GarrettCom Magnum TF14, Magnum TB14, Magnum TF14s, Magnum TF14-LP Installation And User Manual

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Corporate Headquarters

GarrettCom, Inc.

47823 Westinghouse Drive
Fremont, CA 94539

Phone [phone]

Fax [phone]
Website: http://www.GarrettCom.com

email [e-mail]

Magnum TF14 and TB14

10Mb/s Media Converters

Installation and User Guide

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Magnum TF14 and TB14 10Mb/s Media Converters

Installation and User Guide

Part #: 84-00121 Rev. C (04/01)

Trademarks

Ethernet is a trademark of Xerox Corpor at ion
NEBS is a trademark of Telcordia Technologies
UL is a registered trademark of Underwriters Laboratories

GarrettCom, Magnum

and

Personal Switch

are trademarks and

Personal Hub

is a

registered trademark of GarrettCom, Inc.

Important:

The Magnum TF14/TB14 10 Mb/s Media Converters contains no
user serviceable parts. Attempted service by unautho r ized personnel shall
render all warranties null and void. If problems are experienced with Magnum
TF14/TB14 10 Mb/s Media Converters products, consult Section 5,
Troubleshooting, of this User Guide.

Copyright  2001 GarrettCom, Inc. All rights reserved. No part
of this publication may be reproduced without prior written permission from
GarrettCom, Inc. Printed in the United States of America.

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Federal Communications Commission

Radio Frequency Interference Statement

This equipment generates, uses and can radiate frequency energy and if not

installed and used properly, that is in strict accordance with the manufacturer's
instructions, may cause interference to radio communication. It has been tested and
found to comply with the limits for a Class A computing device in accordance with the
specifications in Subpart J of Part 15 of FCC rules, which are designed to provide
reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause
interference, in which case the user at his own expense will be required to take whatever
measures may be required to correct the interference.

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Contacting GarrettCom, Inc

Please use the mailing address, phone and fax numbers and email address listed below:

GarrettCom, Inc.

47823 Westinghouse Drive

Fremont, CA 94539

Phone [phone]

Fax [phone]

Website: http://www.GarrettCom.com

email [e-mail]

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TABLE OF CONTENTS Page

1.0 SPECIFICATIONS .................................................................................................1

1.1. Technical Specifications............................................................................... 1

1.2. Summary of models and descriptions ............................................................7

2.0 INTRODUCTION...................................................................................................8

2.1 Inspecting the Package and the Product..........................................................8

2.2 Product Description .......................................................................................9

2.3 Features and Benefits ...................................................................................13

2.4 Applications for TF14 (fiber-series) and TB14 (BNC)................................. 15

2.5 Full-duplex twisted-pair to fiber applications ............................................18

2.6 Link Pass-through option, applications for the TF14-LP..............................18

3.0 INSTALLATION ..................................................................................................21

3.1 Locating the Media Converter Unit............................................................21

3.2 TF14-series (fiber units) Power Supply Installation .....................................24

3.3 TB14 (BNC) Power Supply Installation....................................................... 24

3.4 Rack Mount Tray option for TF14’s and TB14’s ........................................26

3.5 Calculating Overall Segment Distances........................................................28

3.6 Connecting Ethernet Media..........................................................................31

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TABLE OF CONTENTS (CONTINUED) ..........................................Page

