Planet DH-1600 User manual

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NOVA100 series
DH-1600
DH-2400
10/100Mbps Auto-Sense
Dual Speed Hub

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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 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 when the equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the
Instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in
a residential area is likely to cause harmful
interference in which case the user will be required to
correct the interference at his own expense.
Remark
This user's manual is for PLANET NOVA100 series
Dual Speed hub model --
DH-1600
DH-2400
Rev: 1.03 (April, 1998)
Part No: EMDH16/24V3

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Table of Contents
1. INTRODUCTION....................................................................5
ABOUT THIS GUIDE.....................................................................5
CHECK LIST................................................................................5
PRODUCT FEATURES ...................................................................6
2. GENERAL DESCRIPTION.....................................................7
ABOUT DH-1600/ DH-2400........................................................7
FRONT PANEL OF DH-1600/ DH-2400.........................................7
LED Indications....................................................................8
REAR PANEL...............................................................................9
3. INSTALLATION....................................................................11
HARDWARE INSTALLATION........................................................11
GENERAL RULES.......................................................................11
CONNECTING END NODES.........................................................12
HUB TO HUB CONNECTION, THROUGH UPLINK PORT ...................13
CONNECTING THE FIBER-OPTIC MODULE....................................14
CONNECTING THE HUB TO AC POWER.......................................14
4. TROUBLESHOOTING.........................................................17
APPENDIX.................................................................................19
PRODUCT SPECIFICATION ..........................................................19

DH-1600/DH-2400 User’s Manual 5
1. Introduction
About this Guide
Thank you for purchasing this Auto-sense 10/100Mbps
Ethernet Hub -- DH-1600/DH-2400. PLANET's DH-
1600/DH-2400 provides auto-detecting link speeds at 10Mbps
or 100Mbps, per port. Compact in size and light-weight,
utilising 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 installation.
Check List
Carefully unpack the package and check its contents against the
checklist given below.
•NOVA 100 10/100Mbps 16/24-port Dual Speed hub
•User’s manual
•Power Cord
•Accessories
Please inform your dealer immediately for any wrong, missing,
or damaged part and where possible retain the carton including
the original packing materials, and use them to repack the
product in case there is a need to return it to us for repair.

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Product Features
♦Compliant with IEEE 802.3u 100Base-TX Class II,
IEEE802.3, 10Base-T standard
♦16/24-port 10/100Mbps Auto-selection
♦One UpLink port for easy hub cascade through UTP
straight cable
♦One slot supports one or two optional Fibre Optical port
for long-distance connectivity
♦Front panel LED indicators for 'at a glance' network
status/diagnostics
♦Fully compatible with all major Network Operating
Systems and Ethernet frame types
♦19" industrial standard, rack-mountable or wall-mountable

DH-1600/DH-2400 User’s Manual 7
2. General Description
About DH-1600/ DH-2400
This section describes the important parts of the NOVA 100
16/24-port Dual Speed hub. It presents front and rear panel
drawings of the product showing the LEDs and connectors.
DH-1600: 16-port 10/100Mbps Dual Speed Hub
DH-2400: 24-port 10/100Mbps Dual Speed Hub
Front Panel of DH-1600/ DH-2400
The following figure shows the front panel of DH-1600/DH-
2400 10/100Base-TX Fast Ethernet hub.
Figure 1. Front Panel of DH-1600
Figure 2. Front Panel of DH-2400
There are 16/24 - RJ-45 ports and one “Uplink”port on the
front panel. Each port is labeled with a port number.
One special port labeled with “Uplink”is converted from

PLANET NOVA100 Series
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port#16/24. You can either use Port#16/24 or the “Uplink”port.
The “Uplink”port is used for connecting another hub through
an ordinary straight-wired twisted-pair cable by running one end
of a straight cable to the “Uplink”port and the other end to
another hub’s standard 'station' port i.e 1-16 or 1-24
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 will 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.
LED Indications
The following describes the function of each LED indicator.
LEDs Status Descriptions
PWR
(Power LED) Steady Green This LED light is located at the left side on the front panel. It will light up (ON) to
show that the product is receiving power.
Conversely, no light (OFF) means the
product is not receiving power.
10 COL
(Collision
LED)
100 COL
Blink
Red A “collision”in Ethernet, is when two end nodes transmit at the same time. The
indicator lights up whenever there is a
collision between a directly attached end
node and any other node. 10COL for
10Mbps segment, 100COL for 100Mbps
Segment

