User guide

Chapter 1 – Introduction and Description
MultiModem ISI Server Cards User Guide 5
digital to analog only once before it reaches your modem. Upstream transmissions and transmissions between
client modems are limited to 33.6 Kbps.
Upstream transmissions to non-V.92-compatible ISPs and downstream transmissions that are converted more than
once on the telephone line are also limited to 33.6K bps.
When calling into the ISI modem with another V92 modem over an analog phone line, the maximum speed
achievable is 33.6 Kbps. V90 or V92 connections are not possible when an analog line is calling another
analog line. Similarly, when the ISI modem is involved in a call between an analog line and a digital line, the higher
V.90/V.92 speeds cannot be used. However, ISI modems can achieve the higher V.90/V.92 speeds when dialing
out to a digital phone line that supports V.90/V.92.
NOTE: Though these modems are capable of 56 Kbps download performance, line impairments, public
telephone infrastructure flaws, and other external technological factors currently prevent
connections from reaching this maximum 56 Kbps speed.
Modems on the ISI Card are Plug and Play capable with interactive automatic dialing and command mode
configuration. In standard mode, you can store up to three command lines or telephone numbers of up to 40
characters each in the modems’ nonvolatile memory. The modems can dial using pulses or tones and can
recognize dial tones and busy signals for reliable call-progress detection. The modems can detect AT&T calling
card tones. They also have DTR dialing, remote configuration, and 11-bit capabilities, and they incorporate self-
resetting lightning protection. Serial port speeds can be set as high as 230,400 bps. They are both FCC registered
for connection without notification to the telephone company.
The ISI Card has full-duplex intelligent modems with V.42 error correction, V.42bis, and V.44 data compression. The
ISI modems support Super G3 ITU-T V.34 fax communications at speeds up to 33.6 Kbps with Class 2.1 fax
commands. The ISI modems also support voice functionality (+V commands).
Driver Installation
If you are installing on a Windows operating system, use the Windows Installer to install the drivers before you
install the hardware. Refer to Chapter 2—Windows Installation
for more details.
If you are installing on a computer running a Linux operating system, install the drivers after the hardware is
installed. Refer to Chapter 4—Linux Installation
for more details.
ISI Reset Utility
Download Multi-Tech’s ISI Reset Utility from the Multi-Tech Systems Installation Resources website. The ISI Reset
Utility allows you to reset the modems associated with the ISI Card in a computer running Windows 2000
Professional, Windows 2000 Server, Windows 2000 Advanced Server, Windows 2003, Windows XP, Windows Vista,
or Windows Server 2008. Refer to Chapter 6 – Reset Utility
for information on installing and using the Reset Utility.
Technical Specifications
Category Description
Computer requirements Microsoft Windows 2003, Windows XP, Windows 2000 Professional, Windows 2000
Server and Advanced Server, Windows Vista, Windows 2008, Windows 7, Linux kernel
2.4.x or Linux kernel 2.6.x.
2 MB of hard disk space
Dimensions: 12.283" x 4.2" / 312 mm x 106.65 mm
Baud Rates: 300 bps to 230 Kbps per port