Macsense Connectivity FDH-608-616 User Manual
1
User’s Manual
Dynamic Dual Speed Hub
(FDH-608/616)
R
acse n se
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II
Quick Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .III
Chapter 1 - General Features of a Hub . . . . . . . . . . . . . . . . . .1
General Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Cost Effective Stackable Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2 - A Quick Overview of Networking
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Network Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
What is a hub? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Chapter 3 - What Is Fast Ethernet? . . . . . . . . . . . . . . . . . . . . .7
Historical Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Ethernet and Fast Ethernet Standards . . . . . . . . . . . . . . . . . . . . . . . .7
Cables Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Chapter 4 - How to Configure a Fast Ethernet
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Uplinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Different Network Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Other Ways to Expand a Network . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chapter 5 - How to Install a Hub . . . . . . . . . . . . . . . . . . . . . .13
Before the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Connecting Hubs or Other Devices . . . . . . . . . . . . . . . . . . . . . . . . .15
Stacking the Dual-Speed Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Removing the Protective Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Checking Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Chapter 6 - Network Management . . . . . . . . . . . . . . . . . . . . .21
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Specifications of FDH-608 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Specifications of FDH-616 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
I
Introduction
Congratulations on your purchase of this Fast Ethernet Dual-Speed Hub!!
The Fast Ethernet Dual-Speed Hub consists of 8XRJ-45 ports for 10Mbps or
100Mbps Ethernet connection (determined by autosensing). This Dual-Speed hub
contains two internal repeaters - one for 10Mbps and another for 100Mbps traffic.
An internal Ethernet switch, consisting of a 10Mbps and a 100Mbps switching port,
is used to link the repeater buses. Data will be forwarded to the other internal
repeater bus under these three conditions: 1) when traffic has to be passed
between a 10Mbps and a 100Mbps device; 2) if the destination address is not
found in the address table; 3) when broadcast traffic is sent.
This hub is capable of storing the node address and the corresponding segment of each incoming packet in a routing table. The information on this routing
table helps to identify the traffic and directs fast (100BASE-TX) or slow (10BASEtraffic to the proper repeater buses. By separating the two repeater buses into different collision domains, the overall collisions that might occur are reduced relative
to the number that might occur if two traffic flows were to coexist in a singular collision domain.
Migration from 10Mbps Ethernet to 100Mbps Fast Ethernet environment usually
involves total abandonment of 10Mbps equipment and requires replacing upgrading to 100Mbps equipment. In contrast, Dual-Speed Hubs allow gradual migration
from one speed to another without throwing out 10Mbps network hardware.
This manual will introduce you to the main features of your hub, as well offer as
a brief introduction on networking terminology and topography. Tips for installation
and for everyday management of your network (including troubleshooting) are also
included to help you get started.
II
Quick installation
This hub provides an ideal bridge between 10Mbps and 100Mbps Ethernet networks, all for a price thatÕs comparable to a standard Ethernet or Fast Ethernet
hub. Moreover, the smart design built into the display panel provides a friendly
interface that simplifies installation and network troubleshooting. If you are already
familiar with basic network operations, you should be able to install this hub by following these steps:
1. Unpack the Fast Ethernet Dual-Speed Hub.
2. Find a location near an electrical outlet.
3. Set the Hub on a stable horizontal surface that is clear of electromagnetic interference. Make sure to turn the power off of the hub and any
other device that will be connected while installing network components.
4. Connect PCs or other network devices to the RJ-45 ports using
Category 5 UTP (UTP-5), Category 1 STP (STP-1) for 100BASE-TX, or
Category 3, 4, 5 UTP (UTP-3, 4, 5), Category 1 STP (STP-1), or equivalent cables for 10BASE-T. We recommend starting from the highestnumbered jack. All devices that will be connected to the hub have to be
equipped with Fast Ethernet adapters. The maximum cable length
between any end node in the network and the hub is 100 meters (328
feet) for Fast Ethernet.
5. Turn the power on the Fast Ethernet Dual-Speed Hub and all PCs and
network devices.
6. Verify network communication by observing the LED activities of power,
connection speed, and each individual nodes. The hub will indicate connections of ports by blinking the corresponding port indicator LEDs.
