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EK-DEHU2-IN-A01

January 1994

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Document:	DEChub ONE Installation
Order Number:	EK-DEHU2-IN
Revision:	A01
Pages:	26
Original Filename:

OCR Text

DEChub ONE
Installation
Part Number: EK–DEHU2–IN. A01

January 1994

This document describes the DEChub ONE single-slot hub and how to
install DEChub full-height network modules for standalone use.

Revision/Update Information:

This is a new manual.

Copyright
EK–DEHU2–IN. A01
January 1994
The information in this document is subject to change without notice and should not be construed as a
commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any
errors that may appear in this document.
Copyright  1994 by Digital Equipment Corporation
All Rights Reserved. Printed in U.S.A.
The postage-paid Reader’s Comments form at the back of this document requests your evaluation of this
document to assist us in preparing future documentation.
The following are trademarks of Digital Equipment Corporation: DEC, DEChub, DEChub ONE, DECserver,
Digital, MultiSwitch, ThinWire, and the DIGITAL logo.
AT is a registered trademark of International Business Machines Corporation.
FCC NOTICE — Class A Computing Device:
This equipment generates, uses, and may emit radio frequency energy. The equipment has been type tested and
found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection against such radio frequency interference when operated in
a commercial environment. Operation of this equipment in a residential area may cause interference; in which
case, measures taken to correct the interference are at the user’s expense.
VCCI NOTICE — Class 1 Computing Device:
This equipment is in the 1st Class category (information equipment to be used in commercial and/or industrial
areas) and conforms to the standards set by the Voluntary Control Council for Interference by Data Processing
Equipment and Electronic Office Machines aimed at preventing radio interference in commercial and/or industrial
areas. Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be
caused to radios and TV receivers.
Read the instructions for correct handling.
CE NOTICE – Class A Computing Device:
Warning!
This is a Class A product. In a domestic environment this product may cause radio interference, in which case the
user may be required to take adequate measures.
Achtung!
Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes
Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen
verantwortlich ist.
Attention!
Ceci est un produit de Classe A. Dans un environment domestique, ce produit risque de créer des interférences
radioélectriques, il appartiendraalors à l’utilisateur de prendre les mesures spécifiques appropriées.

DEChub ONE

Digital Confidential

Document Name

Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Front Panel and Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting the Single-Slot Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Removing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
AUI Port Cabling

............................................ 9

Setup Port Cabling and Pin Assignments . . . . . . . . . . . . . . . . . . . . . . 10
OBM Port Cabling and Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 11
Problem Solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Associated Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Accessing MIBs, RFCs and Release Notes . . . . . . . . . . . . . . . . . . . . 16

Tables:
1 Problem Solving Using LEDs . . . . . . . . . . . . . . . . . . . . . . . . 12
2 Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Acoustical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

DEChub ONE

iii

Introduction
The DEChub ONE is an Ethernet single-slot hub that provides standalone capability
for Ethernet DEChub 900 full-height modules (also referred to as modules in this
manual). The DEChub ONE provides 90 watts dc to power the attached module. An
attachment unit interface (AUI) on the DEChub ONE can be used to connect the
attached module to a standard Ethernet backbone. An optional medium attachment
unit (MAU) can be connected to the DEChub ONE’s AUI port to adapt the module to a
fiber-optic, ThinWire, or twisted-pair LAN connection.
The DEChub ONE provides an out-of-band management (OBM) port with an
associated LED for remote network management support. A setup port on the
DEChub ONE enables you to configure the attached network module using a
terminal device, personal computer, or terminal server.
The DEChub ONE supports tabletop and rack-mounting. By stacking DEChub ONE
single-slot hubs in19-inch racks, users can buy the Ethernet DEChub 900 modules to
support their current needs in a small LAN and use the same products to upgrade to
enterprise-wide networks as their LAN use grows.

Features
• Enables Ethernet DEChub 900 modules to operate
as standalone devices.

• Flexible mounting configuration helps network
managers cope with daily moves, additions, and
changes in their networks.

• Accommodates Ethernet DEChub 900 modules rated
at up to 90 watts.

• Suitable for tabletop or rack-mounting.
• Rack-and-stack capability offers cost-effective access
to Ethernet and flexible network growth. Stacked
standalone DEChub 900 modules provide a broad
range of LAN/WAN functionality for small work
groups or remote sites.

