Comet Labs DS8E07 User manual

8-Port 10/100M
Fast Ethernet
Compact Switch
(Model DS8E07)

User’s Guide

i
FCC Warning
This equipment has been tested and found to comply with the
regulations 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 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 this user’s guide,
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.
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.

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TABLE OF CONTENTS
ABOUT THIS GUIDE ........................................................... 1
PURPOSE ................................................................................ 1
TERMS/USAGE ....................................................................... 1
OVERVIEW OF THIS USER’S GUIDE ........................................ 1
INTRODUCTION.................................................................. 3
FEATURES .............................................................................. 3
UNPACKING AND SETUP.................................................. 5
UNPACKING ........................................................................... 5
SETUP .................................................................................... 5
IDENTIFYING EXTERNAL COMPONENTS .................. 7
FRONT PANEL ........................................................................ 7
REAR PANEL .......................................................................... 7
LED INDICATORS .................................................................. 8
CONNECTING THE SWITCH............................................ 9
PC TO SWITCH ....................................................................... 9
HUB TO SWITCH................................................................... 10
A. 10BASE-T Hub ............................................................ 10
B. 100BASE-TX Hub ........................................................ 10
SWITCH TO SWITCH (OTHER DEVICES).................................. 10
PORT SPEED &DUPLEX MODE ............................................ 11
TECHNICAL SPECIFICATIONS..................................... 13

1
ABOUT THIS GUIDE
Congratulations on your purchase of the 8-port 10/100M
NWay Ethernet Switch. This device integrates 100Mbps Fast
Ethernet and 10Mbps Ethernet network capabilities in a highly
flexible desktop package.
Purpose
This manual discusses how to install your 8-port 10/100M
NWay Ethernet Switch.
Terms/Usage
In this guide, the term “Switch” (first letter upper case) refers
to your 8-port 10/100M NWay Ethernet Switch, and ”switch”
(first letter lower case) refers to other Ethernet switches.
Overview of this User’s Guide
Introduction.Describes the Switch and its features.
Unpacking and Setup.Helps you get started with the basic
installation of the Switch.
Identifying External Components.Describes the front panel,
rear panel and LED indicators of the Switch.
Connecting the Switch.Tells how you can connect the Switch
to your Ethernet network.
Technical Specifications. Lists the technical (general, physical
and environmental, and performance) specifications of the
Switch.

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INTRODUCTION
This chapter describes the features of the Switch and some
background information about Ethernet/Fast
Features
The Switch was designed for easy installation and high
performance in an environment where traffic on the network
and the number of user increase continuously.
The Switch with its small, compact size was specifically
designed for small to middle workgroups. This Switch can be
installed where space is limited; moreover, they provide
immediate access to a rapidly growing network through a wide
range of user-reliable functions.
The Switch is ideal for deployment with multiple high-speed
servers for shared bandwidth 10Mbps or 100Mbps workgroups.
With the highest bandwidth 200Mbps (100Mbps full-duplex
mode), any port can provide workstations with a congestion-
free data pipe for simultaneous access to the server.
The Switch is expandable by cascading two or more switches
together. As all ports support 200Mbps, the Switch can be
cascaded from any port and to any number of switches.
The Switch is a perfect choice for site planning to upgrade to
Fast Ethernet in the future. Ethernet workgroups can connect
to the Switch now, and change adapters and hubs anytime later
without needing to change the Switches or reconfigure the
network.
The Switch combine dynamic memory allocation with store-
and-forward switching to ensure that the buffer is effectively
allocated for each port, while controlling the data flow between

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the transmit and receive nodes to guarantee against all possible
packet loss.
The Switch is a managed 10/100 Fast Ethernet Switch that
offers solutions in accelerating small Ethernet workgroup
bandwidth. Other key features are:
Auto-MDI function supports automatic MDI/MDIX crossover
detection function gives true ‘plug and play’ capability without
the need of confusing crossover cables or crossover ports.
Store and forward switching scheme capability. As the result
of complete frame checking and error frame filtering, this
scheme prevents error packages from transmitting among
segments.
NWay Auto-negotiation for any port. This allows for auto-
sensing of speed (10/100Mbps) thereby providing you with
automatic and flexible solutions in your network connections.
Flow control for any port. This minimizes dropped packets by
sending out collision signals when the port’s receiving buffer is
full. Note that flow control is only available in half duplex
mode.
Data filtering/forwarding rate is wire-speed for 10Mbps and
100Mbps speed.
4K MAC address entry table per device with self-learning for
the Switch.
128KBytes RAM buffer per device for the Switch.

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UNPACKING AND SETUP
This chapter provides unpacking and setup information for the
Switches.
Unpacking
Open the shipping cartons of the Switch and carefully unpacks
its contents. The carton should contain the following items:
One 8-port 10/100M NWay Ethernet Switch
One external power adapter
This User’s Guide
If any item is found missing or damaged, please contact your
local reseller for replacement.
Setup
The setup of the Switch can be performed using the following
steps:
The surface must support at least 1.5 Kg for the Switch.
The power outlet should be within 1.82 meters (6 feet) of the
Switch.
Visually inspect the DC power jack and make sure that it is
fully secured to the power adapter.
Make sure that there is proper heat dissipation from and
adequate ventilation around the Switch. Do not place heavy
objects on the Switch.