If problems arises while installing this Dual-Speed Hub, please refer to the
ÒInstallation ChapterÓ for more information of installation procedures, the ÒUplink
ChapterÓ for strategies on connecting networking devices together, or ÒTrouble
ShootingÓ for further references.
III
Chapter 1 - General Features of a Dual-Speed Hub
General Features of FDH-608 8-Port Dual-Speed Stackable Hub
Compliant with the IEEE802.3 10Mbps repeater specification (10BASE-T)
Compliant with the IEEE802.3u 100Mbps repeater specification (100BASE-TX)
8-port 10BASE-T for Ethernet connectivity
Supports Category 3, 4, 5 Unshielded Twisted-pair cabling (UTP-3,4,5)
Supports Category 1 Shielded Twisted-pair cabling (STP-1)
8-port 100BASE-TX for Fast Ethernet connectivity
Supports Category 5 Unshielded Twisted-pair cabling (UTP-5)
Supports Category 1 Shielded Twisted-pair cabling (STP-1)
One uplink port on the rear panel for connectivity to another Switch/Repeater hub
Individual port status LEDs for LINK, RX, 10/100, PAR and 10/100 Collision status
LEDs
General Features of FDH-616 16-Port Dual-Speed Stackable Hub
Compliant with the IEEE802.3 10Mbps repeater specification (10BASE-T)
Compliant with the IEEE802.3u 100Mbps repeater specification (100BASE-TX)
16-port 10BASE-T for Ethernet connectivity
Supports Category 3, 4, 5 Unshielded Twisted-pair cabling (UTP-3,4,5)
Supports Category 1 Shielded Twisted-pair cabling (STP-1) 16-port
16-port 100BASE-TX for Fast Ethernet connectivity
Supports Category 5 Unshielded Twisted-pair cabling (UTP-5)
Supports Category 1 Shielded Twisted-pair cabling (STP-1)
One uplink port on the rear panel connectivity to another Switch/Repeater hub
Individual port status LEDs for LINK/ACTIVITY and Collision status LEDs
General Features of a Dual-Speed Hub
1
Front panel
FDH-608
FDH-616
The Dual-Speed hubÕs front panel display features LED (light emitting diode)
indicators
Rear panel
FDH-608
FDH-616
The rear panel of the hub contains the power socket and Ethernet cable connectors. The hub's cable connectors are RJ-45 type cable jacks. RJ-45 stands for
Recommended Jack No. 45, an Electronic Industries Association (EIA) designation.
Each jack serves to connect a cable to the network device.
The jack label 1X is designated as an uplink jack. Uplink jacks are designed
for connections to other network devices.
4
8
3
7
2
6
11X
5
56
7
8
1
23
4
PWR
10M 100M
100M
PART
100M PART 100M PART 100M PART
LK RX LK RX LK RX LK RX
100M
PART
100M PART 100M PART 100M PART
LK RX LK RX LK RX LK RX
COL
56
7
8
1
23
4
PWR
10M 100M
100M
PART
100M PART 100M PART 100M PART
LK RX LK RX LK RX LK RX
100M
PART
100M PART 100M PART 100M PART
LK RX LK RX LK RX LK RX
COL
2
Chapter 1 - continued
NOTE: The jack adjacent to 1X must never be used at the same time.
LED indicators allow users to check each port's status and network traffic at a
glance. Extensive LEDs are displayed on the hub to allow easy network management.
The power socket accepts AC power of 115~230V at 50~60 Hz.
Cost-Effective Stackable Hubs
These Dual-Speed Stackable Hubs provide the quickest method of upgrading
your network to Fast Ethernet. There's no need to replace an existing network
infrastructure. Just add a Dual-Speed hub to link any new Fast Ethernet devices
into your current network. These Dual-Speed hubs bring you the immediate performance advantages of Fast Ethernet at an incremental cost. WhatÕs more, these
stackable hubs break Fast Ethernet's two-hub cascade barrier, allowing you to link
up to three hubs via the built-in stack ports (using any combination of these hub
models).