• OBM port supports remote network management for
attached Ethernet DEChub 900 modules.

DEChub ONE

Introduction (Cont.)

•

Setup port for easy configuration of attached Ethernet
DEChub 900 modules.

•

Media flexibility available using an optional MAU to
adapt Ethernet DEChub 900 modules to twisted-pair,
fiber-optic, or ThinWire cables.

•

Supports Serial Line Internet Protocol (SLIP).

•

Supports Simple Network Management Protocol
(SNMP).

DEChub ONE

Front Panel and Packaging
The DEChub ONE is a member of the DEChub 900 family of products. The
DEChub ONE enables Ethernet, full-height, DEChub 900 modules to operate as
standalone units.

DEChub ONE Connectors, LED, and Optional Equipment
The figure shows a network module attached to the DEChub ONE, forming a
single-slot hub. A MAU (item 7) can be ordered separately from Digital to adapt
the AUI port for use with twisted-pair,ThinWire, or fiber-optic LAN connection.

1)
2)
3)
4)
5)
6)
7)
8)
9)

DEChub ONE
AC power connector
OBM port LED
9-pin OBM port connector
Setup port connector
AUI port and slide latch
15-pin MAU (not included)
Locking L-bracket
DEChub 900 full-height
network module

9
1

8
2

Packaging

7
LKG–7462-93I

A DEChub ONE kit contains the following items:
 DEChub ONE (Digital part number DEHU2–cx)
 Installation manual
 Power cord
 Rack-mount hardware
MAUs can be ordered separately from Digital. Each MAU has its own installation
manual packaged with it. The MAUs connect the DEChub ONE and its attached
network module to a LAN or backbone using one of the three media connections:
 DETPM 10BaseT twisted-pair MAU
 DECXM 10Base2 ThinWire MAU
 DEFLM fiber-optic MAU

DEChub ONE

Back Panel
1
1) Hot-swap switch receptacle
2) 48-pin backplane connector
2

3) Product and certification label
4) Grounding strip
5) 160-pin backplane connector

3
6) Mounting slot

LKG-8722-93I

DEChub ONE

Installing the Module
To install a network module into a DEChub ONE, perform the following steps. Do
not connect the power cord until the module is secured to the DEChub ONE,
mounted (tabletop or rack-mounted), and ready for self-test. Refer to the
Mounting the Single-Slot Hub section and the Connecting the Cables section of
this manual for additional information.

Attach the module to the DEChub ONE
1) Place the mounting tab located on the bottom of the module into the mounting
slot on the bottom of the DEChub ONE, as shown in the figure.
2) Lift the locking L-bracket screw on the DEChub ONE.
3) Pivot the module into place to engage both the 160- and the 48-pin
connectors.
4) Hold the network module and DEChub ONE together and tighten the locking
L-bracket screw. This secures the network module to the DEChub ONE and
activates the network module’s hot-swap switch.

Locking L-bracket

Network Module

DEChub ONE

Mounting tab
PK–07464–IL

DEChub ONE

Mounting the Single-Slot Hub
The single-slot hub may be placed on a table top or mounted in a 19-inch
equipment rack. To use it on a table top, attach four self-sticking rubber foot pads
(provided) on the underside of the single-slot hub, placing two foot pads on the
DEChub ONE and two foot pads on the attached network module. To rackmount a single-slot hub, with the DEChub ONE power off, follow these steps:
1

Connect rack-mount brackets to single-slot hub.
Align the screw holes on each end
of the rack-mount brackets with
the holes on the DEChub ONE
and on the network module.
Attach the brackets using eight
#6-32 flat-head screws.

Position and secure the single-slot hub unit in the equipment rack.
Align the screw holes on the rack-mount brackets with the equipment rack
holes. Attach the rack-mount single-slot hub to the rack using four #10-32
screws and U-nuts.

Connect the cables to the single-slot hub.
Connect the AUI, OBM, and setup ports, as required. Refer to the cabling
sections for information on connecting the AUI port, OBM port, and setup port.

Provide strain relief for the cabling.
Use TyRaps or other suitable means to secure the cables to the rack along the
raceways. Avoid placing undue strain on the cable connectors – do not tighten
the TyRaps excessively or exceed the nominal bend radius of the cables.

