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.he //ETHERNET PRODUCT BRIEF
.fo //Page #/December 21, 1984
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{_COVER:_}  
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{_Title:_}  ETHERNET GATEWAY Product Brief
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{_Graphic:_}
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Graphic from current product brief
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{_Description_}
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The DOMAIN (R) Networking ETHERNET (R) Gateway consists
of an intelligent transceiver and a floppy diskette 
containing TCP/IP software.  This product provides 
DOMAIN System users with shared access to existing ETHERNET
transport facilities.  With this capability, TCP/IP-ETHERNET
attached DOMIAN Networks, mainframes and
superminicomputers can easily exchange information.
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Higher level services included in the package are a highly
reliable bidirectional file transfer protocol and a Telnet
protocol for unidirectional DOMAIN workstation virtual terminal
services.  Both these services work in conjunction with other
TCP/IP-ETHERNET configured mainframes and
supermincomputers
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The transport, network, and data link level protocols used are
Transmission Control Protocol (TCP), Internetworking Protocol
(IP), and ETHERNET.  The DOMAIN Networking - ETHERNET Gateway
conforms to the IEEE 802.3 standard and is compatible with the
International Standards Organization/Open System Interconnection 
(ISO/OSI) Reference Model.
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BENEFITS
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o  Increases productivity through information interchange
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o  Provides easier application migration path
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o  Implements widely-accepted, cost-effective solution
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o  Minimizes cost per seat
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o  Expands communications capability for all DOMAIN System users
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o  Provides total hardware/software solution
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY COMPONENTS_}
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o  Telnet Protocol -- Telnet lets DOMAIN System users
log into a remote TCP/IP-ETHERNET attached system as if
the DOMAIN node were a workstation physically attached to that
system.
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o  File Transfer Protocol (FTP) -- FTP lets DOMAIN System users and
programs copy files between TCP/IP-ETHERNET attached
systems.  The FTP program can be invoked from either the
sending or receiving system, or from a third system.
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o  User Data Protocol (UDP) -- UDP provides a connectionless, 
transaction-oriented datagram service.  This service lets programs
direct datagrams to specific processes on other TCP/IP-ETHERNET attached systems.
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o  Transmission Control Protocol (TCP) -- TCP provides a
connection-oriented byte-stream service that is reliable
and flow controlled.  (TCP is built on top
of the Internetworking Protocol.)  TCP lets user programs perform
true interprocess communications with processes that may
reside in the same system, other systems on
the same network, or other systems on different networks.
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o  Internet Protocol (IP) -- IP provides a connectionless
datagram service that transparently forwards messages
through the Gateway.
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o  Communication Controller and Transceiver -- This provides an IEEE 802.3
compatible non-progrommable ETHERNET interface. 
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These integrated components provide DOMAIN System users 
with easy-to-use, high level services and a widely accepted access
method to other TCP/IP-ETHERNET attached mainframes and
superminicomputers.
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY OPERATING ENVIRONMENT_}
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The DOMAIN Networking ETHERNET Gateway operates under
either the AEGIS (TM) or AUX environment (Apollo's implementation
of UNIX (TM) software.
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{_DOMAIN GATEWAY SERVICES_}
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Each DOMAIN workstation has equal access to ETHERNET Gateway
services.  The ETHERNET Gateway Communications Controller
can be installed in any of the following devices:  a DSP80
or a DSP160 Server, a DN660 or a DN460 user node equipped
with a Peripheral-to-Node Adaptor (PNA) or a DN550
user node equipped with a MULTIBUS (TM) Peripheral Adaptor. 
Once installed, the ETHERNET Gateway Communication Controller
can perform Gateway services for a community of DOMAIN System users.  
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The Gateway Server configuration removes the computational
overhead and expense burden from individual DOMAIN workstations,
while providing ETHERNET access and predictable node performance.
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Gateways can be added to the DOMAIN Local 
Area Network for expanded communications capacity.
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY FEATURES_}
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o  Provides shared, cost-effective, and reliable Gateway
services to a network of DOMAIN System users
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o  Includes an non-programmable ETHERNET communications
controller and a transceiver 
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o  Provides bidirectional file transfer and unidirectional
virtual terminal services
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY CAPABILITIES_}
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o  Error checking, guaranteed delivery, and flow control
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o  Third-party invoked file transfers
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o  Active and passive opens
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o  Host name, internetwork address mapping
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o  Full duplex connection
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o  Utilities for status report generation, gateway 
table generation, and network interface initiation
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY FILE TRANSFER SERVICES_}
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The File Transfer Protocol (FTP) lets you transfer
files between a DOMAIN local area network and a remote
TCP/IP-ETHERNET attached host, or another DOMAIN local
area network.  FTP can be invoked by the sending or receiving
party, or by a third party.  In addition, current status
information can be obtained about remote file systems.
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The interactive FTP commands provide a variety of capabilities
intended to enable effective and efficient execution of desired
operations.  
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o  Access Control Commands -- let you identify yourself to a remote
host.
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o  Data Transfer Commands -- let you describe the format of the
data you are transferring
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o  Services Commands -- let you transfer data and request the
remote host to perform various functions.
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o  Miscellaneous Commands -- let you perform helpful 
shell functions while in the FTP program.
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{_DOMAIN NETWORKING -- ETHERNET GATEWAY TELNET SERVICES_}
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Telnet lets users log in to a remote TCP/IP-ETHERNET attached
host using the Telnet virtual terminal protocol.  Using Telnet,
users connect to a remote host, log in, and use the services of the
remote host as if it were a local ASCII TTY terminal. 
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Telnet has two modes of operation -- command and  data.  In command mode, users
use the Telnet commands to describe their  connection to the
remote host and to control the tranfer of data with the remote host.
In data mode, users can send and receive data to and from a remote host.
All data typed at the keyboard is sent to the remote host and
received data is sent to the transcription pad.  Users can change Telnet
operating modes with a single function key. 
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APOLLO and DOMAIN are registered trademarks of Apollo Computer Inc.
AEGIS is a trademark of Apollo Computer Inc.
MULTIBUS is a trademark of Intel Corporation.
UNIX is a trademark of Bell Telephone Laboratories, Inc.
ETHERNET is a registered trademark of Xerox Corporation.
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The materials contained herein are summary in nature, subject to change, and intended
for general information only.  Details and specifications concerning the use and 
operation of Apollo Computer equipment and software are available in the applicable technical
manuals, available through local sales representatives.
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