Planet DHR-800 User manual

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NOVA100 Series
DHR-800
DHR-800P
19" Modular/ Expandable
Dual-Speed Stackable Hub

NOVA100 Series
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Trademarks
Copyright PLANET Technology Corp. 1998.
Contents subject to revision without prior notice.
PLANET is a registered trademark of PLANET Technology Corp. The
information in this manual is subject to change without notice. All
other trademarks belong to their respective owners.
FCC Warning
This equipment generates and uses radio frequency energy. If it
is not installed and used properly in strict accordance with the
manufacturer‘s instructions, it may cause interference to radio
and television reception. It has been type-tested and found to
comply the specifications in sub-part J of Part 15 of FCC Rules,
which are designed to provide reasonable protection against
such interference in a residential installation. There is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause 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 the receiving antenna
•Relocate the computing device with respect to the receiver
•Move the computer away from the deceiver
•Plug the computer into a different outlet so that computer
and receiver are on different electrical circuits.
If necessary the user should consult the dealer or an experienced
radio or television technician for additional suggestions.
Revision
The information in this manual is subject to change without
notice.
User's manual for PLANET Nova 100 Series,
For models: DHR-800/DHR-800P.
Rev 1.20 (Jul. 1998)
Part NO. EMHDHR800v2

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Table of Contents
1. INTRODUCTION....................................................................1
ABOUT THIS GUIDE.....................................................................1
CHECKLIST.................................................................................1
PRODUCT FEATURES ...................................................................2
ABOUT FAST ETHERNET..............................................................2
2. INSTALLATION......................................................................5
HARDWARE DESCRIPTION............................................................5
•LED Indication...................................................................6
•Rear Panel .........................................................................7
HARDWARE INSTALLATION..........................................................8
•General Rules.....................................................................8
•Connecting End Nodes .......................................................9
•Stacking two Hubs............................................................11
•Connecting the Hub to Another Hub by Uplink port .........11
•Installing the modules into the Hub ..................................11
•Connecting the Hub to AC Power.....................................12
HARDWARE TROUBLESHOOTING................................................12
APPENDIX A SPECIFICATIONS............................................15
APPENDIX B RJ-45 PIN ASSIGNMENTS...............................16
STRAIGHT-THROUGH /CROSSOVER CABLE.........................16

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1
DHR-800/DHR-800P User’s Manual
1.
Introduction
About This Guide
Thank you for purchasing PLANET NOVA100 10/100Mbps Dual
Speed Ethernet Hub –DHR-800/DHR-800P. Compact in size and
lightweight, utilizing the latest VLSI technology to provide high
reliability levels, the units provide a flexible approach to hub
deployment.
In this user's guide, you will learn product characteristics, it's
features, and also some basic installation concepts. Please read the
following section carefully before your installation.
Checklist
Carefully unpack the package and check its contents against the checklist
given below.
•10/100BASE-TX Dual-Speed Ethernet hub:
Primary Model –DHR-800P
Secondary Model –DHR-800
•User‘s manual
•Power Cord
•Accessories
Please inform your dealer immediately for any wrong, missing, or damaged
part if possible, retain the carton including the original packing materials,
and use them against to repack the product in case there is a need to return
it to us for repair.

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Product Features
1. DHR-800P/DHR-800 is a 8-port modularized 19" Rack mount
10/100Mbps Dual Speed Ethernet Stackable Hub, complies with the
IEEE802.3 10Base-T and IEEE802.3u 100Base-TX Class II
standard.
2. DHR-800P and DHR-800 are the same product series and can stack
with each other.
•DHR-800P is the 8-port Dual-Speed Ethernet Hub with internal
switching module –called “Primary Hub”
•DHR-800 is the 8-port Dual-Speed Ethernet Hub without
switching module –called “Secondary Hub”
3. At rear panel, provide two stacking ports for stacking up to 3 units
max. This type of connection has no sacrifice ports.
4. DHR-800P provides switching function to bridge between the
10Base-T segment and 100Base-TX segment.
5. DHR-800 provide two speed auto-negotiation, but 10Base-T and
100Base-TX segments can not communicate with each other, except
by stacking with DHR-800P primary model.
6. At the front panel, one additional RJ-45 Uplink port can be
cascaded to a hub by using straight-through cable.
7. Two Expansion Slots for multiple purpose networking, network
expansion and extension
8. LED indicators array for simple diagnostics and management
About Fast Ethernet
This hub is technically known as a 100Base-TX Class II Fast
Ethernet hub. This Section describes what this means in practical
terms.
• Ethernet Standards and Operation Speeds

