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EK-DEMON-IN-A01

May 1993

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Document:	Digital Ethernet Multiport Office Network Repeater Installation
Order Number:	EK-DEMON-IN
Revision:	A01
Pages:	9
Original Filename:

OCR Text

Digital Ethernet Multiport
Office Network Repeater
Installation Information
Order Number: EK-DEMON-IN. A01

Digital Equipment Corporation
Maynard, Massachusetts

FCC NOTICE: This device complies with Part 15 of the FCC Rules. Operation is
subject to the following conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that
may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference in a
residential installation.
Any changes or modifications made to this equipment may void the user’s authority
to operate this equipment.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
–

Re-orient or relocate the receiving antenna

–

Increase the separation between the equipment and receiver

–

Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected

–

Consult the dealer or an experienced radio/TV technician for help

BENUTZERHINWEIS: Das Digital Ethernet Multiport Office Network Repeater in
Verbindung mit IBM Personalcomputersystemem entsprechen den Funkentstöranforderungen
der DBP-Verfugung 523/69 und VDE0871 Grenzwertklasse B.

This document was prepared using VAX DOCUMENT, Version 2.1.

January 1993
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.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject
to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data
and Computer Software clause at DFARS 252.227-7013.
© Digital Equipment Corporation 1993.
All Rights Reserved.
Printed in Taiwan.
The following are trademarks of Digital Equipment Corporation: DEC and the
DIGITAL logo
Velcro is a registered trademark of Velcro USA, Inc.

This document was prepared using VAX DOCUMENT, Version 2.1.

1
Overview
1.1 Description
The Digital Ethernet Multiport Office Network Repeater has five
shielded or unshielded twisted-pair ports for network expansion.
The repeater can amplify, retime, and retransmit signals from one
port to another, allowing a maximum cable distance of 100 meters per
port.
This installation guide shows you how to mount the repeater to a wall
and connect it to the network. Before you begin, select a location to
mount the repeater that best suits your needs.

1.2 Contents
Your repeater is supplied with a power cord, power supply, and two
adhesive-backed Velcro pads for mounting.

1.3 Installation
1. Mount the repeater vertically (preferred) using the Velcro pads
that are packaged with your unit. (NOTE: You can mount the
repeater with screws [not included] using the two key holes to
slide over the head of the screws.) See Figure 1–1.
2. Connect the power cord from the wall receptacle to the power
connector on the power supply.
3. Connect the power supply cable to the power connector on the
repeater. (NOTE: When connected to the power source, the green
LED near the power connector on the rear of the unit comes on.)
1–1

4. Connect the primary I/O twisted-pair cable from the main HUB to
the primary I/O port connector.
5. Connect the remaining RJ45 ports to any devices using 10Base-T
compatible twisted-pair cables. (NOTE: The ports can be used in
any order.)

1.4 LED Activity
The DECminiNET repeater has seven green LEDs (Figure 1–1).
•

Ports 1 through 5 - These turn on when power is turned on. They
remain on until there is network activity. Then, only the ports
with network connection remain on.

•

Activity - This LED (labeled with a #) turns on when there is
network activity. When there is no activity, the LED is off.

•

Power - This turns on when power is supplied to the repeater.

1.5 Specifications
Enclosure dimensions:

18.75 x 6.0 x 3.5 cm
(7-3/8 x 2-3/8 x 1-3/8 in)

Power consumption:

3.5 W

Power supply:

H7810-AA

Operating environment:

Temperature (at sea level): 15°C - 32°C (59°F 90°F)
Relative humidity: 8% - 80% (non-condensing)

Radiated emissions:

FCC Class A
VDE Class B

IEEE Compliance:

ANSI/IEEE 802.3 CSMA/CD (Ethernet)
Local Area Networks Specification. (See
802.3 Repeater Rules section, Configuration
Guidelines.)

1–2

1.6 Optional Equipment
Based on your wiring requirements you may need one or more of the
following cables. (Note: xx indicates a variable for optional cable
lengths that can be ordered.)
•

BN26K-xx - Unshielded straight through

•

BN26L-xx - Shielded straight through

•

BN24F-xx - Unshielded cross-over (x)

•

BN26N-xx - Shielded cross-over (x)

1.7 RJ45 Connector Pinning
Pin
Number

Port 1
Straight-through

Ports 2-5
Twisted-Pair
Crossover (x)

Transmit + (TD+)

Receive + (RD+)

Transmit - (TD-)

Receive - (RD-)

Receive + (RD+)

Transmit + (TD+)

N/C

Receive - (RD-)

Transmit - (TD-)

N/C

1 No connection.

1–3

Figure 1–1 Digital Ethernet Multiport Office Network Repeater

I/O Ports
(Front View)

+5V
700mA

Power
Connector
Power
LED

Activity
LED

Velcro Mounting
Area or Optional
Screw Mounting
Keyholes

Power Input
(R e a r V i e w )

Mounting Holes
(Bottom View)

3
4

Port
LEDs

5
1
2x

Straightthrough
Connector

3x
4x

Cross-over
Connectors

LJ-02595-TI0

1–4

Figure 1–2 Digital Ethernet Multiport Office Network Repeater
Wiring Configuration
Power Supply
(H7810)

Network
Faceplate

1 2 3 4 5

Straight-through
Cable
(BN26K-xx)

Power Cord

1
2x

Wall
Receptacle

3x
4x
5

Straightthrough
Cable
(BN26K-xx)

1 2 3 4 5
1

Straight-through
Cable
(BN26K-xx)

2x
3x
4
5

Straight-through Cable
(BN26K-xx)

LJ-02659-TI0.DG

1–5