Connect the power cord to the single-slot hub power connector and then
to an outlet on the rack or to a wall outlet.
The module begins self-testing as described in its installation manual.

DEChub ONE

Removing the Module
The DEChub ONE can accommodate any DEChub 900 Ethernet module and can
be used anywhere that an Ethernet LAN connection is available. You can easily
swap modules or disconnect the DEChub ONE by following these steps:
1

Shut off the ac power to the DEChub ONE.

Either turn the wall receptacle switch to off or disconnect the ac power cord from
the wall receptacle.
2

Disconnect cables from the DEChub ONE as required.

Disconnect cables from the module as required.

Separate the DEChub ONE from the module.

Loosen and lift the locking L-bracket screw on the DEChub ONE.

Pivot the module away from the DEChub ONE.

Locking L-bracket

Network Module

DEChub ONE
Mounting tab

DEChub ONE

Connecting the Cables
This section provides information on connecting cables to the DEChub ONE and
to the attached DEChub 900 module.
1

Connect the AUI port to the LAN.

Move the AUI port slide latch to the unlocked position (inward).

Insert the appropriate MAU or AUI cable connector into the AUI port.
Cables and MAUs are not supplied.

Move the AUI port slide latch to the locked position (outward) using a
small screwdriver, if necessary.

See the AUI Port Cabling section for recommended AUI cables and additional
information.
2

Connect the setup and OBM ports as required.

Connect the setup port (MJ–8 EIA-232 standard EIA-TIA-574) to a
setup port device. See the Setup Port Cabling and Pin Assignments
section for additional information.

Connect the 9-pin OBM port (EIA-232 standard EIA-TIA-574 ) to the
9-pin interface connector. The OBM port LED lights to indicate that the
port is in use. See the OBM Port Cabling and Pin Assignments section
for additional information.

Connect the DEChub 900 module cables.

Refer to the DEChub 900 module Installation manual to connect the required
cables needed for proper operation of the module.
4

Connect the power cord to the power connector and then to a wall outlet.

Connecting the power initiates a self-test in the DEChub 900 module. Refer to
the DEChub 900 module Installation manual to configure the module and verify its
operation.

DEChub ONE

AUI Port Cabling
The AUI port can be connected to a MAU (available separately from Digital), or to
an AUI cable (not provided) that connects to a MAU located on the LAN.

Connecting a MAU to the AUI Port
1) Insert a MAU transceiver into the AUI
connector, as illustrated, and slide the latch
mechanism to lock the MAU in place.

Place AUI cable or
MAU into the AUI
connector and move
the slide latch to the
locked position.

Note:
Some non-Digital MAUs may not fit into
the DEChub ONE’s AUI connector.
2) Connect the cabling (twisted-pair, ThinWire, or
fiber-optic) from the MAU to the LAN. See the
Front Panel and Packaging section to order a
Digital MAU. The MAU documentation
provides additional information.

Connecting Directly to the AUI Port
1) You can connect a cable from the AUI port
directly to a MAU on the LAN or backbone.

LKG–8414-93I

2) Connect the AUI cable to the AUI connector
and move the slide latch to lock the connection
securely. Connect the other end of the AUI
cable to a MAU located on the LAN.
The cables Digital recommends for use with the AUI port are listed in the
following table:
Cable

Description

BNE3H–xx 1

PVC-insulated with straight connector

BNE3K–xx

PVC-insulated with right-angle connector

1 The xx represents the length in meters.

DEChub ONE

Setup Port Cabling and Pin Assignments
The setup port provides access to the setup port menu for the attached network
module. This menu and the setup parameters are described in the
documentation for the attached network module. Not all network modules
support the setup port. Refer to the DEChub 900 MultiSwitch Owner’s Manual
and the installation and configuration manual for the attached module for
additional information.
You can connect a setup port device (terminal device, personal computer, or
terminal server) to the setup port connector on the single-slot hub using various
cables and adapters. This allows you to use the setup port to configure the
attached network module’s parameters. The default speed for the setup port is
9600 baud.

