KTI Networks KF-16M User manual

Installation Guide
16-port Dual-speed
Ethernet / Fast Ethernet Hub
KF-16M, KF-16MS
P/N:750-0105-001
DOC.980301-KF16M/16MS-K

Ó1998 KTI Networks Inc. All rights reserved. No part of this docu-
mentation may be reproduced in any form or by any means or used to
make any directive work (such as translation or transformation) without
permission from KTI Networks Inc.
KTI Networks Inc. reserves the right to revise this documentation and to
make changes in content from time to time without obligation on the
part of KTI Networks Inc. to provide notification of such revision or
change.
For more information, contact:
United States KTI Networks Inc.
P.O. BOX 631008
Houston, Texas 77263-1008
Phone: [phone]
Fax: [phone]
BBS: 713-2663015
E-mail: [email protected]
WWW: http://www.ktinet.com/
International Fax: [phone]
BBS: 886-2-26983913
E-mail: [email protected]
WWW: http://www.ktinet.com/

16-port Dual-speed
Ethernet / Fast Ethernet Hub
Installation Guide
DOC.980302-KF16M/16MS-NK
P/N: 750-0105-002

The information contained in this document is subject to change without prior notice.
Copyright Ó KTI. All Rights Reserved.
TRADEMARKS
Ethernet is a registered trademark of Xerox Corp.
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 limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equip-
ment generates, uses, and can radiate radio frequency energy and if not installed and used in accor-
dance with the instruction manual may cause harmful interference in which case the user will be re-
quired to correct the interference at his own expense.
NOTICE:
(1) The changes or modifications not expressively approved by the party responsible for
compliance could void the users authority to operate the equipment.
(2) Shielded interface cables and AC power cord, if any, must be used in order to comply with the
emission limits.
CISPR A COMPLIANCE:
This device complies with EMC directive of the European Community and meets or exceeds the fol-
lowing technical standard.
EN 55022 - Limits and Methods of Measurement of Radio Interference Characteristics of Information
Technology Equipment. This device complies with CISPR Class A.
WARNING: This is a Class A product. In a domestic environment this product may cause radio inter-
ference in which case the user may be required to take adequate measures.
CE NOTICE
Marking by the symbol CE indicates compliance of this equipment to the EMC directive of the
European Community. Such marking is indicative that this equipment meets or exceeds the following
technical standards:
EN 55022: Limits and Methods of Measurement of Radio Interference characteristics of Information
Technology Equipment.
EN 50082/1:Generic Immunity Standard -Part 1: Domestic Commercial and Light Industry.
EN 60555-2: Disturbances in supply systems caused by household appliances and similar electrical equipment
- Part 2: Harmonics.

Table of Contents
1. Introduction ............................................................................... 1
1.1 Features ..................................................................................................................2
1.2 Dual-speed Hub Technology .................................................................................3
1.3 Specifications .........................................................................................................5
2. Installing the Dual-speed Hub .................................................. 6
2.1 Packing List............................................................................................................6
2.2 Mounting the Hub ..................................................................................................6
2.3 Front Panel and Rear Panel....................................................................................8
2.4 Cascading Multiple Hubs ....................................................................................10
3. Making Network Connections ................................................ 12
3.1 Dual-speed Twisted-pair Ports.............................................................................12
3.2 Hub Stack Connection .........................................................................................16
4. LED Indicators ........................................................................ 17
4.1 LED Panel ............................................................................................................17
4.2 Interpretation ........................................................................................................17

Figures
1-1 Dual-speed Ethernet / Fast Ethernet Hub Unit ......................................................1
1-2 Dual-speed Hub Design .........................................................................................3
1-3 Dual-speed Hub with Built-in 10/100 Switch .......................................................4
2-1 Desktop Mounting .................................................................................................6
2-2 Install Rack Mount Brackets ................................................................................. 7
2-3 Install the Hub into a 19-inch Rack ....................................................................... 7
2-4 Components on the Front and Rear Panel .............................................................8
2-5 Cascading Two Hubs ...........................................................................................10
2-6 Cascading Four Hubs in One Stack .....................................................................11
2-7 A Hub Stack Containing one KF-16MS..............................................................11
3-1 Dual-speed TP Ports.............................................................................................12
3-2 Straight-through UTP and Crossover UTP..........................................................13
3-3 Connecting to Computers ....................................................................................14
3-4 Connecting to 10BASE-T Hubs ..........................................................................14
3-5 Connecting to a 100BASE-TX Class II Hub.......................................................15
3-6 Connecting Two Hub Stacks ...............................................................................16
3-14 Connecting Two Hub Stacks ...............................................................................16
4-1 LED Indicators .....................................................................................................17

