D-Link DSH-16+ User manual

DSS-16+
16-port 10/100Mbps Switch
User’s Guide
Rev. 03 (MAR. 2001)
6012-9830016
Printed In Taiwan
RECYCLABLE

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TABLE OF CONTENTS
ABOUT THIS GUIDE..................................................... III
PURPOSE ........................................................................................III
TERMS/USAGE..............................................................................III
OVERVIEW OF THIS USER’S GUIDE .........................................III
INTRODUCTION .................................................................1
FAST ETHERNET TECHNOLOGY ................................................1
SWITCHING TECHNOLOGY .........................................................2
FEATURES.......................................................................................3
UNPACKING AND INSTALLATION................11
UNPACKING..................................................................................11
INSTALLATION.............................................................................11
IDENTIFYING EXTERNAL COMPONENTS
............................................................................................................11
FRONT PANEL..............................................................................12
REAR PANEL ................................................................................12
RIGHT SITE PANEL ...............ERROR! BOOKMARK NOT DEFINED.
LED INDICATORS.......................................................................13
QOS (QUALITY OF SERVICE) SETTING ... ERROR! BOOKMARK
NOT DEFINED.
CONNECTING THE SWITCH................................14
PC TO SWITCH ............................................................................14
HUB TO SWITCH..........................................................................14

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A. 10BASE-T Hub .....................................................................15
B. 100BASE-TX Hub.................................................................15
HUB WITHOUT UPLINK (MDI-II) PORT.................................15
A. Using straight cable.............................................................15
B. Using crossover cable .........................................................15
SWITCH TO SWITCH (OTHER DEVICES)..................................15
A. Using straight cable.............................................................16
B. Using crossover cable .........................................................16
PORT SPEED & DUPLEX MODE...............................................16
TECHNICAL SPECIFICATIONS .........................15
RJ-45 PIN SPECIFICATION.....................................17

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ABOUT THIS GUIDE
Congratulations on your purchase of DSS-16+. This device integrates
100Mbps Fast Ethernet and 10Mbps Ethernet network capabilities in a highly
flexible package.
Purpose
This guide discusses how to install your DSS-16+.
Terms/Usage
In this guide, the term “Switch” (first letter upper case) refers to your DSS-
16+, and ”switch” (first letter lower case) refers to other Ethernet switches.
Overview of this User’s Guide
Introduction. Describes DSS-16+ and its features.
Unpacking and Installation. Helps you get started with the basic installation
of DSS-16+.
Identifying External Components. Describes the front panel, rear panel and
LED indicators of DSS-16+.
Connecting the Switch. Tells how you can connect DSS-16+ to your
Ethernet network.
Technical Specifications. Lists the technical (general, physical and
environmental, and performance) specifications of DSS-16+.
RJ-45 Pin Specification. Describes the RJ-45 receptacle/connector and the
straight through and crossover cable connector.

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INTRODUCTION
This chapter describes the features of DSS-16+ and some background
information about Ethernet/Fast Ethernet switching technology.
Fast Ethernet Technology
The growing importance of LANs and the increasing complexity of desktop
computing applications are fueling the need for high performance networks.
A number of high-speed LAN technologies have been proposed to provide
greater bandwidth and improve client/server response times. Among them,
100BASE-TX (Fast Ethernet) provides a non-disruptive, smooth evolution
from the current 10BASE-T technology. The non-disruptive and smooth
evolution nature, and the dominating potential market base, virtually
guarantee cost effective and high performance Fast Ethernet solutions in the
years to come.
100Mbps Fast Ethernet is a new standard specified by the IEEE 802.3 LAN
committee. It is an extension of the 10Mbps Ethernet standard with the
ability to transmit and receive data at 100Mbps, while maintaining the
CSMA/CD Ethernet protocol. Since the Switch is compatible with all
10Mbps Ethernet environments, it provides a straightforward upgrade and
takes advantage of the existing investment in hardware, software, and
personnel training.