Setup Port (Shielded MJ-8) Pin Assignments
The signals for the DEChub ONE setup port connector are listed in the following
table:
Pin
Signal Name
1, 4, 5 No connection
2
Receive (RX)
3

Ground

Transmit (TX)

Always high (+5 V)

Always low

Setup Port Cables
The setup port cable and adapters are listed in the following table:
Cable/Adapter Type
BN24H–xx 1
BN24H–xx/H8871-J
BN24H–xx/H8575-J

Connecting Device
Terminal with 6-pin MMJ connector
Terminal with 9-pin D-sub connector
Terminal with 25-pin D-sub connector

1 The xx represents the length in meters.

DEChub ONE

OBM Port Cabling and Pin Assignments
When you connect the DEChub ONE out-of-band management (OBM) port to a
data terminal equipment (DTE) device, the attached network module becomes
manageable using the Simple Network Management Protocol (SNMP) over the
Serial Line Interface Protocol (SLIP). Not all network modules support the OBM
port. Refer to the DEChub 900 MultiSwitch Owner’s Manual and the installation
and configuration manual for the attached module for additional information.
The signals on the OBM port conform to standard EIA-574, which is based on
EIA-232D but uses a 9-pin (DB9) connector instead of a 25-pin connector.
EIA-574 is the signaling standard used by the serial ports on most personal
computers. The OBM port appears as a DTE device and can be connected to a
modem by using a standard AT modem cable.

OBM Port (DB9) Pin Assignments
The signals for the OBM port DB9 connector are listed in the following table:
Pin
1
2
3
4
5
6
7
8
9

Signal Name
Data carrier detect (DCD)
Receive data (RXD)
Transmit data (TXD)
Data terminal ready (DTR)
Ground
Data set ready (DSR)
Request to send (RTS)
Clear to send (CTS)
No connection

OBM Port Cables
The OBM port cables and adapters are listed in the following table:
Cable/Adapter Type
BN24H–xx 1 /H8571-J1
BC29Q–10
BC29P–10

Connecting Device
DECserver 900TM with 8-pin MJ connector
PC with 9-pin D-sub connector
Modem with 25-pin D-sub communications port

1 The xx represents the length in meters.

DEChub ONE

Problem Solving Using LEDs
Table 1 provides information to help isolate problems to the DEChub ONE or the
attached DEChub 900 module.
Table 1:
Symptom

Problem Solving Using LEDs
Probable
Corrective Action
Cause

Power LED on
the attached
network module
is off.

The single-slot
hub has no dc
power input.

Ensure that the ac power cord is properly connected
to the DEChub ONE and wall outlet.
Check the wall outlet power.
Ensure that the hot-swap switch is properly
engaged and reseat the connectors.

Insufficient dc
power

Verify that the DEChub ONE is a 90-watt version
(Part number DEHUA–cx).

The DEChub ONE
fan runs
continuously.
The DEChub ONE
fan is not running.

Reseat the connectors.
If the fan still runs, replace the attached network
module.
Separate the network module from the DEChub
ONE.
If the fan still does not run, replace the DEChub
ONE.
If the fan begins running, replace the network
module.
Separate the module from the DEChub ONE.
If the fan continues to run intermittently, replace the
DEChub ONE.
If the fan begins to run continuously, troubleshoot or
replace the network module using its
problem-solving recommendations.

Power LED is
flashing on the
attached network
module.

The DEChub ONE
fan runs
intermittently.

The MAU Power
OK LED is off
and the Power
LED on the
attached network
module is on.
The OBM port
LED is off and
the Power LED
on the attached
network module
is on.

The MAU does
not have power.

Either the OBM
port is not in use
or the OBM LED
is faulty.

Ensure that the MAU is properly connected to the
AUI port and that the slide latch is secure.
Refer to the MAU documentation for proper cabling.
If the MAU is operating and properly connected,
replace the DEChub ONE.
Ensure that the network module supports OBM (has
modem capability) and that the OBM port is in use.
If the DEChub ONE is not the problem, troubleshoot
or replace the network module according to the
module’s problem-solving recommendations.

