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AE-D440F-TC

June 1980

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Document:	10.78.05 8006 DECnet Phase II Products
Order Number:	AE-D440F-TC
Revision:
Pages:	4
Original Filename:	http://bitsavers.org/pdf/dec/spd/10.78.05_8006_DECnet_Phase_II_Products.pdf

OCR Text

momoomo

Software Product Description
PRODUCT NAME: OeCnet Phase II Products, Version 1.0
DESCRIPTION:
DECnet Phase II is the collective name for the set of
software products that extend various DIGITAL operating systems by enabling the user to interconnect
systems to form computer networks. The DECnet
Phase II products include DECnet-IAS Version 2.1,
DECnet/E Version 1.1, DECnet-RT Version 1.1,
DECnet-VAX Version 1.3, and DECnet-20 Version 2.0.
DECnet allows the user to build networks from a range
of systems and communications components (CPUs,
operating system software, line interfaces and speeds)
in order to satisfy widely varying application needs.
DECnet allows users to interconnect systems using
serial asynchronous, serial synchronous, and parallel
facilities. When configuring DECnet systems, both
ends of any given link must use the same type of communications discipline (e.g., synchronous, asynchronous, or parallel) running at the same line speed.
DIGITAL Network Architecture
DECnet includes a set of layered network protocols,
each of which is designed to fulfill specific functions
within the network architecture. Collectively, these
protocols are known as the DIGITAL Network Architecture, or DNA. The major protocols and their functions are:
DIGITAL Data Communications Message Protocol
(DDCMP) - DDCMP handles the physical link traffic
control and physical link error recovery within DECnet.
DDCMP operates over both full- and half-duplex facilities, using serial synchronous or serial asynchronous
facilities in a point-to-point mode. DDCMP has the
following important characteristics:
• Operates over a wide variety of hardware types
• Makes efficient use of full-duplex channel capacity
• Allows transmission of all data types (including
binary with low overhead)
• Allows standard (character-oriented) communications hardware to be used

June 1980

SPD 10.78.5

• Uses CRC-16 for error detection, with recovery by
retransmission
• Effective on earth/satellite links (or other links) with
long signal propagation delays
A full specification for DDCMP, Version 4.0 is available
on request. DDCMP is not a proprietary protocol;
DIGITAL allows others to implement and use the protocol, provided that an acknowledgement of the source
is made in any public documentation.
Network Services Protocol (NSP) - NSP handles network management functions within DECnet. This
includes sending messages between two nodes and
routing messages within any given node. By establishing a logical communications channel (or logical link),
NSP makes it possible for two programs on different
machines to exchange data. These programs need not
be aware of either the nature of the physical link (full/
half duplex, parallel or serial) or the nature of the protocols supporting the physical link. NSP has the following important characteristics:
• Dynamic creation of logical links between tasks
• Exchange of data between tasks on a solicited basis
• Exchange of data between tasks on a non-solicited
(e.g., interrupt) basis
• Ability to connect nodes dynamically within the
network once NSP initialization occurs over a previously established physical link
A full specification forthe NSP, Version 3.0 is available
on request. NSP is not a proprietary protocol.
Data Access Protocol (DAP) - DAP enables programs
on one node of the network to use the I/O services
available on other network nodes. Some DECnet products provide facilities for translating the operating
system's unique I/O calls into the DAP standard, and
vice versa. Thus, DAP enables data requests to be
processed in a meaningful way by many (possibly
heterogeneous) operating systems. DAP's facilities
include:

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OECnet Phase II Products, Version 1.0

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remote file access, including OPEN, READ, WRITE,
CLOSE, and DELETE for sequential and random
access files, and command files.
It should be noted that each DAP function requires
support at both ends of the link. At the local node,
where the user program initiates a data request, the
DAP support must package the request for transmission through the network. At the remote node (where
the device or file resides), the DAP support must cause
the appropriate actions to be performed. Not all systems support both local and remote portions of each
DAP operation.

