[from an AT&T Microelectronics press release]

AT&T Microelectronics has announced a new high speed modem chipset designed to
provide reliable data communications over the existing cellular phone network
and to make it easy for vendors to provide interfaces between modems and
cellular phones.

Under an AT&T license agreement with Spectrum Information Technologies, Inc.,
AT&T V32Cell(tm) modem chipset customers can design and sell modems based on the
V32Cell chipset without concern about infringing Spectrum's patents. The V.32bis
and V.17 FAX modem chipset also adds MNP(r) 10 (Microcom Networking Protocol(tm)
Class 10) for improved data reliability on cellular channels and offers "direct
connect"  to AT&T 3730 cellular phones.

"The AT&T V32Cell modem chipset lets our customers build modems that deliver
high performance cellular data communications,"  said Haig Sarkissian, Manager,
Market Development, AT&T Microelectronics. "In addition, AT&T V32Cell chipset
customers no longer have to worry about Spectrum's patents,"  he said. "That
will be particularly important to customers who want to design products without
obligation to Spectrum."

AT&T signed a patent license agreement with Spectrum on May 11, 1993.  AT&T
Microelectronics is the only semiconductor manufacturer able to provide modem
chipsets covered under Spectrum patents.

Among the features supported by the AT&T V32Cell modem chipset are: 9,600 and
14,400 bit-per-second data, 14,400 bps fax, the AT-command set, error-correction
and data- compression features specified under CCITT V.42/V.42bis, Microcom's
MNP10 and MNP4/MNP5 standards.  The "direct connect" feature enables the modem
to plug directly into a cellular phone via cable without any additional
equipment.

Spectrum has indicated it will develop software for the AT&T V32Cell chipset
that will enable modems to communicate directly with a variety of cellular
phones.  This software would be available directly from Spectrum.

The AT&T V32Cell chipset consists of the AT&T Modem Controller, the AT&T DSP
16A-V.32 digital signal processor, the V32INTFC chip, and the T7525 Codec. The
chipset is available in TQFP (Thin Quad Flat Pack) packaging, which is designed
for PCMCIA form-factor modems only 5 millimeters thick and the size of a
credit-card.

The four chips fit into a 1.5 square inch area.  Typical power consumption for
an entire PCMCIA V32Cell modem is around 0.5 watts. The four chips include a
sleep mode that takes power consumption for the set down to 15 milliwatts.

The V32Cell complete modem chipset will be available on June 1, 1993.  The
four-chip chipset is priced, in quantities of 10,000, at $89.00 in TQFP
packaging.  The V32Cell three-chip data pump chipset is priced at $69.00 in
quantities of 10,000 and TQFP packaging.

For product literature, call the AT&T Microelectronics Customer Response Center,
1-800-372-2447 Ext.  880 (in Canada, 1-800-553-2448, Ext.  880); fax number
+1-215-778 -4106 (especially for customers outside of North America); or by
writing to AT&T Microelectronics, Dept.  AL-500404200, 555 Union Boulevard,
Allentown, Pa., 18103.