Bay Networks BayRS Bedienungsanleitung PDF herunterladen (Seite 4)

Up to two WAN adapter modules can

be inserted into the router. The modules

ensure easy, cost-effective upgrades to

newly available, higher bandwidth WAN

services while preserving the initial

router investment (see Figure 2).

WAN adapter module options

Serial

The serial interface supports V.35,

RS-232, RS-449/422 balanced, RS-

530, and X.21. Using either internal

or external clocking, serial interfaces

can be operated at speeds from 1200

bps to 2.048 Mbps, full duplex, and

support the use of T1 and E1 services.

The ARN router’s serial interfaces can

also be used to integrate remote site

SNA devices such as SDLC and BSC

controllers, allowing them to share

WAN access with a site’s LAN traffic.

Nortel Networks support of BSC Pass-

Through allows customers to converge

BSC 3270 device traffic. Automated

teller machine traffic, for example, can

be put on a high-performance, multi-

protocol IP backbone, eliminating

costly dial-up BSC links. Using

standard TCP/IP as the internetwork

transport, dynamic rerouting capability

provides added resiliency for mission-

critical BSC data.

ISDN Basic Rate Interface (BRI)

Supplying two 64-kbps B-channels for

data and one 16-kbps D-channel for

signaling, ISDN BRI adapter modules

provide an integrated, high-performance

solution for companies interested in

using the extensive dial services offered

by Nortel Networks. They include Dial

Backup, Dial-on-Demand, and

Bandwidth-on-Demand.

ISDN BRI options are available

with or without an integral Network

Termination 1 (NT1) device, allowing

users to choose the solution that best

fits the requirements of each site. The

ISDN BRI “U” adapter module

provides the necessary integral NT1

interface for direct connection to most

North American ISDN BRI networks.

For locations where the NT1 interface

is provided by a service provider or

Public Telephone and Telegraph

(PTT) company, the ISDN BRI “S/T”

adapter module ensures the necessary

connectivity. Both ISDN BRI modules

support worldwide signaling specifica-

tions (see Table 1).

T1/Fractional T1 Data Service Unit/

Channel Service Unit (DSU/CSU)

The T1 and Fractional T1 (FT1)

DSU/CSU module offers high-speed

connectivity to the digital services net-

works in North America. It is capable

of operating at fractional T1 rates, in

increments of 64 kbps, up to 1.544

Mbps. Users can customize the DS-0s in

the FT1 connection. For example, users

can select DS-0 # 1, 5, 15 and 18 to

make up a 256-kbps Fractional T1 link.

This module is designed to support one

logical channel per one physical inter-

face, typical of a remote branch office

requirement. Extensive diagnostic and

test functions—such as loopback and

Bit Error Rate Test (BERT) tests—are

also built in for easy troubleshooting.

E1/Fractional E1 adapter module

The E1 and Fractional E1 (FE1)

adapter module provides a 2.048

Mbps G.703 interface for high-density

access to a variety of international

communications services.

56/64-kbps DSU/CS

The integral 56/64-kbps DSU/CSU

adapter module provides direct

synchronous access to either 56-kbps

DDS or 64-kbps Clear Channel

dedicated services, facilitating a simpler

connection between the router and the

service provider’s facilities. Extensive

diagnostic and loopback test capabilities—

Table 1: Supported ISDN signaling specifications

PCMCIA Flash

Memory Card

Console and modem ports

Optional V.34

console modem

RPSU

WAN Modules

Base Modules

Expansion Module

Region/Country ISDN Standard

Australia AUSTEL TS013

Europe Euro ISDN (CTR4)

France VN-3

Japan INS-64

North America National ISDN-1

AT&T 4ESS and 5ESS ISDN

Nortel Networks DMS-100 and DMS-250

Figure 2: Front and rear view of ARN

1 2 3 4 5 6 7 8 9 10

Kommentare zu diesen Handbüchern

Keine Kommentare

Bay Networks BayRS Bedienungsanleitung Seite 4

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Software Bay Networks BayRS