DEChub ONE

Product Specifications
Table 2 lists the DEChub ONE physical, environmental, and certification
specifications.
Table 2:
Parameter

Operating Specifications
DEChub ONE

With Attached Module

Height
Width
Depth
Weight
Connectors

44.45 cm (17.5 in)
4.45 cm (1.75 in)
10.16 cm (4.0 in)
1.59 kg (3.5 lb)
MJ–8, DB-9, 15-pin AUI

44.45 cm (17.5 in)
4.45 cm (1.75 in)
25.40 cm (10.0 in)
3.4 kg (7.5 lb)
MJ–8, DB-9, 15-pin AUI, plus
module connectors

Operating
Environment
Operating
Temperature

5° C to 50° C
(41° F to 122° F)

Physical

Relative Humidity 10% to 95% noncondensing

10% to 95% noncondensing

Altitude1

Sea level to 4900 m
(16,000 ft)

Input Power

100 Vac to 120 Vac @ 2 A
220 Vac to 240 Vac @ 1 A

Output Power

90 watts maximum
50W @+5Vdc,
1W @ +12.0Vdc
30W @ +15.0 Vdc

Certification

N/A
N/A
81 watts available to power
the module.
7 watts available to support
the AUI port.
Maximum power consumption
(DEChub ONE cooling fans,
module, and AUI ) 90 watts.

CE, CSA, FCC,TÜV, UL, VCCI CE, CSA, FCC,TÜV, UL, VCCI

1 For high-altitude sites, decrease the operating temperature specification by 1.8° C (35.2°F)

for each 1000 m (3200 ft).

DEChub ONE

Product Specifications
Table 3 lists the DEChub ONE acoustical specifications.
Table 3:

Acoustical Specifications

Acoustics:
Declared values per
ISO 9296 and ISO
77791
DEHUA

Idle/Operate
Sound
Sound PresPower Level sure Level
LWAd, B
LpAm, dBA
5.1
5.1

Idle/Operate
Sound
Sound PresPower Level sure Level
LWAd, B
LpAm, dBA
37
37

Schallemissionwerte:
Werteangaben nach
ISO 9296 und ISO
7779/DIN EN277792
DEHUA

Leerlauf/Betrieb
SchalleisSchalldrucktungspegal
pegal
LWAd, B
LpAm, dBA
5,1
5,1

Leerlauf/Betrieb
SchalleisSchalldrucktung-spegal
pegal
LWAd, B
LpAm, dBA
37
37

1 Current

values for specific configurations are available from Digital Equipment
Corporation representatives. 1 B = 10 dBa.
2 Aktuelle Werte für spezielle Ausrüstungsstufen sind über die Digital Equipment GmbH
Vertretungen erhältlich. 1 B = 10 dBa.

DEChub ONE

Associated Documents
DEChub 900 MultiSwitch Owner’s Manual
Open DECconnect Building Wiring Components and Application
DEChub 900 full-height network module installation manuals
MAU transceiver installation manuals:

EK-DECXM-IC for ThinWire connection to the LAN

EK-DEFLM-IC for fiber-optic connection to the LAN

EK-DETPM-IC for twisted-pair connection to the LAN

DEChub ONE

Accessing MIBs, RFCs, and Release Notes
This section provides information on accessing online MIBs, RFCs, and release
notes on the Internet. Public MIBs, Digital private (DEChub) MIBs, RFCs, and
release notes that support the attached module are available over the Internet
network by using any of the following methods:

Anonymous ftp

Electronic mail

ftpmail

Diskette (MIBs for some Digital products)

Using Anonymous ftp
Digital offers anonymous ftp access to online RFCs, up-to-date DEChub MIBs,
and product release notes, in ASCII text form, at GATEKEEPER.DEC.COM. You
will find these up-to-date documents stored in the directory /pub/DEC/hub900.
Check the README file for the current contents of the directory.
To use anonymous ftp to copy files, follow these instructions:
1. Use the Internet application ftp to connect to gatekeeper.dec.com
(the Internet address is 16.1.0.2).
2. Log in as user anonymous.
3. Use your electronic mail address as the password.
4. Use the cd command to get to the directory /pub/DEC/hub900.

