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MultiModem ISI Hybrid Series, ISIHI-2S 7
Chapter 1– Introduction
From the perspective of the server PC, the ISIHI-2S is an 8-port serial card with eight
devices permanently attached to the serial ports. The first four ports are the two terminal
adapters, each of which appear as two ports. The remaining four ports are the four
central site modems. The chart below summarizes the correlation of ports and devices.
Port Number Device ISDN Line Number
1TA 1
2TA 1
3TA 2
4TA 2
5 Modem 1
6 Modem 1
7 Modem 2
8 Modem 2
The ISIHI-2S server card is ideal for use in PC network environments because it provides
an integrated hardware solution for remote access for both Windows NT and Novell-
based LANs. To ensure smooth Novell network integ/ration, the ISIHI-2S ships with a
NetWare Loadable Module for NetWare Connect™ communication server that enables it
to support state-of-the-art features such as remote dialing and modem pooling. The
ISIHI-2S easily integrates into the Windows NT platform since it fully supports Microsoft’s
Remote Access Server software, which allows it to operate comfortably with popular
network protocols such as TCP/IP and Net BIOS. The ISIHI-2S ships with drivers for
other multiuser operating systems such as SCO®UNIX®.
This Owner’s Manual will help you install, configure, test, and use the ISIHI2-S. The
manual contains product specifications, installation instructions, and technical support
information to assist you in the installation process. This manual is written for audiences
with basic PC skills; therefore, step-by-step instructions for basic operations such as
logging in and file editing are not included.
Modem Description/Features
ISIHI-2S modems include an Intel 20 MHz 80186 processor and 254K of RAM that work
dynamically to allocate resources to the most active modems.
Simple to install, the ISIHI-2S can be used to add multiport, Enhanced V.34 modem
communications to a network host or server as easily as plugging in an expansion card,
loading the driver software, and connecting the phone lines.
The ISIHI-2S contains four modems, which meet the proposed Enhanced V.34 ITU
standard for data signalling rates as high as 33.6/31.2 Kbps full-duplex mode. They
support and are compatible with EIA extended Automode, adaptive line probing,
automatic symbol rate and carrier frequency during startup, and retrain and rate
renegotiation (in 2400 bps increments.)
The ISIHI-2S features CCITT V.42 error correction and V.42bis data compression,
providing 100% error-free data transmission. V.42 error correction incorporates MNP
Classes 3 and 4 and LAP-M. You can select V.42bis data compression for 4-1 throughput
or MNP Class 5 for 2-1 throughput.