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Switching Technology
Another approach to pushing beyond the limits of Ethernet technology is the
development of switching technology. A switch bridges and transmits
Ethernet packets at the MAC address level of the Ethernet protocol, among
connected Ethernet or Fast Ethernet LAN segments.
Switching is a cost-effective way of increasing the total network capacity
available to users on a local area network. A switch increases capacity and
decreases network loading by dividing a local area network into different
segments. Each segment has its own bandwidth and it does not compete with
others for network transmission capacity.
A switch acts as a high-speed selective bridge between the individual
segments. The switch forwards traffic from origin segment to destination
segment, without interfering with any other segments. By doing this, the
total network capacity is multiplied, while still maintaining the same network
cabling and adapter cards.
For Fast Ethernet networks, a switch is an effective way of eliminating
problems of uplinking Fast Ethernet hubs beyond the “two-repeater limit”. A
switch can be used to split parts of the network into different collision
domains, making it possible to expand your Fast Ethernet network beyond
the 205-meter network diameter limit. The switch supports both traditional
10Mbps Ethernet and 100Mbps Fast Ethernet, which is also ideal for bridging
between the existing 10Mbps networks and the new 100Mbps networks.
LAN Switching technology is a marked improvement over the previous
generation of network bridges, which were criticized by their higher latencies.
Routers have also been used to segment local area networks. But, the router
expensive, difficult to setup, and maintenance intensive, these make it
relatively impractical for the network. Switch, on the other hand, is less
expensive, easier to setup, and practically maintenance free, which make it an
ideal solution to today’s local area network congestion problems.

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Features
This high performance DSS-16+ was designed for a network environment
where traffic and the number of users increase continuously.
DSS-16+, with their small, desktop size, was specifically design for small to
middle workgroups. It provides immediate access to a rapidly growing
network through a wide range of user-reliable functions.
DSS-16+ is ideal for shared bandwidth 10Mbps or 100Mbps workgroups
with multiple high-speed servers. With the highest bandwidth at 200Mbps
(Full-Duplex mode), each port can provide a workstation with congestion-
free data-pipe for simultaneous access to the server.
DSS-16+ is expandable by cascading two or more switches together. As all
ports support 200Mbps (Full-Duplex mode), the Switch can be cascaded
from any port and to any number of switches.
DSS-16+ is a perfect choice for 10Mbps network site that could be upgraded
to Fast Ethernet in the future. Ethernet workgroups can connect to the Switch
now, and change adapters and hubs anytime later without changing the
Switch or reconfiguring the network.
DSS-16+ combines dynamic memory allocation with store-and-forward
switching method to ensure that the buffer is effectively allocated for each
port. It also controls the data flow between transmit and receive nodes to
guarantee against all possible packet loss.
DSS-16+ is an unmanaged 10/100Mbps Fast Ethernet Switch that offers
solutions to increase Ethernet workgroup bandwidth. Other key features are
as followed:
 Uplink/MDI-II (media dependent interface) port for uplink to another
switch or hub.
 Store and forward switching scheme. As the result of complete frame
checking and error frame filtering, this scheme prevents error packages
from transmitting among segments.

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 NWay Auto-negotiation for any port. This allows auto-sensing of speed
(10/100Mbps) thereby providing you with automatic and flexible
solutions for your network.
 IEEE 802.3x flow control for full-duplex mode operation.
 Back pressure flow control for half-duplex mode operation.
 Data Forwarding Rate (per port) at wire-speed for both 10Mbps and
100Mbps speed.
 Data Filtering Rate (per port) at wire-speed for both 10Mbps and
100Mbps speed; eliminates all error packets, runts, etc.
 16K active MAC address entry table with self-learning and table ageing.
 512KBytes RAM buffer per device.
 Broadcast storm protection.