DH-1600/DH-2400 User’s Manual 9
LEDs Status Descriptions
LNK/Act
(Link/ Activity
LED)
Steady
Green
/
Blinking
Green
Each RJ45 station port on the hub is
assigned an LED light for monitoring port
"Good Link and Activity". Each LED is
normally OFF after the power on
operation, but will light up steadily to
show “Good Link”.
And flash to show that the receiving
signals are passing into the hub.
100Mbps Steady
Orange Lit indicates 100Mbps device connected Off indicates 10Mbps device connected
Table 1. Status of LED Indicators
Rear Panel
On the rear panel there is a power AC power connector , power
switch, reset button and one expansion slot. The following
describes the function of each connector and switch.
Figure 3 Rear panel of DH-1600 / DH-2400

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AC Power Slot
The power cord should be plug into this socket. The AC Adapter
accepts AC power range 90VAC~260VAC.
Power Switch
Power On/OFF switch, make sure you plug in the power cord
tightly before powering on the hub. Power off the hub before
unplugging the power cord
Reset Button
The reset button can be used to force the DH-1600/DH-2400 to
re-configure it's connectivity mode(s).
Expansion Slot
For long distance connections, the DH-1600/DH-2400 can
utilize an optional slide-in fibre-optic module after removal of
the rear module cover.

DH-1600/DH-2400 User’s Manual 11
3. Installation
Hardware Installation
After selecting an appropriate 1ocation, you are ready to
connect the unit to the network. This section covers important
rules regarding Fast Ethernet connections, and describes how to
connect the hub to end nodes, another hub, and AC power.
General Rules
Before making any connections to the hub, note the following
rules:
•All network connections to the hub must be made using
Category 5 UTP or Type 1 STP cables for 100Base-TX,
Category 3~5 cables for 10Base-T. Do not use similar-
looking Category 2 or 3 cables or "flat satin" telephone cords
for 100Base-TX connection.
•No more than 100-metre (about 328 feet) of cabling may be
used between the hub and an end node; no more than 5
metres (16.4 feet) may be used between two Fast Ethernet
Hubs. Under this limitation, no more than 205 meters of
cabling may be used between any two-end nodes.
•To expand your network, proceed as below:
♦First -- you can connect the hub to another 100Base-TX
Class II Fast Ethernet hub, and no more than one. To a
10Base-T Ethernet Hub with no more than 100 metres
UTP, up to 3 10Base hubs can be cascaded. The connected
hubs can be from different suppliers.

PLANET NOVA100 Series
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♦Second -- you can connect the hub to another hub through
its expansion slot. The modules support a single or two
ports of 100Base-FX fibre-optic ST/SC interface and
shared with the last two port of DH-1600 and port#12,
port#24 of DH-2400. The installation is as section
"Connecting the Fiber-optic module (optional)".
Connecting End Nodes
LAN end nodes such as single-user computers, servers, bridges,
and routers must be connected to the 10/100Base-TX ports
using straight-wired high-grade (Category 5 unshielded or Type
1 shielded) twisted-pair cabling. (Category 3, Category 4 can
not be used for 100Base-TX)
♦We recommend starting with the lower-numbered ports when
connecting to the Ethernet LAN. Connection to another hub
which does not have an “Uplink”port or a slide-switch, you
will have to use the “Uplink”port on the hub for the
connection.
♦We also recommend making sure any end nodes are turned
off before plugging the cable in for the first time. If the plug
does not fit well and the node's LAN board is loose, forcible
insertion can momentarily break an internal contact and
damage the end node.
Following are step-by-step instructions for connecting an end
node to the hub using straight-wired twisted-pair cable.
1. Select a port on the hub
2. Plug one end of the cable into the node's RJ-45 port.
3. Plug the cable's other end into the selected RJ-45 port on the

DH-1600/DH-2400 User’s Manual 13
hub.
To test an end-node connection, connect the hub to power, then
turn the hub and the end node on. The link indicator for the port
should shine steadily and the 100Mbps LED should lit as well if
a 100Base-TX device is connected. If it does not, check the cable
and all connections.
Hub to Hub connection, through Uplink port
You can connect the hub to another 100Base-TX Class II Fast
Ethernet hub using a twisted-pair cable. Never connect the hub
to any other kind of hub, or to more than one 100Base-TX Class
II hub.
Make the connection as follows:
1. Make sure the “Uplink”port on the hub is free. That is,
port#16 or port#24 and the fiber-optic module are not
present.
2. Plug one end of the cable into “Uplink”port on the hub.
3. Plug the cable's other end into the available port (except
“Uplink”port) on the second hub.
5 meters(max.), Straight
UTP/STP cable
Figure 6. Hub to Hub cascade through UpLink port

