ZyXEL READIES INDUSTRY'S FIRST LINE OF V.34 MODEMS WITH ISDN
UPGRADEABILITY

New Modems Combine Fax, Cellular, Voice and High Speed Ports for
Comprehensive Communications Solution

Las Vegas, Nev., November 14, 1994 -- ZyXEL, a leading supplier of
highspeed data/fax, cellular modems and voice capabilities, today
previewed its new V.34 modems at Fall Comdex '94 in booth #L5214.

Supporting the official V.34 international standard for 28.8Kbps data
communication, ZyXEL modems have been engineered to optimize the new
standard and will be among the first to offer the ability to upgrade to
ISDN. The product line consists of internal, external and portable,
incorporating advanced features such as fax and cellular capabilities,
computer telephony applications, both serial and parallel ports and 8Mbyte
DRAM expandability.

Consistent with the company's charter to provide reliable, full-featured
products, ZyXEL has resisted market-pressure to release its V.34 modems
early. "Our policy has always been to quality engineer our products to be
consistent with the latest industry standards. We also conduct thorough
field testing of all of our products in real-world application
environments. This way, our users are assured that the ZyXEL V.34 modems
are 100 percent compatible with the standard and with other modems," said
Gordon Yang, president of ZyXEL.

The company is readying its V.34 modems which will have a wide-range of
built-in and standard features for shipment in the first quarter of 1995.
"The same manufacturers who rushed to market with a very fast modem are
those who are offering a base model that simply provides users with speed.
ZyXEL modems, on the other hand, incorporate more standard features than
any other V.34 modem. We've combined the best features with the most
advanced technology to provide a modem that will give users the ultimate
power in communications," explained Munira Brooks, marketing manager for
ZyXEL.

ISDN Upgradeability

ZyXEL has engineered its V.34 modem family to enable users to easily
upgrade to ISDN. This capability is intended to provide maximum
flexibility for those who wish to tap into ISDN as it becomes available.
To upgrade the modem, users will simply open the casing and replace the
V.34 module with an ISDN module which will be available through ZyXEL.

According to Brooks, deployment of ISDN is a growing issue with companies
worldwide "Users are now evaluating the advantages of adopting V.34 modems
while ISDN is also emerging as a viable alternative. With communications
technology advancing so rapidly, we wanted to ensure a smooth migration to
ISDN. We believe it is an important benefit to provide users with a growth
path that allows them the option to upgrade to ISDN and guard against
obsolescence," continued Brooks.

Feature-Rich Modems Set New Standard

Included among the wide-array of features are both a serial and parallel
port for high performance computer connections. The serial port supports
speeds up to 230.4Kbps. For high speed data transfers the parallel port
interface can connect to the bi-directional PC parallel port or directly
to a printer to print faxes.

The design of ZyXEL's new modem family adheres to the Telephony Service
Providers Interface (TSPI), enabling a wide range of integrated telephony
applications. By employing a Telephony Applications Programming Interface
(TAPI) the user can set-up a voice answering system, detect a hang-up,
record connection time, or switch between operator and computer
answering.

Dual Tone Multiple Frequency (DTMF) tones are supported and provide the
capability to navigate through individual and departmental mailboxes,
select faxback documents, and initiate call forwarding and paging.

Implemented within the new line of modems is VoiceView, an open protocol
developed by Radish Communications Systems. VoiceView enhances the
exchange of both voice and data during a single phone call and defines a
common way to exchange data and graphics.

"We believe that it is essential to provide a solid technology foundation
that would support the convergence between modems and telephones. That's
why we adopted TSPI, making TAPI possible and the new VoiceView protocol,
which together make our modems an ideal platform for advanced
communications applications," explained Brooks.

Additionally, jacks are provided on the modem for external microphone or
speaker connection and a telephone set can be plugged into the modem's
phone jack for voice message recording or playback.

The ZyXEL V.34 modems automatically detect whether information is data or
fax. By connecting the modem through the parallel port to a laser printer,
the user can receive printed copies of the fax. Additionally, users have
the ability to add on an 8Mbyte DRAM module which enables the extra memory
needed to automatically receive faxes without the user being present.

Another standard feature of the new modem family is the ability to transfer
data over cellular lines. The company's ZyCellular data pump technology
provides reliable high speed data communications over cellular lines,
transmitting data in asynchronous and synchronous mode at speeds up to
14400bps. ZyXEL V.34 modems provide a very low bit error rate in
synchronous mode and exceptionally high throughput in asynchronous
communications.

This capability makes it possible for a ZyXEL V.34 modem user to
communicate in remote areas where normal phone lines are not available.
The user can easily connect the modem: a laptop or notebook and a cellular
phone with an RJ-11 interface to create a cellular connection. In the
cellular environment, ZyXEL modems will automatically determine and
maintain the best operating speed and connection under adverse line
conditions, including hand-off, noise interference and power level
changes.

ZyXEL is noted for incorporating a wide range of standard and intelligent
features throughout its product line. These features will also be included
in the new V.34 modems and include call-back security with password
protection, asynchronous/synchronous modes, caller ID, distinctive ring,
fast retrain with auto fall-forward/fall-back and line condition
monitoring.

The ZyXEL V.34 modem family provides data speeds as high as 28.8Kbps for
the, fastest transmission rate with V.34 compliant modems. ZyXEL V.34
models will continue to incorporate the ZyXEL 19200bps and 16800bps modes
for proprietary speed connections with other ZyXEL Ultra High Speed
modems. The product line will support the V.34 protocol and all lower
speeds, in addition to popular ITU-T protocols including V.32, V.32bis,
V.42 and V.42bis.

Availability

Among the ZyXEL V.34 product line, the Elite 2864 model will be the first
available for shipping in the first quarter of 1995. This model includes
21 informative LEDs, versatile telephone interface, serial and parallel
ports, 8Mbytes DRAM expandability and ISDN upgradeability.

Company Background

ZyXEL, headquartered in Anaheim, California, is a leading supplier of
highspeed modems and compatible data communication products including
V.34/V.32bis modem/faxes with voice, cellular and ISDN capabilities. ZyXEL
modems support UNIX, DOS, Windows and Macintosh platforms. Since its
inception, ZyXEL has been building a reputation as the price/performance
leader in modems by providing high-quality products at affordable prices.

ZyXel
4920 E. La Palma Ave
Anaheim, CA 92807
714-693-0808,  fax 714-693-8811,  BBS 714-693-0762

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