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

i
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

ii
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

iii
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.

1
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.

2
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.

3
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.

4
 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.

11
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.

12
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