1. Introduction
This guide covers the product information and installation information
for two dual speed Fast Ethernet hubs. One is KF-16M which provides
16 dual-speed twisted-pair (TP) ports. The other is KF-16MS which
provides 16 dual-speed TP ports and one internal 10M-to-100M switch
for bridging the 10Mbps network and 100M network in the hub.
Figure 1-1 Dual-Speed Ethernet / Fast Ethernet Hub Units
Both hubs comply with IEEE 802.3 and IEEE 802.3u repeater specifi-
cations. Both support 10Mbps and 100Mbps connectivity over UTP
cabling in the same hub. All of the TP ports support auto-sensing func-
tion that allows the hub to detect the connection speed automatically.
This features can protect your existing Ethernet investment without any
rewiring and also provides a migration path for upgrading from 10Mbps
to 100Mbps. Through the built-in 10M-to-100M switch, KF-16MS can
bridge the Ethernet network and Fast Ethernet network together.
1

Both hubs also feature cascade connectors (two for KF-16M, one for
KF-16MS) on the rear for cascading one hub to another in a hub stack.
Up to four hubs can be cascaded in one stack. A hub stack can be treated
as a single hub which gives a total of 64 dual-speed TP ports with only
one hop count.
1.1 Features
The hub provides the following features:
• Complies with IEEE 802.3 and IEEE 802.3u standard for Class II
Fast Ethernet repeater
• Provides 16 fixed dual-speed TP ports. Each port can support
either the Ethernet 10Mbps connection or a Fast Ethernet
100Mbps connection with auto-sensing the connection speed.
• The hub provides one uplink jack that allows easy linking of two
hubs via straight-through UTP cable.
• The TP ports are implemented with auto partition and reconnect-
ing function to protect the network from failure caused by con-
secutive collisions from a specific port.
• The jabber function is implemented to prevent reception of
illegally long packet, which would degrade network performance.
• The internal 10M-to-100M switch in KF-16MS provides address
learning, filtering, and packet forwarding functions to bridge the
traffic between the Ethernet segment and the Fast Ethernet
segment. Only one KF-16MS is needed in a hub stack.
• Each hub provides daisy-chain connection for cascading up to 4 hubs per
stack with total of 64 TP ports. A hub stack may be composed of four
KF-16M units or three KF-16M with one KF-16MS unit.
• Two hub stacks can be connected through a UTP cable as an
expansion (up to 126 ports) is needed.
• The hub provides comprehensive LED indicators to indicate the
hub status and port status.
• Desktop and 19-inch rack mountable
2

1.2 Dual-speed Hub Technology
Dual-speed hub is designed to support connections with different speeds
in the same hub. It makes a network planning simpler, especially when
an environment is containing 10Mbps Ethernet and 100Mbps Fast Eth-
ernet technologies. It also allows a smooth migration from an Ethernet
network to a Fast Ethernet network.
A dual-speed hub is actually equipped with one 10Mbps repeater and
one 100Mbps repeater in one hub unit. Each repeater serves one shared
network segment. The repeater receives transmissions from any of its
ports and retransmits them to all its other ports. The TP port of the hub
can auto-sense the speed (10M or 100M) of its connection and switch to
either 10Mbps shared segment or 100Mbps shared segment automati-
cally. The internal design of a dual-speed hub, KF-16M, is illustrated as
follows:
Figure 1-2 Dual-speed Hub Design
3

KF-16MS is equipped with an internal 10M-to-100M switch function to
bridge the traffics between 10Mbps segment and 100Mbps segment as
follows:
Figure 1-3 Dual-speed Hub with Built-in 10/100 Switch
The 10M-to-100M switch can perform packet forwarding from one seg-
ment to another at wire speed. It also performs the address filtering that
only forwards those packets which need to cross 10M and 100M seg-
ments.
4

1.3 Specifications
Standard IEEE 802.3
IEEE 802.3u Class II Repeater
Network ports 16 dual-speed TP ports
with auto-sensing function
Port connectors 16 MDI-X RJ-45 shielded jacks
1 MDI-I RJ-45 shielded jack
Cascade connectors 2 DB25 connectors (KF-16M)
1 DB25 connector (KF-16MS)
LED indicators Power
10M Link status per port
100M Link status per port
Partition status per port
10M activity, 10M collision
100M activity, 100M collision
Environment Temperature 5oC to 40oC
Relative humidity 15% to 95% non-condensing
Dimension 440mm x 150mm x 44.4mm
(17.3 x 5.9 x 1.75 inch)
Power Internal universal power supply
100-240 VAC, 50/60Hz, 35W
5

2. Installing the Dual-speed Hub
The hub is designed to operate in workgroup environments without a
complicated configuration procedure. It also features an auto-select 100-
240V,50/60Hzpowersupplyunit,whichworksinmostcountriesaround
the world.
Before connecting the supplied power cord into the hub, check to see
that the cord voltage and current rating conform to the standards of the
country of operation.
2.1 Packing List
The hub has the following components shipped with it:
• One hub unit
• One AC power cord
• One cascade cable
• 19-inch rack mount kit
• Installation guide
2.2 Mounting the Hub
Desktop Mounting
The hub can be placed on a desktop as a stand-alone unit. Allow enough
ventilation space between the hub and the objects around it.
Figure 2-1 Desktop Mounting
6