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UNPACKING AND INSTALLATION
This chapter provides unpacking and setup information for DSS-16+.
Unpacking
Open the shipping cartons and carefully unpacks its contents. The carton
should contain the following items:
 One 16-port 10/100M NWay Fast Ethernet Switch
 One external power adapter
 Four rubber feet to be used for shock cushioning
 User’s Guide
If any item is found missing or damaged, please contact your local reseller
for replacement.
Installation
The site where you install DSS-16+ may greatly affect its performance.
When installing, consider the following pointers:
 Install DSS-16+ in a fairly cool and dry place. See Technical
Specification for the acceptable operating temperature and humidity
ranges.
 Install DSS-16+ in a site free from strong electromagnetic source,
vibration, dust, and direct sunlight.
 Leave at least 10cm of space at the left and right hand side of DSS-16+
for ventilation.
 Visually inspect the DC power jack and make sure that it is fully secured
to the power adapter.
IDENTIFYING EXTERNAL COMPONENTS
This section identifies all the major external components of DSS-16+. Both
the front and rear panel is shown, followed by a description of each panel’s
feature. The LED indicator panel is described in detail in the next chapter.

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Front Panel
The figure below shows the front panels of DSS-16+.
16-port 10/100Mbps NWay Fast Ethernet Switch
LED Indicator Panel
Refer to the next chapter for detailed information about each LED indicator.
Rear Panel
Twisted-Pair Ports
Use any of these ports to connect network devices (workstations, hubs,
switches, etc.) to DSS-16+. These ports are MDI-X ports and you can use
ordinary straight-through twisted-pair cables to connect PCs, workstations,
and Servers to DSS-16+. If you need to connect these ports to devices with
MDI-X ports, you need to use crossover cables, or connect using the Uplink
port (described below).
Uplink Ports

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The Uplink port is a MDI-II port, which means you can connect this port to
another device’s MDI-X port using an ordinary straight-through twisted-pair
cable.
Port 1 and the Uplink port is really the same port, except that their pin-outs
are different. Do not use both Port 1 and the Uplink port at the same time.
DC Power Jack:
Power is supplied through an external AC power adapter. Check the
technical specification section for information about the AC power input
voltage.
Since DSS-16+ does not include a power switch, plugging its power
adapter into a power outlet will immediately power it on.
AC Power Connector:
For the power cord.
LED Indicators
Power (Power Indicator)
This indicator lights green when the hub is receiving power. This LED is off
indicating no power.
10/100M FDX and 10/100M COL (10/100Mbps Full-Duplex and
10/100Mbps Collision Indicator)
This LED indicator lights green when the respective port is in full-duplex
(FDX) mode. It remains off for half-duplex operation. This LED blinks green
when collision occurs on the respective port.
Note: the full-duplex LED lights green when the connected device supports
full-duplex operation.
10M Link/ACT and 100M Link/ACT (10Mbps Link/Activity (amber) and
100Mbps Link/Activity (green) Indicator)
This indicator lights green when the port is connected to a 100Mbps device.

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The DSS-16+ blinks green when transmitting or receiving data on the
100Mbps network.
This indicator lights amber when the port is connected to a 10Mbps device.
The DSS-16+ blinks amber when transmitting or receiving data on the
10Mbps network.
CONNECTING THE SWITCH
This chapter describes how to connect DSS-16+ to your Fast Ethernet
network.
PC to Switch
A PC can be connected to DSS-16+ via a two-pair Category 5 UTP/STP
straight cables. The PC (equipped with a RJ-45 10/100Mbps) should be
connected to any of the 16 ports (1x - 16x)
Note: Use CAT5 (or better) cable for 100Mbps connection.
After the connection is made, the port LED on DSS-16+ will show the status
of the connection. If LED indicator does not light after making a proper
connection, check the PC LAN card, DSS-16+, and DSS-16+ port.
The following are the possible LED indicator status for PC to Switch
connection:
1. The “LINK/ACT” LED indicator lights green for 100Mbps
connection or lights amber for 10Mbps connection.
2. The “FDX/COL LED” indicator lights green if the LAN adapter is
in full-duplex mode. The LED remains off when the adapter is in
half-duplex mode.
Hub to Switch
A hub (10 or 100BASE-TX) can be connected to DSS-16+ via a two-pair
Category 5 UTP/STP straight cables. Note: Use CAT5 (or better) cable for

