Multi Tech Equipment ISIHI-2S manual Welcome to Multi-Tech’s

Chapter 1– Introduction

Welcome to Multi-Tech’s

new MultiModemISI Hybrid Series, model ISIHI-2S, a multiport hybrid ISDN card for Remote Access Server (RAS) applications. Included on the ISIHI-2S are four V.90/ K56flex central site modems for incoming analog modem and fax calls, as well as two terminal adapters. Each terminal adapter appears as two ports to the server PC using the ISIHI-2S. The terminal adapters identify incoming analog calls and route them to the central site modems. The card also supports dial-out applications via the modems or terminal adapters.

The ISIHI-2S card features eight RAS ports using two Basic Rate Interface (BRI) ISDN lines. The eight ports allow a server to accept any combination of analog modem and digital ISDN calls, giving the user the flexibility to customize the settings of the terminal adapters and modems. Since the two BRI lines constitute only four Bearer channels, only four of the eight ports can be active at any one time. The two terminal adapters handle the four B-channels as four independent data connections (see diagram below).

Com Ports

5

1

2

6

7

3

4

Modem

TA

Modem

Modem

TA

ISDN

RJ-45 jack

3456 Line 1

RJ-45 jack

3456 Line 2

8

Modem

6 MultiModemISI Hybrid Series, ISIHI-2S