Rack Mounting
For mounting the hub into a 19-inch rack, a pair of mounting brackets is
included in the pack.
Figure 2-2 Install Rack Mount Brackets
Install the hub into a 19-inch rack as illustrated in the following figure:
Figure 2-3 Install the Hub into a 19-inch Rack
7

2.3 Front Panel and Rear Panel
Figure 2-4 Components on the Front and Rear Panel
8

• 1X - 16X RJ-45 Connectors
MDI-X jacks for Port #1 - Port #16 respectively
• 16I RJ-45 Connector
MDI-I jack for Port #16
• Diagnostic LED indicators
The indicators provide the operating status of the hub and the
network ports. The status includes power, activity status for 10M
segment, activity status for 100M segment, collision status for
10M segment, collision status for 100M segment, 10M link status
per port, 100M link status per port, partition status per port.
• Cascade Connectors
The connectors are used for cascading more than one hub as a hub
stack. The connectors are labeled IN and OUT respectively for
KF-16M. KF-16MS provides IN cascade connector only.
• AC Power Socket
This socket is used for plugging an AC power cord.
• AC Power Switch
This switch is used for turning the AC power to the hub unit on or
off.
9

2.4 Cascading Multiple Hubs
More than one hub can be cascaded together to be a hub stack using the
cascade cable supplied with the hub. Two cascade connectors are lo-
cated on the rear of the hub and labeled IN and OUT respectively for
KF-16M. For KF-16MS, only IN cascade connector is provided.
Before cascading hubs, make sure the power to the hubs is turned off.
Connect one end of the cascade cable to the IN connector of the first
hub and connect the other end to the OUT connector of the second hub
as shown in the following figure:
Figure 2-5 Cascading Two Hubs
10

When cascading more than two hubs, follow the IN-to-OUTdaisy-chain
rule as above to cascade all hubs sequentially. Up to four hubs can be
cascaded in a stack.
Figure 2-6 Cascading Four Hubs in One Stack
Only one KF-16MS is needed in one stack if a bridge is required to
connect the 10M network and the 100M network in a hub stack.
Figure 2-7 A Hub Stack Containing one KF-16MS
NOTE:
TO KEEP THE STACK FUNCTION WORKING, THE POWER
OF ALL HUBS IN A STACK MUST BE ON DURING OPERA-
TION.
11

3. Making Network Connections
3.1 Dual-speed Twisted-pair Ports
Figure 3-1 16 Dual-speed TP Ports
The hub provides 16 dual-speed TP ports. Each can support one con-
nection to either a 10BASE-T Ethernet device or a 100BASE-TX Fast
Ethernet device using 2-pair UTP cable.
RJ-45 Connectors
Each of Port #1 to Port #15 provides one RJ-45 connector, which are
implemented as MDI-X jack. An MDI-X jack is designed with internal
crossover function. The function allows a connection to a computer us-
ing straight-through UTP cable. The Port #16 provides one MDI-X RJ-
45 connector and one MDI-I RJ-45 connector. Only one connector can
be used at the same time.
The pin definitions for MDI-X jack and MDI-I jack are as follows:
PIN# MDI-X Jack MDI-I Jack
1 Rx+ Tx+
2 Rx- Tx-
3 Tx+ Rx+
6 Tx- Rx-
4,5,7,8 NC NC
12

UTP Cables
For connecting to an 10BASE-T Ethernet device, a 2-pair Category 3,
4, or 5 UTP cable can be used. For connecting to a 100BASE-TX Fast
Ethernet device, only 2-pair Category 5 UTP cable can be used.
Connected Device UTP Cable Used
10BASE-T devices Category 3, 4 or 5
100BASE-TX devices Category 5 only
With different wiring, two types of the UTP cables are defined as fol-
lows:
Figure 3-2 Straight-through UTP and Crossover UTP
13

Connecting to a Computer
The RJ-45 connectors labeled 1X to 16X can be used for connecting to
the network adapter installed in a computer. The network adapter can be
a 10BASE-T adapter, a 100BASE-TX adapter, or a dual-speed NWay
adapter. The following figure illustrates the cables used for connecting
to different network adapters:
Figure 3-3 Connecting to Computers
Connecting to 10BASE-T Hubs
The hub can support more than one connection to the 10BASE-T hub.
Make sure the MDI-X to MDI-I connection rule is followed when con-
necting to a 10BASE-T hub using a straight-through UTP cable. The
following figure shows an example for the connections:
Figure 3-4 Connecting to 10BASE-T Hubs
14