D-Link DSS-16+ User manual

2D-Link DSS-16+ User Manual
Table of Contents
Product Overview ........................................................3
Package Contents ...................................................3
Setup .......................................................................3
Introduction ..............................................................4
Features ...................................................................8
Hardware Overview .................................................9
Front Panel (LEDs) ............................................ 9
Front Panel (Connections) ...............................10
Unpacking and Setup ................................................11
Setup .....................................................................11
Desktop Installation ...............................................12
Rack Mounting .......................................................13
Installation ..................................................................14
Connecting the Switch ...........................................15
PC to DSS-16+ ................................................ 15
Hub/Switch to DSS-16+ ................................... 15
DSS-16+ to Other Devices ..............................15
Port Speed & Duplex Mode .............................16
Troubleshooting .........................................................17
Technical Specifications ........................................... 18
DSS-16+ Specifications ......................................... 18
RJ-45 Pin Specifications ........................................19
Contacting Technical Support ..................................20
Warranty .....................................................................21
Registration ................................................................ 26
Table of Contents

3D-Link DSS-16+ User Manual
Section 1 - Product Overview
• D-Link DSS-16+ 16-port Switch
• Manual and Warranty on CD
• Four (4) Rubber Feet
• Rack Mount Kit
• Power Adapter
Setup
The setup of the DSS-16+ can be performed using the following steps:
• The power outlet should be within 1.82 meters (6 feet) of the Switch.
• Do not cover the ventilation holes on the sides of the Switch, and make sure there is adequate ventilation
around it.
• Do not place heavy objects on the switch.
Product Overview
Package Contents

4D-Link DSS-16+ User Manual
Section 1 - Product Overview
The D-Link® DSS-16+ unmanaged switch with (16) 10/100BASE-TX ports is a solution for the small business looking
to expand network connectivity at an affordable price. The D-Link Express EtherNetwork® line of products combine
ease of use, with unsurpassed performance for an exceptional value.
Ease of Use
The DSS-16+ is truly a Plug-&-Play switch, with features like:
• Auto Speed Sensing - The Switch senses whether a network device is running at 10Mbps or 100Mbps and
automatically adjusts for optimal performance.
• Auto Negotiation (Full or Half Duplex) - Whether you are running at Half- or in Full-Duplex, the Switch automatically
negotiates and runs the highest supported transmission rate.
• Auto MDI/MDIX Crossover - All ports support auto-negotiating MDI/MDIX detection, which eliminates the need
for crossover cables or uplink ports. Every port can be connected to another switch or PC Station.
The DSS-16+ is the perfect choice for Plug-&-Play support for 10BASE-T and 100BASE-TX networks.
Wire-speed Performance
The DSS-16+ features a non-blocking wire-speed architecture, with a 3.2Gbps switching capacity, for maximum data
throughput. The DSS-16+ also features an integrated universal power supply, and per port diagnostics LEDs that make
it easy to “spot check” for problems. With wire-speed filltering and Store-and-Forward switching, the DSS-16+ maximizes
network performance while minimizing the propagation of bad network packets.
Quality of Service
The DSS-16+ supports 802.1p Quality of Service (QoS). QoS assists in the prompt delivery of time sensitive data
such as voice, video, and gaming traffic. When frames enter the switch with 802.1p priority tags, they are automatically
placed in one of two built-in hardware queues. Frames with higher priority tags are then passed through the switch
more efficiently, helping eliminate jitter and lag in VoIP and multimedia traffic.
Introduction

5D-Link DSS-16+ User Manual
Section 1 - Product Overview
Fast Ethernet Technology
The growing importance of LANs and the increasing complexity of desktop computing applications are fueling the need
for high performance networks. 100BASE-TX (Fast Ethernet) provides a cost-effective and high-performance solution for
small workgroups, SMBs (Small to Medium Businesses), and any network supporting bandwidth-intensive applications.
Fast Ethernet technology operates at 10 times the speed of traditional Ethernet, offering maximum performance and
enhanced capability for existing Ethernet-based networks.
100Mbps Fast Ethernet is a 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 100Mbps Fast Ethernet is compatible with all other 10Mbps Ethernet environments, it provides
a straightforward upgrade and takes advantage of the existing investment in hardware, software, and personnel
training.
Switching Technology
Switching is a cost-effective way of increasing the total network capacity available to users on a LAN. If an Ethernet
network begins to display symptoms of congestion, low throughput, slow response times, and high rates of collision,
installing a switch to a network can preserve much or all of the existing network’s cabling and workstation interface card
infrastructure, while still greatly enhancing the throughput for users. A switch is a viable solution even if demanding
applications, such as multimedia production and video conferencing, are on the horizon. The most promising techniques,
as well as the best return on investment, could well consist of installing the right mixture of Ethernet switches.
Exceptional Value
Each DSS-16+ is backed by a 3-Year warranty and comes standard with free 24/7 tech support*. By combining ease
of use, unsurpassed 10/100BASE-TX switching performance, and world-class support, the DSS-16+ raises the
price-performance bar for unmanaged Layer 2 switching.
* Available in USA only