3.6.1 Connecting Twisted Pair (RJ-45, standard and Link Pass-through) .31

3.6.2 Connecting Fiber ST, multi-mode & sgl.mode, full/half duplex......33

3.6.3 Power budget calculations for fiber media........................................34

3.6.4 Connecting ThinNet 10BASE2 (BNC) ...........................................35

4.0 OPERATION ........................................................................................................36

4.1 Power Requirements, Power Supply Types for TF14’s vs. TB14’s..............36

4.2 Front Panel LEDs - Magnum TF14, TF14s, TF14-LP (fiber)................... 36

4.3 Front Panel LEDs - Magnum TB14 (BNC).............................................. 37

4.4 BNC port, Internal Termination Switch……………………………………38

4.5 Up-Link (Cross-over) Switch on RJ-45 port...............................................39

4.6 Full- and half-duplex transparent mode, fiber models ................................39

5.0 TROUBLESHOOTING.........................................................................................4 0

5.1 Before Calling for Assistance ....................................................................... 40

5.2 When Calling for Assistance.........................................................................42

5.3 Return Material Authorization (RMA) Procedure ....................................... 43

5.4 Shipping and Packaging Information............................................................ 45

Appendix A: Warranty Information.................................................................................46

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Revisions

Rev C 04/01 :

Change the company name to GarrettCom, Inc. (Formerly it was
Garrett Communications). There are no changes to the content of the material at
this time

Rev B 02/00 :

The power budged calculations for the fiber media were changed.

Rev A 02/99 :

This revision is the initial release of the 4K8 Switches user

manual.

GarrettCom, Inc. reserves the right to change specifications, performance characteristics and/or
model offerings without notice.

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1.0 SPECIFICATIONS

1.1. Technical Specs - fiber full/half Models: TF14,

(TP to multi-mode fiber),

TF14s

(TP to single-mode fiber),

and TF14-LP

(multi-mode fiber with link-

pass), and standard “BNC Collision-indicating”

Model TB14

Performance:

Data Rate: 10 Mbps (IEEE 802.3)

Network Standards:

Ethernet V1.0/2.0 IEEE 802.3: 10BASE2, 10BASE-T, 10BASE-FL
(Magnum Media Converters are physical layer standard Ethernet products,

and operate independently of all software.)

Number of Media Converters in series:

Experience shows that up to three units can be used in series between repeaters.
For 4 or more in series, noise build-up will typically preclude proper operation.

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Maximum Standard Ethernet S e gment Lengths:

10BASE-T (twisted pair): 100 m (328 ft)
10BASE2 ThinNet (BNC): 185 m (607 ft)
FOIRL Fiber optic: 1.0 km (3,281 ft)
10BASE-FL Fiber optic : 2.0 km (6,562 ft)
10BASE-FL Single-mode Fiber optic: 10.0 km (32,810ft)

(for single-mode, use full-duplex operation for distances over approx. 4Km.)

Note: Magnum Media Converters

DO NOT

support full length Ethernet
segments. See Section 3.2 of this manual for media lengths and segment
distance calculations.

Operating Environment:

Ambient Temperature: 32ºF to 104ºF (0ºC to 40ºC)
Storage Temperature: -20ºC to 60ºC
Ambient Relative Humidity: 10% to 95% (non-condensing)

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Power Supply (External):

Power Input: 95 - 125 vac at 60 Hz for “-d” U.S. and Canadian models,

200 - 250 vac at 50 Hz for “-i” international models

Power Consumption: 2 watts typical and 3 watts max. for TF14 (fiber),

4 watts typical and 6 watts max. for the TB14 (BNC) Media Converter

Connectors:

RJ-45 Port: Modular 8-Pin female, with “cross-over” up-link switch
Fiber Port: Fiber optic (standard ST type)
BNC Port: Standard BNC connector, RG-58 ThinNet with internal term sw.

Fiber, Full- and half-duplex:

TF14 Fiber models operate in the full- or half-duplex transparent mode. They do
not detect and do not indicate collisions, even when the traffic is half-duplex.

