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		SUN'S NEW HSI PROVIDES HIGH-SPEED
		   INTER-NETWORK CONNECTIVITY 
 
MOUNTAIN VIEW, Calif. --October 2, 1989-- Sun Microsystems today
introduced an internal board product that allows Sun networks to
transparently interconnect using high-speed transmission facilities
such as T1 in the United States and CEPT in Europe and many other parts
of the world.  The new High-speed Serial Interface (HSI) is part of the
SunNet(TM) family of networking and data communication
products, which implement recognized networking standards.
 
The VME board and software that make up HSI provide a simple,
cost-effective solution to enlarging networks over wide areas.
HSI delivers the high-speed connectivity necessary to bring distributed
computing applications to geographically separate Sun workgroups.
 
Traditionally, the connections between local area networks (LANs) have
slowed down overall network communication.  HSI helps users utilize the
increasing speed of LANs by enabling Sun networks to be connected at
1.544 megabits per second with standard T1 lines, or at 2.048 megabits
per second with standard CEPT lines.  Two Sun processors can work
together to connect up to four T1 lines for even higher-speed
communication between local workgroups.  This makes possible much
higher-performance wide area inter-network routing than was available
in the past from Sun.
 
HSI is installed in a Sun workstation or server.  It has two ports and
can support up to two T1 or CEPT lines, depending on the speed and
configuration of the host machine.  It does not require a dedicated
host, so that the workstation or server can perform other tasks while
connecting to T-1 or CEPT lines.  In conjunction with other SunNet
products, which support Ethernet, FDDI (Fiber Distributed Data
Interface), X.25 and slower network speeds, HSI makes Sun systems a
flexible interconnection solution for a heterogeneous networking
environment.
 
HSI is priced at $6,000 (U.S. list) and is available immediately for
both Sun-3(TM) and VME-based SPARC(TM) systems.
 
 
Sun Microsystems, Inc., headquartered in Mountain View, Calif., is a
leading worldwide supplier of network-based distributed computing
systems, including professional workstations, servers and UNIX(R)
operating system and productivity software.
 
###
 
SunNet, Sun-3 and SPARC are trademarks of Sun Microsystems, Inc. 
UNIX is a registered trademark of AT&T.  All other products or services
mentioned in this document are identified by the trademarks or service
marks of their respective companies or organizations.   
 
For reader inquiries, telephone 1-800-821-4643 outside California.
Inside California, call 1-800-821-4642. 
 
Press Contact:
Erica Vener (415) 336-3566