6D-Link DSS-16+ User Manual
Section 1 - Product Overview
A switch increases capacity and decreases network loading by dividing a local area network into different LAN
segments. Dividing a LAN into multiple segments is one of the most common ways of increasing available bandwidth.
If segmented correctly, most network traffic will remain within a single segment, enjoying the full-line speed bandwidth
of that segment.
Switches provide full-line speed and dedicated bandwidth for all connections. This is in contrast to hubs, which use the
traditional shared networking topology, where the connected nodes contend for the same network bandwidth. When
two switching nodes are communicating, they are connected with a dedicated channel between them, so there is no
contention for network bandwidth with other nodes. As a result, the switch reduces considerably, the likelihood of traffic
congestion.
For Ethernet networks, a switch is an effective way of eliminating the problem of chaining 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 Ethernet network beyond the 100-meter network diameter limit for 100BASE-TX networks. Switches supporting
both 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between existing 10Mbps networks and
newer 100Mbps networks.
Switching LAN technology is a marked improvement over the previous generation of network hubs and bridges, which
were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost of
a router, the setup and maintenance required, make routers relatively impractical. Today switches are an ideal solution
to most kinds of local area network congestion problems.

7D-Link DSS-16+ User Manual
Section 1 - Product Overview
IEEE802.1P and QoS
The DSS-16+ switch supports 802.1p priority queuing Quality of Service. The implementation of QoS (Quality of Service)
and benefits of using 802.1p priority queuing are described here.
Advantages of QoS
QoS is an implementation of the IEEE 802.1p standard that allows network administrators a method of reserving
bandwidth for important functions that require a large bandwidth or have a high priority, such as VoIP (voice-over Internet
Protocol), web browsing applications, file server applications or video conferencing. Not only can a larger bandwidth
be created, but other less critical traffic can be limited, so bandwidth can be saved. The switch has separate hardware
queues on every physical port to which packets from various applications are mapped to and assigned a priority.
Mapping QoS on the Switch
In order to implement QoS, the switch will examine the header of a packet to see if it has the proper identifying tag
tagged. Then the switch forwards these tagged packets to designated queues on the switch where they will be emptied,
based on priority.
“The DUT supports strict mode for 802.1p QoS. An untagged packet will follow priority 0 to work (i.e. class 0).”
Understanding QoS
The switch has two priority queues labeled 1 (higher queue), and 0 (lower queue). The eight priority tags, specified in
IEEE 802.1p are mapped to the Switch’s priority tags as follows:
Priority 0 is assigned to the Switch’s Q0 queue.
Priority 1 is assigned to the Switch’s Q0 queue.
Priority 2 is assigned to the Switch’s Q0 queue.
Priority 3 is assigned to the Switch’s Q0 queue.
Priority 4 is assigned to the Switch’s Q1 queue.
Priority 5 is assigned to the Switch’s Q1 queue.
Priority 6 is assigned to the Switch’s Q1 queue.
Priority 7 is assigned to the Switch’s Q1 queue.
The switch uses strict priority for Scheduling. In strict priority-based scheduling, any packets residing in the higher
priority queues are transmitted first.

8D-Link DSS-16+ User Manual
Section 1 - Product Overview
Features
The DSS-16+ is designed for easy installation and high performance in an environment where traffic on the network
and the number of users increase continuously.
• 16-port 10/100BASE-TX Ethernet Switch with RJ-45 connectors
• Supports Auto-negotiation of speed and duplex modes for each port
• Supports Auto-MDI/MDI-X for each port
• Wire speed reception and transmission
• Store-and-Forward switching method
• Integrated address Look-Up Engine, supports 8K absolute MAC addresses
• 802.1p Priority Queuing for mission critical applications
• Front-panel diagnostic LEDs
• IEEE 802.3x flow control for full-duplex
• Back pressure flow control for half-duplex

9D-Link DSS-16+ User Manual
Section 1 - Product Overview
Hardware Overview
Front Panel (LEDs)
Power:
This indicator lights green when the switch is receiving power; otherwise, it is off.
Link / Act (Link/Activity):
This indicator lights on when the port is connected to a Fast Ethernet or Ethernet device; if the light is blinking, it indicates
that data is being transmitted or received.
FDX / Col (Full-duplex/Collision):
This LED indicator lights green when a respective port is in full duplex (FDX) operation mode. Otherwise, it is blinking
when collisions are occurring on the respective port in half duplex operation mode.
100Mbps:
This LED indicator lights green when the port is connected to a 100Mbps Fast Ethernet station. Otherwise, the LED
is off when the port is connected to a 10Mbps Ethernet device.