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Connecting the Fiber-optic module (optional)
You can connect the hub to another 100Base-FX Switching hub
or to a PC through the fiber-optic module.
Make the connection as follows or refer to the installation guide
of the module to get more.
1. Make sure the port#15, port#16 of DH-1600 or port#12,
port#24 of DH-2400 on the hub is free.
2. Unplug the power. Remove the two screws of the expansion
slot of the hub.
3. For module without switching function, please make sure the
jumpers on the module are closed. If the jumper is opened, the
related fiber-optic port may not work.
4. Slide in the module with care, and secure the two screws.
5. Connect the fiber-optic connector (ST or SC type) tightly.
Please make sure the fiber connections are crossed. That is,
the TX port of the module to RX port of the connected PC or
switch, and RX to TX.
6. Power on the hub and the connected device, the 100Mbps
LED in the front panel of that ports should light and Link
LED light as well.
For fiber-optic wiring limitation, please refer to the module's
installation guide for detail. In general, the round-trip bit-time
latency between any two-end devices in the same collision
domain should be within 512 bit-time (IEEE802.3u, Fast
Ethernet)
Connecting the Hub to AC Power
After making network connections as described in the preceding

DH-1600/DH-2400 User’s Manual 15
sections, you are ready to plug the hub in and turn it on.
The input voltage is from 90 to 260 volts AC and any frequency
from 50 to 60 hertz. Adjustment to the power source is
automatic; there is no switch to set.
Before plugging the hub in, make sure the power cord
(1) is long enough to reach an AC wall outlet of an approved
type,
(2) has plugs that match both the hub's power inlet and the type
of wall outlet you will use, and
(3) Conforms to safety regulations in your area.
In most parts of the world you must use a three-conductor power
cord with an integral three-prong grounding plug.
If the supplied power cord does not meet all three requirements
given above, contact your computer equipment dealer and obtain
one that does. Do not use an extension cord or multi-socket
adapter; do not attempt to use a cord designed for any other kind
of power inlet or wall outlet; do not use a cord that fails to meet
safety standards in your part of the world.

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DH-1600/DH-2400 User’s Manual 17
4. Troubleshooting
Symptom: Link indicator remains off
Causes: Workstation’s network adapter, cable or hub port
is defective
Solution: The most common cause is a defective network
adapter or cable connection. Check the
corresponding cable connections, or the
workstation’s network adapter for possible
defects.
Verify that the correct cable type is being used.
(Note that crossover cable is only required if you
cascade hubs via RJ45 station ports, i.e. an uplink
port is not used.) Replace the defective cable or
adapter.
Some network adapter’s link indicator needs to be
initialized by a software driver. Therefore, if no
driver is pre-loaded , the hub’s link indicator will
remain off even after a connection is completed.
Symptom: 100Mbps indicator remains blinking after
connection
Causes: Workstation’s network adapter, or connected
device failed in N-Way auto-detection mode.
Solution: The most common cause may be the
incompatibility of the attached N-Way device.
Verify that the driver of the network interface
card is correct or loaded. If the driver of the card

PLANET NOVA100 Series
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or the switch supports manual mode selection, we
suggest you set the device to 100Mbps Half-
duplex or 10Mbps Half-duplex directly.

DH-1600/DH-2400 User’s Manual 19
Appendix
Product Specification
Model DH-1600 DH-2400
Ports 16 (10/100Mbps Auto-
sensing) 24 (10/100Mbps Auto- sensing)
LED Indicators Ports
System : 100Mbps, LINK/RX : PWR, 100 COL, 10 COL
1
Optional
100Base-FX
Module slot Single port (shared with port#15 or #12)
Two ports (shared with port#15,16 or #12,24)
Dimensions
(L,D,H) 430 mm x 180 mm x 44 mm (16.9”x 7.1”x 1.73”)
Placement 19" Rack Mount
ENVIRONMENTAL SPECIFICATIONS
Fuse
Protection 250V/2A
Input Voltage
Range 90 to 260 VAC
Input
Frequency 50 / 60 Hz ±3%
Power
Consumption 30 watts (max) 35 watts (max)
Temperature 0 - 55 degree C (Operating)
Humidity 10-85%, non-condensing (Operating)
Weight (N.W.) 2 kg 2.2 kg
STANDARDS COMPLIANCE
Electromagnetic
Compatibility FCC part 15 class A, CE-Mark
Network
Protocols IEEE 802.3 (Ethernet), 10Base-T IEEE 802.3u (Fast Ethernet), 100Base-TX,
100Base-FX Class II Repeater

EMDH16/24V3