A. full specification for the DAP, Version 4.1 is available
on request. DAP is not a proprietary protocol.
DEGnet Functions

DIGITAL Network Architecture (DNA), implemented
across a wide range of operating systems and hardware configurations, enables users to build a variety of
networks. While such networks have a common attribute, individual systems in the, network can have certain
system-specific attributes. The common attribute is
• Task-to-task communication: Programs or tasks on
one system can create logical links and exchange
data with programs or tasks on other systems in a
real-time fashion.

operating systems at both ends of the physical link.
This and the preceding feature simplify the operation of network systems that do not have mass storage devices.
Table I provides the information for determining if the
preceding functions are available on a particular
DECnet system. Note tha.t the above descriptions
define the minimum capabilities provided by a given
function. Additional capabilities, above those
described as the minimum for a function, may be available between two of the same or different DECnet
systems.
Configuring DEGnet Networks

DECnet provides a basic level' of interconnection
between specific products. However, each DECnet
system has its own level of functions. The user can
recognize specific constraints when configuring a
network of heterogeneous DECnet systems. Table"
lists the communication interfaces supported by each
DECnet Phase" product for a particular class of line
characteristics (e.g., 9.6 kilobits/second, synchronous). Each column lists the connections that are permissible forthose line characteristics in cross-product
network configurations. Individual product SPDs must
be consulted to determine whether any particular configuration violates the maxim,um number of communications interfaces and line speeds for an individual
product.

Additionally, many DECnet systems support otherfeatures that are useful in a network environment. These
include

TRAINING CREDITS:

• Inter-system File Transfer: This facility allows an
entire data file to be moved between systems, at
either program or operator request. The common
file type supported across systems that provide this
function is sequential ASCII.

No training credits are included with a DECnet software license. Training courses on DECnet software are
scheduled at regular intervals in DIGITAL's Training
Centers. Arrangements should be made directly with
DIGITAL's Educational Services Department.

• Command/Batch File Submission: Local users can
submit batch or command files to remote systems
for execution.

PRODUCT SUPPORT:

• Command/Batch File Execution: Remote users can
cause a batch or command file that resides at a
remote node to be submitted for execution at the
local node.
• Remote File Access: Tasks or programs can access
sequential files on a record-by-record basis from
files located on remote nodes.
• Down-line System Loading: Initial memory images
for DECnet-11S systems in the network can be
stored on the local system, and loaded on request
into other systems in the network. Remote systems
usually require the presence of a network bootstrap
loader, implemented in read-only memory.
• Down-line Task Loading: Programs to be executed
on DECnet-11 S systems in the network can be
stored on the local system, and loaded upon request
into other systems, under the jOint control of the

DECnet Phase" products are DIGITAL Supported
software products. A Network Profile and DECnet Customer Support Plan covering all intended network
nodes and their support must be prepared jOintly by
the customer and DIGITAl.
The customer may purchase DECnet Phase II product
license options that do not include support services.
The category of support applicable to such software is
Customer Supported. When a DECnet product option
that does not include support services is connected to
a DECnet network, the category of support applicable
to all DECnet products in that network is Customer
Supported.
INSTALLATION SERVICE:
The installation of DECnet Phase " software under
DIGITAL Supported/DIGITAL Installed shall consist
of
1. Verifying that the software kit contains all software
modules and manuals offered.

SPD 10.78.5

OECnet Phase II Products, Version 1.0

-32. Generating the DECnet software.
3. Demonstrating the use of the majority of operator
commands and system utilities.

the terms and conditions of a separate Software Program Sources License Agreement between Purchaser
and DIGITAL.

5. I ntroducing the customer to the sources of software
information and services.

When multiple systems are connected in a single network, each individual system must be licensed separately with regard to both operating system and DECnet
software.