10D-Link DSS-16+ User Manual
Section 1 - Product Overview
Auto MDI/MDI-X Ports (1-16):
All ports support automatic MDI/MDI-X crossover detection. The AutoMDI/MDI-X function makes it simple to connect
to the switch—just plug either a Crossover or Straight-Through CAT5 cable into any port.
AC Power Jack (on back):
Power is supplied through an external AC power adapter. Check the technical specification section for information
about the AC power input voltage.
Since the DSS-16+ does not require a power button, plugging its power adapter into a power outlet will immediately
power it on.
Front Panel (Connections)

11D-Link DSS-16+ User Manual
Section 2 - Unpacking and Setup
Unpacking and Setup
This chapter provides unpacking and setup information for the DSS-16+. Unpacking Open the shipping carton for the
Switch and carefully unpack its contents. The carton should contain the following items:
• One DSS-16+ 16-port 10/100Mbps Fast Ethernet Switch
• One AC power cord, suitable for your area’s electrical power connections
• Four rubber feet to be used for shock cushioning
• Screws and two mounting brackets
• This User’s Guide
If any item is found missing or damaged, please contact your local reseller for replacement.
Setup
Please consider the following when setting up the Switch:
• The surface must support at least 5 kg (11.02 lbs).
• The power outlet should be within 1.42 meters (6 feet) of the device.
• Visually inspect the power cord and see that it is secured fully to the AC power connector.
• Make sure that there is proper heat dissipation from and adequate ventilation around the Switch. Do not place
heavy objects on the Switch.

12D-Link DSS-16+ User Manual
Section 2 - Unpacking and Setup
Desktop Installation
When installing the Switch on a desktop, the rubber feet included with the device must be attached first. Attach these
cushioning feet on the bottom at each corner of the device. Allow enough ventilation space between the device and
the objects around it.

13D-Link DSS-16+ User Manual
Section 2 - Unpacking and Setup
Then, use screws provided with the equipment rack to mount each switch in the rack.
Rack Mounting
The DSS-16+ can be mounted in an EIA standard-size, 19-inch rack, which can be placed in a wiring closet with other
equipment. Attach the mounting brackets at the switch’s front panel (one on each side), and secure them with the
provided screws.

14D-Link DSS-16+ User Manual
Section 3 - Installation
Installation
This section will explain how to connect Ethernet devices to your new D-Link switch and how to mount the switch.

15D-Link DSS-16+ User Manual
Section 3 - Installation
Connecting the Switch
PC to DSS-16+
A computer can be connected to the DSS-16+ via a two-pair Category 3, 4, 5 UTP/STP Straight-Through or Crossover
cable. A computer equipped with a RJ-45 10/100Mbps port can be connected to any of the sixteen DSS-16+ ports.
The LED indicators for the PC connection depend on the capability of the computer’s Ethernet card. If the LED indicators
are not lit after making a proper connection, check the computer’s Ethernet card, the cable, and the DSS-16+’s conditions
and connections.
Hub/Switch to DSS-16+
A hub (10 or 100BASE-TX) can be connected to the DSS-16+ via a two-pair Category 3, 4, or 5 UTP/STP
Straight-Through or Crossover cable. For 100Mbps operation a Category 5 cable must be used. The connection is
accomplished from any port of the hub to any port of the DSS-16+.
DSS-16+ to Other Devices
The DSS-16+ can be connected to another switch or other devices (routers, bridges, etc.) via a two-pair Category 3, 4,
5 UTP/STP Straight-Through or Crossover cable. A Category 5 (or higher) cable must be used for 100Mbps operation.
The connection can be accomplished from any (MDI-X) port on the DSS-16+ to any of the 10Mbps or 100Mbps
(MDI-X) ports on another switch or other devices.

16D-Link DSS-16+ User Manual
Section 3 - Installation
Port Speed & Duplex Mode
After plugging the selected cable to a specific port, the system uses auto-negotiation to determine the transmission
mode, auto-detecting the network speed (10Mbps or 100Mbps) for any new 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 half-duplex mode is selected.