DEChub ONE

Accessing MIBs, RFCs, and Release Notes (Cont.)
5. Use the ascii command to specify that you are retrieving ASCII text files.
6. Use the get command to retrieve the file or files that you require.
7. When you are finished, use the quit command to log out.
The following example shows how to copy the README file from the repository.
Note that user input is case sensitive; you must type it as shown. User input is
shown in bold.
% ftp gatekeeper.dec.com
Connected to gatekeeper.dec.com
220 GATEKEEPER.DEC.COM FTP Service Process
Name: anonymous
331 ANONYMOUS user ok, send real ident as password.
Password: milano@netman.stateu.edu
230 User ANONYMOUS logged in at Tue 10–Aug–1993 10:24–EST, job
54.
ftp> cd /pub/DEC/hub900
331 Default name accepted. Send password to connect to it.
ftp> ascii
220 Type A ok.
ftp> get README
200 Port 19.54 at host nnn.nn.nn.nn accepted.
150 ASCII retrieve of /pub/DEC/hub900/README started.
226 Transfer completed. 40239 (8) bytes transferred.
40239 bytes received in 23.65 seconds (5.8 Kbytes/s)
ftp> quit

DEChub ONE

Accessing MIBs, RFCs, and Release Notes (Cont.)
Using Electronic Mail
The DDN Network Information Center (NIC) of SRI International provides
automated access to NIC documents and information through electronic mail.
This is especially useful for people who do not have access to the NIC from a
direct Internet link, such as BITNET, CSNET, or UUCP sites.
To use the mail service, follow these instructions:
1. Send a mail message to SERVICE@NIC.DDN.MIL.
2. In the SUBJECT field, request the type of service that you want, followed by
any needed arguments.
Normally the message body is ignored, but if the SUBJECT field is empty, the
first line of the message body is taken as the request. The example at the
end of this section lists some of the services available.
Requests are processed automatically once a day. Large files are broken down
into separate messages. However, a few files are too large to be mailed.
The following are example SUBJECT lines to obtain DDN NIC documents:

HELP
RFC 822
FYI 1
RFC 1119.PS
NETINFO DOMAIN–TEMPLATE.TXT
SEND RFC: RFC–BY–AUTHOR.TXT
SEND IETF/1WG–SUMMARY.TXT
SEND INTERNET–DRAFTS/DRAFT–IETF–NETDATA–NETDATA–00.TXT
HOST DIIS

DEChub ONE

Accessing MIBs, RFCs, and Release Notes (Cont.)
Using ftpmail
Digital offers Internet ftpmail access to private MIB information, in ASCII text
form, at GATEKEEPER.DEC.COM, with up-to-date documents stored in the
directory /pub/DEC/hub900/mibs. Check the INDEX file and the README file
for the current contents.
To use ftpmail, follow these instructions:
1. Send a mail message to ftpmail@gatekeeper.dec.com.
2. Ignore the subject line.
3. Include the word “connect” in the first line of the body.
4. Include get commands for each document required, for example:
5. get/pub/DEC/hub900/mibs/README
Requests are acknowledged, then queued and processed every 30 minutes.
Because of the number of requests, it may take a day or two before you receive a
reply.

Obtaining a Diskette
You can obtain a free diskette containing the latest DEChub Digital private MIBs
and RFCs. To request a diskette, call 800–DIGITAL, press 2, and ask for
presales technical support. Request the RFCs and MIBs for the appropriate
DEChub module.

DEChub ONE

HOW TO ORDER ADDITIONAL DOCUMENTATION
DIRECT TELEPHONE ORDERS
In Continental USA
call 1-800-DIGITAL
(1-800–344-4825)

In Canada
call 800–267–6215

In New Hampshire,
Alaska or Hawaii
call 603–884–6660

ELECTRONIC ORDERS (U.S. ONLY)
Dial 800-dec-demo with any VT100
or VT200 compatible terminal and a
If you need
assistance,
call 1-800-DIGITAL (1-800-344-4825)
1200
baud modem.

DIRECT MAIL ORDERS (U.S. and Puerto Rico*)
DIGITAL EQUIPMENT CORPORATION
P.O. Box CS2008
Nashua, New Hampshire 03061

DIRECT MAIL ORDERS (Canada)
DIGITAL EQUIPMENT OF CANADA LTD.
940 Belfast Road
Ottawa, Ontario, Canada K1G 4C2
Attn: A&SG Business Manager

INTERNATIONAL
DIGITAL EQUIPMENT CORPORATION
A&SG Business Manager
c/o Digital’s local subsidiary
or approved distributor

Internal orders should be placed through Publishing and Circulation Services (P&CS),
Digital Equipment Corporation, 444 Whitney Street, NRO2, Northboro, Massachusetts 01532-2597
*Any prepaid order from Puerto Rico must be placed
with the Local Digital Subsidiary:
809–754–7575

DEChub ONE Installation
EK-DEHU2-IN. A01
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