Before installation of the software, the customer must

ADDITIONAL SERVICES:

1. Obtain, install, and demonstrate operational to
DIGITAL's satisfaction any modems and other
equipment and facilities necessary to interface
DIGITAL's communications line interfaces and
terminals.

Software Consulting Services are offered on a time and
materials basis to meet specific customer needs. Two
levels of consulting services are available:

4. Running a sample DIGITAL-supplied program.

2. Make available to DIGITAL personnel all hardware,
including terminals, to be used during installation
for a reasonable period of time, as mutually agreed
upon by DIGITAL and the customer, until installation is complete.
Delays caused by any failure to meet these responsibilities wi II be charged at the then prevai ling rate for ti me
and materials.
ORDERING INFORMATION:

All binary licensed software, including any subsequent
updates, is furnished under the licensing provisions of
DIGITAL's Standard Terms and Conditions of Sale,
which provide in part that the software and any part
thereof may be used on only the single CPU on which
the software is first installed, and may be copied, in
whole or in part (with the proper inclusion of the
DIGITAL copyright notice and any DIGITAL proprietary notices on the software) only for use on such CPU.
All source licensed software is furnished only under

Level I Services
OJ680

-S- DECnet Level I Services (media: Z)

Level I services provide for the integration of DECnet
nodes that carry DIGITAL Installed/DIGITAL Supported support into an interconnected network, with
verification of network integrity and demonstration of
DECnet functions. Level I services use DIGITAL
sample procedures only.
Level II Services
OS912

-S- Daily Software Consulting Services
(media: Z)

OS926

-S- Weekly Software Consulting Services
(media: Z)

OS922

-S- 6-Month Resident Software Consulting
Services (media: Z)

OS924

-S- 12-Month Resident Software Consulting
Services (media: Z)

Level" services provide for additional support as mutually agreed upon by DIGITAL and the customer in the
DECnet Customer Support Plan.

oeCnet Phase II Products, Version 1.0

SPD 10.78.5
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TABLE I

DECnet-IAS
Version 2.1

DECnet/E
Version 1.1

DECnet-RT
Version 1.1

DECnet-VAX
Version 1.3

DECnet-20
Version 2.0

Task-to-Task

YES

Intersystem
File Transfer

YES

Com mand/Batch
File Submission

Requestor
Server

YES
YES

YES

Command/Batch
File Execution

Requestor
Server

YES
YES

YES

YES
YES

Remote File Access

Requestor
Server

YES
YES

NO
YES

YES
YES

NO
NO

Down-line
System Loading

YES

Down-line
Task Loading

YES

Requestor - Requests Service
Server - Provides Service

TABLE II

EIA
$ync
~ 19.2K
bits/sec

EIA
Async

~sync

EIA
Sync

_9.6K
bits/sec

~9.6K

bits/sec

DECnet-iAS
Version 2.1

DL11-E
DZ11-AlB

DL 11-C/WA
DZ11-C/D

DP11
DU11-DA
DUP11-DA
DV11
DQ11-DA

DMC11-AR-DA

DECnet-RT
Version 1.1

DL 11-E

DL 11-C/WA

DU11-DA
DUP11-DA
DUV11-DA

DMC11-AR-DA

DECnetiE
Version 1.1

DMC11-AR-DA

DECnet-VAX
Version 1.3

DMC11-AR-DA

DECnet-20
Version 2.0

DN20-BA
(KMC/
nUP11-DA)

~9.6K

20mA

Remote
Sync

Local
Sync
56K
bits/sec

Local
Sync
1M
bits/sec

Local
Parallel

DMC11-AL-MD

DMC11-AL-MA

DA11-B/AL

DMC11-AR-FA

DMC11-AL-MD

DMC11-AL-MA

DMC11-AR-FA

DMC11-AL-MD

DMC11-AL-MA

DMC11-AL-MD

DMC11-AL-MA

DN21-BB
(DMC11-ALMD)

DN21-HA
(DMC11-ALMA)

~56K

bits/sec

DN21-BA
(DMC11-ARFA)