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100Mbps connection. The connection is accomplished from the hub’s uplink
(MDI-II) port to any of DSS-16+’s 1~16 (MDI-X) ports.
A. 10BASE-T Hub
For a 10BASE-T hub, DSS-16+ LED indicators should light up as the
following:
“FDX/COL” LED indicator is OFF.
“LINK/ACT” LED indicator lights amber.
B. 100BASE-TX Hub
When connecting to a 100BASE-TX hub, DSS-16+ LED indicator should
light up as the following:
“FDX/COL” LED indicator is OFF.
“LINK/ACT” LED indicator lights green.
Hub without Uplink (MDI-II) port
If a hub is not equipped with an uplink (MDI-II) port, connection can be
made using either straight cable or crossover cable.
A. Using straight cable
When using straight cable, the connection can be made from Switch’s uplink
(MDI-II) port to any port of the Hub.
B. Using crossover cable
When using crossover cable, the connection can be made from any regular
ports of DSS-16+ to any port of the Hub.
Switch to Switch (other devices)
DSS-16+ can be connected to another switch or other devices (routers,

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bridges, etc.) via a two-pair Category 5 UTP/STP straight or crossover cable.
Note: Use CAT5 (or better) cable for 100Mbps connection.
A. Using straight cable
When using straight cable, this is done from DSS-16+’s uplink (MDI-II) port
(Switch A) to any of the 10Mbps or 100Mbps (MDI-X) port of the other
switch (switch B) or other device.
B. Using crossover cable
When using crossover cable, this is done from any (MDI-X) port of DSS-16+
(Switch A) to any of the 10Mbps, 100Mbps (MDI-X) port of the other
switch (switch B) or other device.
1. The “LINK/ACT” LED indicator lights green indicating 100Mbps
connection or it lights amber indicating 10Mbps speed.
2. The “FDX/COL LED” indicator lights green if the connection is in full-
duplex mode. The LED remains off when the connection is in half-
duplex mode.
Port Speed & Duplex Mode
After a connection is made between DSS-16+ and another Ethernet device,
the system uses auto-negotiation to determine the transmission mode for this
twisted-pair connection:
If the attached device does not support auto-negotiation or has auto-
negotiation disabled, an auto-sensing process is initiated to select the speed
and set the duplex mode to half-duplex.

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TECHNICAL SPECIFICATIONS
General
Standards
IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100 Base-TX Fast Ethernet
ANSI/IEEE 802.3 NWay auto-negotiation
IEEE 802.3x flow control
Protocol CSMA/CD
Data
Transfer
Rate
Ethernet: 10Mbps (half duplex), 20Mbps (full duplex)
Fast Ethernet: 100Mbps (half duplex), 200Mbps (full duplex)
Topology Star
Network
Cables
10BASET: 2-pair UTP Cat. 3,4,5; EIA/TIA- 568 100-ohm STP
100BASE-TX: 2-pair UTP Cat. 5; EIA/TIA-568 100-ohm STP
Number of
Ports 16 x 10/100Mbps NWay MDI-X ports
Uplink Port 1 x 10/100Mbps NWay MDI-II port, shared with port 1

