) or ISDN PRI format. The RAC provides 2 T1

ports with 48 digital modems capable of V.34/V.90, X2, K56, or ISDN using V120, PPP

of MLPP.

The Bay Networks RAC8000 and RAC5399 are similar devices and run essentially the

same software. The RAC8000 is 19 inch small rack mount unit which supports two T1

ports and has a single LAN output. The RAC 5399 is a plug in unit, “blade”, which resides

in a System 5000 Multi Service shelf. While the two units are physically different they are

functionally identical.

With the phenomenal growth of the Internet application such as work at home, telecom-

muting, SOHO, etc, the RAC fills a need for remote network access through the DMS-10.

The RAC product fit nicely modem based servers and the high capacity CVX1800.

This document is meant to augment the information provided in the DMS-10 NTP’s and

the RAC documentation. The product respective documentation should be obtained and

understood before configuring the RAC8000 or RAC5399. A Windows NT is assumed to

be available for supporting the RAC. Installing a Windows NT Server requires a under-

standing beyond the scope of this document. A sufficient understanding of the process of

installing Windows NT is assumed. This document is meant to highlight pitfalls that were

discovered is lab setups to demonstrate this White Paper. In the DMS-10 lab a RAC was

configured to accept calls from both a DSI PRI and a DCM Trunk interface. A NT work-

station was configured running the RAC boot software, Event Logging, and RADIUS

security. Analog modem V.90 and V.34 as well as ISDN BRI calls were demonstrated on

both interfaces.

2.0 Applications

Probably the most common application for a Remote Access Server is dial in access for a

Internet Service Provider. In this case the RAS provides an intelligent termination between

the circuit switched public network and the packet switched internet. Figure 1 shows a

typical configuration of a RAC interfacing with a DMS-10. The RAC has two WAN ports

which can be either ISDN PRI or T1 A/B signaling type. The output of the RAC is

10Base-T Ethernet which is connected to the IP network via a router.

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Bay Networks Remote Annex Instrukcja Użytkownika Strona 2