Introduction - Multitech ISIHI-2S User Manual

1.1

Introduction

Welcome to Multi-Tech's MultiModemISI Hybrid Series of ISDN BRI server cards. The series consists of eight
models, briefly described in the table below below.
Table 1: MultiModem ISI Hybrid Series Server Cards
Model Bus
Type Accepted
ISIHP-2S PCI
ISIHP-2U PCI
ISIHP-4S PCI
ISIHP-4U PCI
ISIHI-2S ISA
ISIHI-2U ISA
ISIHP-1S PCI
ISIHP-4SD PCI
The 2S/2U and 4S/4U models are all multiport hybrid ISDN cards that can be plugged into a server expansion
slot (PCI or ISA, as listed) for applications that involve ISDN or modem calls over ISDN BRI lines. When the
ISI card is used with Remote Access Servers (RAS), remote users can call in using either modems or ISDN
terminal adapters (TAs). For V.90 modem calls, a 56kbps download speed can be achieved without the
expense of T1, E1, or ISDN PRI lines. S-models use the ISDN "S" interface; U-models use the ISDN "U"
interface.
This manual also describes the ISIHP-1S and the ISIHP-4SD cards. The ISIHP-1S is a revised version of the
ISIHP-2S card that has been altered to accept one ISDN Basic Rate Interface line rather than two. The ISIHP-
4SD is a serial interface card equipped with four terminal adapters only (no analog modems are present). The
ISIHP-4SD is otherwise like the ISIHP-4S/4U models.
The ISIHP-2S/2U contains two terminal adapters and four V.90/K56flex modems. The ISIHP-2S/2U uses two
ISDN BRI lines (each offering two B-channels) to connect to the telco and these connect to its two built-in
terminal adapters. In addition to handling ISDN calls, each terminal adapter can detect analog modem and fax
calls. When analog calls are detected, they are automatically connected to one of the four V.90 modems on
the ISIHP board. In this way, these hybrid cards can handle either ISDN calls or analog modem calls.
Although the ISIHP-2S/2U contains four ISDN TA ports and four analog modem ports, only four ports can be
active at any one time (because only four B-channels are present). See Figure 1-1. The ISIHI-2S/2U function
like the ISIHP-2S/2U units but have an ISA-type bus which requires manual setting of the I/O address and the
interrupt request (IRQ).
The ISIHP-4S/4U works like the ISIHP-2S/2U but contains four terminal adapters and eight V.90/K56flex
modems. The 4S and 4U models each accommodate four ISDN BRI lines. The configuration of modem and
TA ports for the 4S and 4U models is shown in Figure 1-2.
The ISIHP-4SD contains four terminal adapters only (the daughter card containing the eight modems is
absent). Since it accommodates four ISDN BRI lines (each offering two B-channels), it supports eight
independent digital data connections. Each terminal adapter appears as two ports to the server PC using the
ISI card. ISIHx cards also support dial-out applications via their modems or terminal adapters.
MultiTech's ISI Management Software is designed to monitor data traffic and control the modems/TAs of ISIHx
server cards operating in the Windows 2000 Server and Advanced Server OSs. (See the ISI Management
Software User Guide, doc #88301450.)
Lines ISDN
Interface
2 S
2 U
4 S
4 U
2 S
2 U
1 S
4 S
Modem Term. Adap.
Ports Ports
4 4
4 4
8 8
8 8
4 4
4 4
2 2
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Chapter 1 - Introduction
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