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Physical and Environmental
DC inputs 3.3VDC/3A
Power
Consumption 10 watts. (Max.)
Temperature Operating: 0°~ 50°C, Storage: -10°~ 70°C
Humidity Operating: 10% ~ 90%, Storage: 5% ~ 90%
Dimensions 184 x 124 x 44 mm (W x H x D)
EMI: FCC Class A, CE Mark Class A, VCCI Class A
Performance
Transmits
Method: Store-and-forward
RAM Buffer: 512KBytes per device
Filtering
Address Table: 16K entries per device
Packet
Filtering/Forwar
ding Rate:
10Mbps Ethernet: 14,880/pps
100Mbps Fast Ethernet: 148,800/pps
MAC Address
Learning: Automatic update

RJ-45 PIN SPECIFICATION
When connecting your 16-port 10/100M NWay Ethernet Switch to
another switch or other Ethernet device, a modified crossover cable
maybe necessary. Please review your network products for matching
cable pin assignment.
The following diagram and tables show the standard RJ-45
receptacle/connector and their pin assignments for the switch-to-
network adapter card connection, and the straight / crossover cable for
the switch-to-switch / hub / bridge connection.
RJ-45 Connector pin assignment
Contact Media Direct Interface Signal
1 TX + (transmit)
2 TX - (transmit)
3 Rx + (receive)
4 Not used
5 Not used
6 Rx - (receive)
7 Not used
8 Not used
The standard cable, RJ-45 pin assignment

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The standard RJ-45 receptacle and connector
The following shows straight cable and crossover cable connections:
MDI-II (uplink) port to MDI-X port connection using Straight
Cable for connecting from Switch to switch or from Switch to
other network device.
MDI-X port to MDI-X port connection using Straight Cable for
connecting from Switch to switch or from Switch to other network
device.

FCC Certifications
This equipment has been tested and found to comply with the limits for a Class B 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. 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:
• Reorient 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.
Shielded interface cables must be used in order to comply with emission limits.
You are cautioned that changes or modifications not expressly approved by the party
responsible for compliance could void your authority to operate the equipment.
This device complies with Part 15 of the FCC rules. Operation is subject to the
following two 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.
CE Mark Warning
This is a Class B product. In a domestic environment, this product may
cause radio interference, in which case the user may be required to take
adequate measures.
VCCI Warning

LIMITED WARRANTY
D-Link provides this limited warranty for its product only to the person or
entity who originally purchased the product from D-Link or its authorized
reseller or distributor.
Limited Hardware Warranty: D-Link warrants that the hardware
portion of the D-Link products described below (“Hardware”) will be free
from material defects in workmanship and materials from the date of
original retail purchase of the Hardware, for the period set forth below
applicable to the product type (“Warranty Period”) if the Hardware is used
and serviced in accordance with applicable documentation; provided that a
completed Registration Card is returned to an Authorized D-Link Service
Office within ninety (90) days after the date of original retail purchase of the
Hardware. If a completed Registration Card is not received by an
authorized D-Link Service Office within such ninety (90) period, then the
Warranty Period shall be ninety (90) days from the date of purchase.
Product Type Warranty Period
Product (excluding power supplies and fans) One (1) Year
Power Supplies and Fans One (1) Year
Spare parts and spare kits Ninety (90) days
D-Link’s sole obligation shall be to repair or replace the defective Hardware
at no charge to the original owner. Such repair or replacement will be
rendered by D-Link at an Authorized D-Link Service Office. The
replacement Hardware need not be new or of an identical make, model or
part; D-Link may in its discretion may replace the defective Hardware (or
any part thereof) with any reconditioned product that D-Link reasonably
determines is substantially equivalent (or superior) in all material respects
to the defective Hardware. The Warranty Period shall extend for an
additional ninety (90) days after any repaired or replaced Hardware is
delivered. If a material defect is incapable of correction, or if D-Link
determines in its sole discretion that it is not practical to repair or replace
the defective Hardware, the price paid by the original purchaser for the
defective Hardware will be refunded by D-Link upon return to D-Link of the
defective Hardware. All Hardware (or part thereof) that is replaced by D-
Link, or for which the purchase price is refunded, shall become the property
of D-Link upon replacement or refund.