DHR-800/DHR-800P User's 3
The standards of the Ethernet are defined by the Institute of
Electrical and Electronics Engineers (IEEE). The standard for
traditional Ethernet using hubs and twisted-pair cables is known as
10Base-T. Traditional Ethernet works at a signaling speed of
10Mbps, that is, ten megabits (slightly more than a character) per
second. The Base in 10Base-T stands for “baseband,”a one-bit-at-
a-time signaling method; the T stands for twisted-pair cables.
Fast Ethernet was developed to meet the demand for increased
“bandwidth,”in other word, greater data-carrying capacity. A fast
Ethernet hub works at 100Mbps, ten times the speed of a 10Base-T
hub.
The IEEE had defined several Fast Ethernet Standards. The hub complies
with the 100Base-TX standard: 100Mbps baseband signaling on twisted-
pair cables, with signals crossing from the Transmit lines to the Receive
lines somewhere between each pair of communication end nodes.
• Fast Ethernet Hub Classes
This hub is a Class II Fast Ethernet hub. This means two things:
1.It will work with Fast Ethernet interface cards of one type only, and
2.It can be connected to another hub for the purpose of expanding the
network.
Note: A Class I hub will work with more than one type of Fast Ethernet
interface card, but cannot be connected to another hub.
• 100Base-TX Fast Ethernet Cabling
The twisted-pair cables used for traditional Ethernet and Fast Ethernet all
look the same on the outside. Such cables, however, come in different
grades and with different wire arrangement, and can have different kinds
of sheathing.

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The kinds of cables that can be used with a 100Base-TX Class II Fast
Ethernet hub are
♦Category 5 unshielded twisted-pair cable, and ( Category 5 UTP)
♦Type 1 shielded twisted-pair cable (Type 1 STP )
• 100Base-TX Fast Ethernet Summary
Be sure to remember the following rules about a 100Base-TX Class II Fast
Ethernet hub:
1. All end nodes connected to the hub must have 100Base-TX Fast
Ethernet interface cards.
2. Only Category 5 UTP or Type 1 STP cables may be used to connect and
nodes to the hub. The cables must be straight-wired.
3. To expand a network built around one Fast Ethernet hub, you can
connect the hub to one and only one other 100Base-TX Class II hub.

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DHR-800/DHR-800P User’s Manual
2. Installation
Hardware Description
This product series provide two different running speed –10Mbps and
100Mbps in the same hub and automatically distinguish the speed of
incoming connection and group the same speed ports in a network segment,
i.e., each port has auto-negotiation Nway function.
Both DHR-800P and DHR-800 products have dual-speed Nway function,
but only DHR-800P with switching function to bridge 10Mbps and
100Mbps segments.
The DHR-800 series product can stack up each other, but in a stack only
ONE DHR-800P primary hub is allowed. It means that in a stack you can
have several DHR-800 hubs then all ports with dual-speed auto sensing
function, but 10Base and 100Base segments can not link together. Now by
adding one DHR-800P hub to this stack, 10 and 100 segments can
communicate through inside switch module.
This section describes the important parts of the 10/100BASE-TX Dual-
Speed Ethernet hub. It presents front panel and rear panel drawings of the
product showing the LED indicators, connectors, and switches.
• Front panel
The following figure shows the front panel of 8-port 10/100BASE-TX
Dual-Speed Ethernet hub.
Fig 2.1 DHR-800P front panel
Note: The difference between DHR-800 and DHR-800P is on the plastic

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label on front panel. The model number and character “Primary”is
for DHR-800P.
There are 8 RJ-45 jacks on the front panel. Each jack is labeled with a port
number.
All ports‘Transmit and Receive lines are crossed within the hub (ie. 1-8
ports are MDI-X ports). A 10/100BASE-TX port must be internally cross-
wired to let you connect an end node using straight-wired cabling.
A special RJ-45 connector is converted from the 1st port as “Uplink”port
(MDI-II port). The “Uplink”port is used for connecting another hub
through an ordinary straight-wired twisted-pair cable by running one end
of straight cable to “Uplink”port and the other end to another hub‘s
normal port.
One expansion slots for optional module installation.
• LED Indication
On the front panel, there are several LED indicators for monitoring the
device itself, and the network status. At a quick glance of the front panel,
the user would be able to tell if the product is receiving power; if it is
monitoring another hub or concentrator; or if a problem exists on the
network.
The following table describes the function of each LED indicator
.