U.S. Robotics and Microsoft demonstrate new PPTP virtual private networking
at NetWorld+Interop; companies demonstrate first virtual private network
using PPTP over InteropNet

LAS VEGAS, Nevada--(BUSINESS WIRE)--April 2, 1996--U.S. Robotics (NASDAQ:
USRX) will demonstrate PPTP (Point-to-Point Tunneling Protocol) in a joint
effort with Microsoft at this week's Networld+Interop. The two companies
will show a live demonstration of the capabilities of PPTP, a new protocol
that enables virtual private networking - - enabling secure remote access
to corporate networks over the Internet. PPTP will be used at
Networld+Interop to create the first virtual private network over the
InteropNet.  PPTP will help companies deploy remote access to employees
more quickly, using fewer resources, by allowing them to take advantage of
existing enterprise network infrastructures such as the Internet for
remote access.

U.S. Robotics is the developer of the Windows NT PPTP driver, which will be
integrated into Microsoft's upcoming Windows NT Server 4.0. Under an
agreement with Microsoft, U.S. Robotics will license a variety of software
components for PPTP to Microsoft. PPTP will be added as a standard feature
to Microsoft's Windows NT Server and U.S. Robotics' Total Control
NETServer remote access server platform.  

PPTP Provides Added Capability, Seamless Integration with NT

The PPTP protocol further expands the capabilities of U.S. Robotics' remote
access server platform in NT enterprise networks. Running on U.S.
Robotics' remote access server and Microsoft's Windows NT Server, PPTP
streamlines access in NT networking environments, and allows NT network
clients to take full advantage of the services provided by Microsoft's RAS
(Remote Access Service).

For remote access, over analog or ISDN, PPTP creates a "tunnel" directly to
the appropriate departmental NT Server on a network - - even if there are
hundreds of NT Servers. U.S. Robotics NETServer remote access servers
supporting PPTP provide a distinct advantage for NT network managers,
because access to the enterprise may be managed and secured at a single
centralized point, while specific network resource access can be managed
at the departmental level. And, U.S. Robotics' Enterprise Network Hub's
fault tolerant design, which incorporates NETServer remote access server
technology, provides redundancy at that access point, allowing centralized
access, security and management, yet ensuring that there is never a single
point of failure.

This benefits NT users by allowing them to consolidate equipment, decrease
management costs and increase network security. The Enterprise Network Hub
also allows users to scale and expand their remote access solution, with
the flexibility to accommodate analog and ISDN access for a few users or
for several hundred users, depending on the need.

PPTP will also be included in U.S. Robotics' NETServer branch office
products, for smaller networks that need the same secure, centralized
access to NT servers in a smaller, cost-effective platform.

PPTP Technical Features

The PPTP specification builds on standards such as PPP and TCP/IP. PPTP
'tunnels' a remote user's PPP packets from the NETServer to a Windows NT
server. By terminating the remote user's PPP connection at the NT server,
rather than at the remote access hardware, PPTP allows network
administrators to standardize security using the existing services and
capabilities built into the Windows NT security domain. Using PPTP,
network administrators can extend a virtual private network from their
Windows NT server throughout the Internet and still retain control of
their user passwords and accounts.

NT provides its own knowledge of enterprise users, databases, allowed
access and network addressing integrated into its RAS capabilities. With
PPTP, users accessing their NT-based network will utilize these services,
including DHCP and WINS, for access. This greatly simplifies the
management of mobile and telecommuting users accessing an NT- based
network.

The PPTP driver developed by U.S. Robotics was demonstrated for the first
time at Microsoft's Redmond, Washington headquarters in December, 1995.
The NetWorld+Interop demonstration is the first public demonstration of
the capabilities of PPTP.

U.S. Robotics is one of the world's leading suppliers of products and
systems that provide access to information. The company designs,
manufactures, markets and supports remote access servers, enterprise
communications systems, desktop/mobile client products and modems and
telephony products that connect computers and other equipment over analog,
digital and switched cellular networks, enabling users to gain access to,
manage and share data, fax and voice information. Its customers include
Internet service providers, regional Bell operating companies,
inter-exchange carriers and a wide range of other large and small
businesses, institutions and individuals. The company's 1995 sales were
$889.3 million; sales for the first quarter of fiscal 1996 were $364.8
million.
 
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