8 Ports NWay Switching Hub
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 limitations 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 no 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 a different outlet from that the
receiver is connected.
!" Consult your local distributors or an experienced radio/TV
technician for help.
!" Shielded interface cables must be used in order to comply with
emission limits.
Changes or modifications to the equipment, which are not approved
by the party responsible for compliance could affect the user’s
authority to operate the equipment.
Copyright © 1999 All Rights Reserved.
Company has an on-going policy of upgrading its products and it may
be possible that information in this document is not up-to-date. Please
check with your local distributors for the latest information. No part of
this document can be copied or reproduced in any form without
written consent from the company.
Trademarks:
All trade names and trademarks are the properties of their respective
companies.
Table of Contents
1.
Unpacking Information
2.
Introduction To 8 Port NWay Switch
2.1
2.2
2.3
2.3.1
2.3.1.1
2.3.2
2.3.2.1
2.3.2.2
2.3.2.3
2.3.3
2.4
2.4.1
3.
Installing And Using 8 Port NWay Switch
3.1
3.1.1
3.1.2
3.1.2.1
3.1.2.2
4.
Installing The 8 Port NWay Switch
Desktop Installation
Installing Network Cables
Station Connection with Twisted-Pair Cable
Switch to Switch Connections with Twisted-Pair
Cable
Switching Operation
4.1
4.2
4.3
5.
General Description
Key Features
The Front Panel
System LEDs
Power LED
Port LEDs
100M LED
Link/Act LED
FDX/COL LED
Uplink Port
The Rear Panel
Power Connecting
MAC Address Table & Learning
Filtering and Forwarding
Store and Forward
Product Specifications
1.
Unpacking Information
Thank you for purchasing the 8-port NWay switching hub.
Before you start, please check all the contents of this package.
The product package should include the following:
1.
One 8-port NWay switching hub
2.
One external power supply
3.
User’s manual
4.
Screws and wall-mount plastic
2.
Introduction To 8 Port NWay Switch
2.1
General Description
The device is a powerful, high-performance Fast Ethernet
switching hub, with all 8 ports capable of 10 or 100Mbps
auto-negotiation operation (NWay) which means the switch could
automatically negotiate with the connected partners on the network
speed and duplex mode. It is ideal for micro-segmenting large
networks into smaller, connected subnets for improved performance,
enabling the bandwidth demanding multimedia and imaging
applications. Moreover, the 10/100Mbps auto-sensing ability provides
an easy way to migrate 10Mbps to 100Mbps network with no pain.
Compared to the shared 10Mbps or 100Mbps networks, the switching
hub delivers a dedicated 10/100Mbps connection to every attached
client with no bandwidth congestion issue.
Store-and-forward switching mode promises the low latency
plus eliminates all the network errors, including runt and CRC error
packets. To work under full-duplex mode, transmission and reception
of the frames can occur simultaneously without causing collisions as
well as double the network bandwidth.
The switching hub is plug-n-play without any software to
configure and also fully compliant with all kinds of network protocols.
Moreover, the rich diagnostic LEDs on the front-panel for providing the
operating status of individual port and whole system.
For network connection:
The switching hub can use the following types of cabling:
!" 10BASE-T Category 3, 4 or 5 UTP/STP
!" 100BASE-TX Category 5 UTP/STP
Category 5 cable is preferred to be used with this product
in structured wiring environments. This will ensure correct
operation of all ports at 10Mbps or 100Mbps.
2.2
Key Features
The switching hub provides the following key features:
!" Complies with 10BASE-T specifications of the IEEE802.3
standard
!" Complies with 100BASE-TX specifications of the IEEE802.3u
standard
!" Eight RJ-45 ports for 100Base-TX and 10Base-T connectivity
!" Supports NWay protocol for speed (10/100Mbps) and duplex
mode (Half/Full) auto-detection
!" One uplink port for cascading switch to switch or switch to hub
with no cross-over cable
!" Supports full and half duplex operation on all ports
!" Support back-pressure (half duplex) and flow control (IEEE
802.3x)
!" Wire-speed packet filtering and forwarding rate
!" Store-and-forward architecture filters fragment & CRC error
packets
!" Supports 4K MAC address entries in whole system
!" 256KBytes buffer memory
!" Supports extensive LED indicators for network diagnostics
!" External power adapter
!" FCC Class A, CE
2.3
The Front Panel
The front panel of the switching hub is shown below.
The auto-negotiation feature of the switching hub allows each
port of the device running at one of the following four operation
modes:
1. 100Mbps full-duplex
2. 100Mbps half-duplex
3. 10Mbps full-duplex
4. 10Mbps half-duplex
Port 1 can be used as an uplink port for connecting to another
unit without using crossover cable. When using the uplink port, you
can extend the distance to 100m for linking another switch or hub.
Warning: The RJ-45 ports are shielded data sockets. They can not
be used as telephone sockets. Only RJ45 plugs are
allowed to connect these sockets.
2.3.1
System LEDs
System LED indicators are located on the front panel for
showing the operating status of the whole device.
2.3.1.1 Power LED
This indicator lights green when the hub is receiving power;
otherwise, it is off.
2.3.2
Port LEDs
Port LED indicators are located on the front panel for showing
the operating status of each port.
2.3.2.1 100M LED
The 100M LED indicates the link speed of each port. If the LED
light green then the connection speed is 100Mbps, off for 10Mbps.
2.3.2.2 Link/Act LED
Every port has a Link/Activity LED. Steady green (link state)
indicated that the port has good linkage to its associated device.
Flashing green indicates that the port is receiving or transmitting data
between its associated device.
