Specifications

6 MultiModemISI Hybrid Series, ISIHI-2S/2U

Chapter 1—Introduction

a multiport hybrid ISDN card for Remote Access Server (RAS) applications. Included on

the ISIHI-2S/2U 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/2U. 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/2U 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).

RJ-45 jack

Com Ports

Line 1

Line 2

Modem

3456

ISDN

RJ-45 jack

elcome to Multi-Tech’s new MultiModem Hybrid Series, model ISIHI-2S/2U,