These Dual-Speed Hubs provide an effective solution for expanding Ethernet
and Fast Ethernet networks at a modest price. Up to three units can be stacked
together, supporting up to 24 (8-Port Fast Ethernet Dual-Speed Hub) or 48 users
(16-Port Fast Ethernet Dual-Speed Hub). To interconnect the 10 Mbps and
100Mbps segments, just add an FDH-608 or FDH-616 unit to the stack. However,
a single Fast Ethernet Dual-Speed Hub stack of only two units can easily meet the
networking needs of most small to medium-sized workgroups. As your workgroups
gradually expand, just add more hubs to your stack, or uplink to another hub or
switch using ordinary straight-through cable.
General Features of a Dual-Speed Hub
3
Chapter 2 - A Quick Overview of Networking Terminology
Network Terminology
A network is comprised of multiple interconnected nodes. A node can be a
computer, a server (that is, a computer dedicated to storing network data or applications), a shared peripheral (such as a printer or modem) or other networking
devices (such as repeaters or switches, routers, transceivers, etc.).
A Fast Ethernet network operates at a 100Mbps (Megabits per second) transfer
speed, as opposed to Ethernet networks, which operate at speeds of 10Mbps.
To be connected to a Fast Ethernet network, a node must be equipped with a
Fast Ethernet adapter or a network interface card (NIC). A twisted-pair cable connects the node to a hub. Each node is connected to one port on the hub. The port
possesses the abilities of a repeater, a transceiver and an adapter in a Fast
Ethernet network. Ports and cables are connected through a fixed jack.
Multiple segments can be connected by repeaters. All segments connect
together through switches (but not by routers, or bridges) to form a collision
domain.
Collisions occur when two or more nodes accidentally attempt to transmit data
across the network at the same time. This happens more often with increased traffic. Naturally, when you have more packets traveling across the network, the occurrence of collisions will increase. Although collisions do not cause any serious
harm, they can affect the speed at which all nodes on the network receive data.
Moreover, collisions prohibit twisted-pair cabling from being fully utilized, since one
of the cableÕs two twisted pairs must resolve collision conflicts instead of transmitting data.
What is a Hub?
In data communications, a hub is a place of convergence where data arrives
from one or more directions and is forwarded out in one or more other directions.
A port is comprised of an input/output circuit and any associated circuit. A jack,
on the other hand, is an external connector linked to a port. According to a hubÕs
design, one or more jacks can be connected to a single port.
Your hub displays different jacks on its external panel. One or more jacks are
connected to one internal port. The uplink jack features two jacks. One of them
acts as a regular port for data transferring while the other (X) serves to uplink the
A Quick Overview of Networking Terminology
5
hub to another hub or switch. By uplinking different hubs or switches together, the
number of nodes in a network can be increased. Expanding a network is necessary when planning to increase the number of computers connected, or when planning to offer new services, such as printing capabilities or Internet access.
Each port of a Dual-Speed Hub acts as an adapter (to conform to the network
environment), a transceiver (to carry data) and a repeater (to connect different segments together).
Four standard functions are performed by a Dual-Speed Stackable Hub:
- Repeating any signal that it receives from a connected node to another designated node by referencing the physical address number in the Address
Table.
- Checking the validity of each signal it receives and discarding invalid signals.
- Checking for collisions on the network and partitioning the collisioned nodes
to prevent further disruption of the network.
- Showing whether each network node is currently connected and idle, transmitting data, or in 10BASE-T/100BASE-TX mode.
However, according to the type of device that is connected to a hub, different
applications are supported. Typical applications performed by a hub are:
- Establishing peer-to-peer relations between workstations.
- Interconnecting users' workstations with a server for a stand-alone clientserver network.
- Interconnecting different users' workstations, servers, or other devices, and
uplinking with another Fast Ethernet Dual-Speed hub to form a larger network.
- Interconnecting different users' workstations or servers, or uplinking the hub
with another network device and providing a connection with another network
expansion device, such as a router, switch or bridge.
A hub thus acts as a central piece in a network topology and configuration. It is
necessary to carefully study its physical placement within the configuration of the
network for maximum efficiency.
6
Chapter 2 - continued
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