17D-Link DSS-16+ User Manual
Section 5 - Troubleshooting
Troubleshooting
1. Why can´t I share my Internet connection to multiple computers when using my D-Link DSS-16+ switch?
If you are connecting directly to a Cable or DSL modem, you will need a router to “share” your Internet connection or
a computer using ICS (Internet Connection Sharing) or Proxy. Switches and hubs do not allow you to share a single
IP address to multiple computers.
Another alternative is to contact your ISP and purchase extra IP addresses for each additional computer.
2. Does the DSS-16+ switch have an uplink port?
The DSS-16+ has Auto-MDI ports which automatically sense the type of cable being used (e.g. Straight-through or
Crossover) and adjust themselves accordingly to pass data over the network.
3. What is the maximum length of Category 3, 4 or 5 twisted pair cable that can be used between the DSS-16+
and other devices such as routers, switches, computers, etc.?
The maximum length of Category 3, 4 or 5 twisted pair cable that can be used between computers and other devices
on a network is 100 meters or about 328 feet. Keep in mind that this is a theoretical limit. Usually, you will want to keep
the distance between devices well below the limit.
4. What is Store-and-Forward switching?
Store-and-Forward switching will wait until the entire frame has arrived prior to forwarding it. This method stores the
entire frame in memory. Once the frame is in memory, the switch checks the destination address, source address,
and the CRC. If no errors are present, the frame is forwarded to the appropriate port. This process ensures that the
destination network is not affected by corrupted or truncated frames.

18D-Link DSS-16+ User Manual
Appendix A - Technical Specifications
Technical Specifications
DSS-16+ Specifications
Standards: IEEE 802.3 10BASE-T Ethernet
IEEE 802.3u 100BASE-TX Fast Ethernet
IEEE 802.3 Nway Auto-negotiation
IEEE 802.3x Flow Control
IEEE 802.1p Quality of Service (QoS)
Data Transfer Rate: Ethernet: 10Mbps (half duplex)
20Mbps (full-duplex)
Fast Ethernet: 100Mbps (half duplex)
200Mbps (full- duplex)
Network Cables: 10BASE-T: 2-pair UTP Cat. 3,4,5 (100 m), EIA/TIA- 568 100-ohm STP (100 m)
100BASE-TX: 2-pair UTP Cat. 5 (100 m), EIA/TIA-568 100-ohm STP (100 m)
Switch Fabric: 3.2Gbps
Packet Buffer Memory: 1.25Mb
Number of Ports: 16 x 10/100Mbps auto-negotiation, auto MDI-X ports
Power Consumption: 6.0 watts (Max.)
Temperature: Operating: 0-40° C (32-104° F)
Humidity: Operating: 10%~90% RH, Non-Condensing, Storage: 5%~95% RH, Non-Condensing

19D-Link DSS-16+ User Manual
Appendix A - Technical Specifications
Dimensions (W x H x D): (WxHxD) 280mm x 44mm x 180mm (11.02in x 1.73in x 7.09in)
Emissions: FCC Class A, CE Class A, VCCI Class A
Safety: cUL
Weight: 4.3 lbs.
Transmission Method: Store-and-forward
Packet Forwarding: 148,800pps per port (100BASE-TX half-duplex)
14,880pps per port (10BASE-T half-duplex)
MAC Address Learning: Automatic update
RJ-45 Pin Specifications
The following table shows the standard RJ-45 receptacle/connector and their pin assignments.
RJ-45 Connector pin assignment
Contact Media Direct Interface Signal
1 Rx +(receive)
2 Rx - (receive)
3 Tx + (transmit)
4 Not used
5 Not used
6 Tx - (transmit)
7 Not used
8 Not used

20D-Link DSS-16+ User Manual
Appendix B - Contacting Technical Support
Contacting Technical Support
D-Link provides free technical support for customers within the United States and within Canada for the duration of
the warranty period on this product. U.S. and Canadian customers can contact D-Link technical support through our
web site or by phone.
Before you contact technical support, please have the following ready:
• Model number of the product (e.g. DSS-16+)
• Hardware Revision (located on the label on the bottom of the switch (e.g. rev A1))
• Serial Number (s/n number located on the label on the bottom of the switch).
You can find software updates and user documentation on the D-Link website as well as frequently asked questions
and answers to technical issues.
For customers within the United States:
Phone Support:
[phone]
24 hours a day, seven days a week.
Internet Support:
http://support.dlink.com
suppor[email protected]
For customers within Canada:
Phone Support:
[phone]
Monday to Friday 7:30am to 9:00pm EST
Internet Support:
http://support.dlink.ca
email:suppor[email protected]