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IDENTIFYING EXTERNAL COMPONENTS
This section identifies all the major external components of the
hub. Both the front and rear panels are shown, followed by a
description of each panel feature. The indicator panel is
described in detail in the next chapter.
Front Panel
The figure below shows the front panels of the switch.
LED Indicator Panel
Refer to the LED Indicator section for detailed
information about each of the hub’s LED indicators.
Rear Panel
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 the switch does not include a power switch, plugging its

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power adapter into a power outlet will immediately power it
on.
Auto-MDI Jacks:
These jacks supports automatic MDI/MDIX crossover
detection function gives true ‘plug and play’ capability without
the need of confusing crossover cables or crossover ports.
With the Auto-MDI function, you just need to plug-in the
network cable to the hub directly and no need to care if the end
node is NIC (Network Interface Card) or switches and hubs.
LED Indicators
Power Indicator (PWR)
This indicator lights green when the hub is receiving power,
otherwise, it is off.
Link/Activity
This indicator light green when the port is connected to a 10 or
100Mbps Fast Ethernet node, if the indicator blinking green
will be transmit or received data on the 100Mbps network.

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CONNECTING THE SWITCH
This chapter describes how to connect the Switch to your Fast
Ethernet network. In each of the following figures, the 8-port
10/100M NWay Ethernet Switch is shown.
PC to Switch
A PC can be connected to the Switch via a two-pair Category
3, 4, 5 UTP/STP cables. The PC (equipped with a RJ-45
10/100Mbps phone jack) should be connected to any of the 8
ports.
The LED indicators for PC connection dependent on the LAN
card capabilities. If LED indicators are not light after making a
proper connection, check the PC LAN card, the cable, the
Switch conditions and connections.
The following are LED indicator possibilities for a PC to
Switch connection:
1. The “100LINK/ACT, 10LINK/ACT” LED indicator
light green for hookup to 100Mbps speed or light
amber for hookup to 10Mbps speed.
2. The “Full-Duplex/Collision” LED indicator depends
upon LAN card capabilities for full-duplex or half-
duplex.

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Hub to Switch
A hub (10 or 100BASE-TX) can be connected to the Switch
via a two-pair Category 3, 4, 5 UTP/STP cable. The
connection is accomplished from the hub to any of the Switch
RJ-45 ports.
A. 10BASE-T Hub
For a 10BASE-T hub, the Switch LED indicators should light
up as the following:
“Full-Duplex/Collision” indicator is OFF.
“100LINK/ACT, 10LINK/ACT LED” indicator is light amber.
B. 100BASE-TX Hub
For a 100BASE-TX hub, the Switch LED indicators should
light up as the following:
“Full-Duplex/Collision” LED indicator is OFF.
“100LINK/ACT, 10LINK/ACT” LED indicator is light green.
Switch to switch (other devices)
The Switch can be connected to another switch or other devices
(routers, bridges, etc.) via a two-pair Category 3, 4, 5 UTP/STP
cable.
1. The “100LINK/ACT, 10LINK/ACT” LED indicator
light green for hookup to 100Mbps speed or light
amber for hookup to 10Mbps speed.
2. The “Full-Duplex/Collision” LED indicator depends upon
LAN card capabilities for full-duplex or half-duplex

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Port Speed & Duplex Mode
After plugging the selected cable to a specific port, the system
uses auto-negotiation to determine the transmission mode 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 set the duplex mode to half-
duplex.

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TECHNICAL SPECIFICATIONS
General
Standards IEEE 802.3 10BASE-T Ethernet
IEEE 802.3u 100BASE-TX Fast Ethernet
ANSI/IEEE 802.3 NWay Auto-negotiation
IEEE 802.3x Full duplex 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
10BASE-T: 2-pair UTP Cat. 3,4,5, EIA/TIA- 568 STP
100BASE-TX: 2-pair UTP Cat. 5, EIA/TIA-568 STP
Number of
Ports 8 x 10/100Mbps NWay Auto-MDI ports

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Physical and Environmental
DC inputs 7.5VDC/1.5A
Power
Consumption 7.5 watts. (Max.)
Temperature Operating: 0°~ 50°C, Storage: -10°~ 70°C
Humidity Operating: 10% ~ 90%, Storage: 5% ~ 90%
Dimensions 171 x 98 x 29 mm (W x H x D)
EMI: FCC Class B, CE Mark B, VCCI-B
Performance
Transmission
Method: Store-and-forward
Filtering
Address Table: 1K entries per device
Packet
Filtering/Forwar
ding Rate:
10Mbps Ethernet: 14,880/pps
100Mbps Fast Ethernet: 148,800/pps
MAC Address
Learning: Automatic update