If the port is connected but the Link/Activity LED is dark, check the
following items:
1. The switching hub and the connected device’s power are on or not
2. The port’s cable is firmly seated in its connectors in the switching
hub and in the associated device.
3. The connecting cable is good and with correct type
4. The connecting device, including any network adapter is
functioning.
From the Speed LED and Link/Activity, we could judge the connection
speed as following:
Speed LED
Off
Off
Green
2.3.2.3
Link/Activity LED
Off
Green
Green
Status
No Connection
Connect as 10Mbps
Connect as 100Mbps
FDX/COL LED
A collision occurs when two stations within a collision domain
attempt to transmit data at the same time. Intermittent flashing amber
of the collision LED is normal; the contending adapters resolve each
collision by means of a wait-then-retransmit algorithm. Frequency of
collisions is an indicator of heavy traffic on the network.
If the FDX/COL light green which means the port is under
full-duplex operation or dark for half-duplex mode. The following table
is a summary of Port LEDs.
LED
100M
Link/Act
FDX/COL
2.3.3
Operation
100Mbps (Green), 10Mbps (Off)
Link is present (Green), Activity (Blinking Green)
Full-Duplex (Amber), Half-Duplex (Off), COL
(Blinking Amber)
Uplink Port
The uplink port is an alternative port to port 1 and user could
use this port for switch to hub or switch to switch connection without
cross-over cable.
2.4
2.4.1
The Rear Panel
The rear panel of the hub is shown below
Power Connecting
Plug the circle end of the power adapter firmly into the rear
panel of the switching hub, and the other end into an electric service
outlet then the system is ready.
3.
Installing And Using 8 Port NWay Switch
3.1
Installing The 8 Port NWay Switch
The hub does not require software configuration. Users can
immediately use any of the features of this product simply by
attaching the cables and turning the power on.
3.1.1 Desktop Installation
To locate the switching hub on the desktop and place the hub on
a clean, flat desk or table close to a power outlet. Plug in all network
connections and the power cord, then the system is ready.
When deciding where to put the switching hub then you must ensure:
!" It is accessible and cables can be connected easily
!" Cabling is away from:
Sources of electrical noise such as radios, transmitters and
broadband amplifiers
Power lines and fluorescent lighting fixtures.
!" Water or moisture can not enter the unit
!" Air flow around the unit and through the vents in the side of the
case is not restricted (company recommend that you provide a
minimum of 25mm inch clearance)
To prolong the operational life of your units:
!" Never stack units more than eight high if freestanding.
!" Do not place objects on top of any unit or stack
!" Do not obstruct any vents at the sides of the case
3.1.2 Installing Network Cables
After placing the hub on the desktop, then we need to know how
to connect the device to network.
3.1.2.1 Station Connections with Twisted-Pair Cable
Connect each station to the hub by a twisted-pair straight cable
(10BASE-T or 100BASE-T cables). Plug one RJ-45 connector into a
front-panel port of the hub, and plug the other RJ-45 connector into
the station’s network adapter.
3.1.2.2 Switch to Switch Connections with Twisted-Pair Cable
In making a switch to switch connection, you could use uplink
port to connect another switch with no crossover cable. The uplink
connector is wired to the same conductors as the port 1 connector,
but with certain pin positions interchanged to provide a crossover, and
thus allow using a straight cable to make a switch to switch
connection.
Keep in mind that the uplink connector is not an independent
port. It is only an alternative connector to port 1 for switch to switch
cabling. Port 1 is fully occupied whenever
1.
A switch to switch connection is made through its uplink
connector, or
2.
Any kind of connection is made directly through the port 1
connector.
4.
4.1
Switch Operation
MAC Address Table and Learning
The switching hub is implemented with a MAC address table
which is composed of many entries. Each entry is used to store the
address information of network nodes on the network, including MAC
address, port ID, etc. The information is the most important base to do
packet filtering and forwarding.
When one packet comes in from any port, the switching hub will
learn the source address, port ID, and the other related information in
address table. Therefore, the content of the MAC table will update
dynamically.
4.2
Filtering and Forwarding
When one packet comes in from any port of the switching hub, it
will check the destination address besides the source address
learning. The hub will look up the address table for the destination
address. If not found, this packet will be forwarded to all the other
ports except the port which this packet comes in. If found, and the
destination address is located at different port from this packet comes
in, the packet will be forwarded to the port where this destination
address is located according to the information of address table. But,
if the destination address is located at the same port as this packet
comes in then this packet will be filtered.
4.3
Store and Forward
Store-and-forward is one kind of packet-forwarding methodology.
As a store-and-forward switching hub, it will store the complete packet
in the internal buffer and do the complete error checking before
transmitting to the network. Therefore, no error packets will disturb the
network. It is the best choice when a network needs efficiency and
stability.
5.
Product Specifications
Standard
IEEE802.3, 10BASE-T
IEEE802.3u, 100BASE-TX
Interface
RJ-45 x 8 NWay switching ports
One uplink port (an alternative to
port 1)
Cable Connections
RJ-45 (10BASE-T) :
UTP Category 3,4,5
RJ-45 (100BASE-TX) :
UTP Category 5
Network Data Rate
Auto-negotiation (10Mbps,100Mbps)
Transmission Mode
Auto-negotiation (Full-duplex,
Half-duplex)
LED indications
System
Power x1
Port
100M
Link/Activity
FDX/COL
System Buffer Memory
256KByte
MAC Address Table
4K entries
Filtering/Forwarding Rate 10Mbps: 14,880pps/14,880pps
100Mbps: 148,800pps/148,800pps
Emission
FCC Class A, CE
Operating Temperature
00 ~ 500C (32 ~ 1220F)
Operating Humidity
10% - 90%
Power Supply
100~240 VAC, 50/60 Hz
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