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EISA Synchronous Communications Controller

HIGHLIGHTS

o  High speed synchronous communications option for EISA based DEC OSF/1 and
   OpenVMS AXP systems

PRODUCT DESCRIPTION

The DNSES EISA synchronous communications controller is a high speed option
for Digital's EISA based DEC OSF/1 and OpenVMS AXP systems. It enables users
to implement wide area communications in DECnet/OSI, X.25, TCP/IP, and IBM
SNA environments.

The option offers two synchronous ports that can operate at speeds of up to
64 Kbits per second (with the same or different protocols). A single port
can operate up to 2.048 Mbits per second for T1 or E1 clear channel
communications over leased connections (with external DSU/CSU). DEC-HDLC,
LAPB/E, and SDLC protocols are supported at these speeds.

The basic option includes a "Y" cable to run from the option connector to
two communications lines.

AVAILABILITY AND ORDERING

The EISA synchronous communications controller is available now. The adapter
and extension cables required are also available.

Order No.        Description

		 Communications Controller:
DNSES-AA	 EISA synchronous communications
		 controller for DEC OSF/1 and OpenVMS
		 systems; supports two communications
		 lines, requires one EISA slot and
		 additional cables

		 External Cables:
BC19B-02	 EIA-422-A/V.11 adapter cable (extend with
		 BC55D-33)
BC19D-02	 EIA-232-D/V.24 adapter cable (extend with
		 BC22F-xx)
BC19E-02	 EIA-423-A/V.10 adapter cable (extend with
		 BC55D-33)
BC19F-02	 V.35 adapter cable (extend with BC19L-25)

TECHNICAL DATA

Software Support

The DNSES controller is designed to operate with the following DEC OSF/1 and
OpenVMS AXP layered software products:

o  DECnet/OSI V2.0 for DEC OSF/1 systems (SPD 41.92.xx) and DECnet/OSI V5.7
   for OpenVMS AXP systems (SPD 50.45.xx) -- DECnet/OSI supports the use of
   the DNSES for WAN Connectionless Network Service (ISO 8473) links to
   intermediate systems using DEC-HDLC as the datalink protocol.

o  X.25 V1.0b for DEC OSF/1 systems (SPD 42.47.xx) and X.25 V1.0 for OpenVMS
   AXP systems (SPD 47.37.xx) -- Wide area connections to packet switching
   data networks conforming to CCITT X.25 are supported for DECnet/OSI
   systems configured with the DNSES. These connections, using LAPB/E as the
   datalink, can carry DECnet/OSI traffic (per ISO 8878) for X.25
   applications such as X.29 terminal support, or TCP/IP over X.25 (per
   RFC1356) on DEC OSF/1 systems.

o  DEC SNA Peer Server V1.1A (SPD 51.08.02 or later) -- The DEC SNA Peer
   Server software product offers peer connectivity between IBM systems and
   applications and Digital systems and applications, through its support
   for SNA Node Type 2.1 (LEN Node) protocols.

   The DEC SNA Peer Server connects to the IBM SNA environment via SDLC,
   LLC2, or QLLC datalink protocols supporting WAN and LAN access.

Systems Support

The DNSES controller is supported on Digital 2100 Server Models A500MP and
A600MP and on DEC 2000 Models 300 and 500.

__________
OSF/1 is a registered trademark of the Open Software Foundation, Inc.
IBM is a registered trademark of International Business Machines
Corporation.