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Packaging:

Enclosure: High strength sheet metal.
Dimensions, Media Converter unit:

TF14, TF14s, TF14-LP:

2.1”x 3.0”x 0.8” (5.3 cm x 7.6 cm x 2.0 cm)

TB14:

2.1 in x 3.0 in x 0.8 in (5.3 cm x 7.6cm x 2.0 cm)

Dimensions, Power Supply units:

TF14, TF14s, TF14-LP:

1.7 in x 2.2 in x 1.5 in (4.3 cm x 5.5 cm x 3.8 cm)

TB14:

2.0 in x 2.0 in x 1.5 in (5.1 cm x 5.1 cm x 3.8 cm)

Weight:

TF14, TF14s, TF14-LP:

4.6oz. (131g); power supply 5.75 oz (164g)

TB14:

4.6 oz. (131g); power supply 10 oz (285g)

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Media Converter LED Indicators:

LED TF14

TF14s, TF14-LP TB14 Description
PWR unit unit unit Indicates unit is receiving DC power.
Link TP, Fiber TP, Fiber * TP Steady ON when proper link is

established at both ends of the segment.*
RX TP, Fiber TP, Fiber TP, BNC Indicates port is receiving packets.
POL n.a. n.a. TP. Indicates the unit has detected a TP receive

wire-pair signal inversion (polarity).

COL* n.a. n.a. TP, BNC Indicates unit is simultaneously transmitting

and receiving data from the cables.

JAB* n.a. n.a. unit Indicates jabber (illegal packet length fault)

condition. Segment is partitioned when lit.

* for TF14-LP Link Pass-through, either both LEDs are lit or neither is lit. See Section 2.6

NOTE:

*COL and JAB LEDs, only on TB14 units, are indicators applicable to standard
collision domains with only half-duplex operation.

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Agency Approvals:

115v 60 Hz Power Supply is UL Listed (UL 1950 and cUL) and CE.

230v 50 Hz Power Supply is same.

Emissions: Meets FCC Part 15 Class A, CE

Warranty:

Three years, return to factory Made in USA

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1.2 Summary of models and descriptions:

FIBER:
Magnum TF-14-d = TP to fiber, transparent hdx/fdx, ST connector, multi-mode, 115V 60Hz AC
Magnum TF-14-i = TP to fiber, transparent hdx/fdx, ST connector, multi-mode, 230V 50Hz AC
Magnum TF-14s-d = TP to fiber, transparent hdx/fdx, ST connector, single-mode, 115V 60Hz AC
Magnum TF-14s-i = TP to fiber, transparent hdx/fdx, ST connector, single-mode, 230V 50Hz AC

Magnum TF-14LP-d = TP to fiber, transparent hdx/fdx, ST, multi-mode, Link Pass-through, 115V

60Hz AC

Magnum TF-14LP-i = TP to fiber, transparent hdx/fdx, ST, multi-mode, Link Pass-through , 230V

50Hz AC

BNC:

Magnum TB-14-d = TP to BNC, half-duplex, 115V 60Hz AC power supply
Magnum TB-14-i = TP to BNC, half-duplex, 230V 50Hz AC power supply

MC14-TRAY = 19” Rack-mount tray for 14-series Media Converters, up to 16 units

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2.0 INTRODUCTION

This section describes the TF14, TF14s, TF14-LP, and TB14 models,

including appearance, features and typical applications.

2.1 Inspecting the Package and the Product

Examine the shipping container for obvious damage prior to installing this
product; notify the carrier of any damage which you believe occurred during shipment or
delivery. Inspect the contents of this package for any signs of damage and ensure that the
items listed below are included.

This package should contain:

1 Magnum TF14 or TB14 Media Converter Unit

1 External Power Supply, either 115 vac 60 Hz or 230 vac 50 Hz

1 set Metal mounting clips and screws, 2 each

1Velcro Tape section, approximately 3 inches in length

1 User Guide, i.e., this manual

(continued next page)

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Remove the Magnum Media Converter from the shipping container. Be sure to

keep the shipping container should you need to ship the unit at a later date.

In the event there are items missing or damaged contact your supplier. If you need
to return the unit use the original shipping container. Refer to Section 5,
Troubleshooting, for specific return procedures.

2.2

Product Description

Magnum TF14 and TB14 10Mb Media Converters offer a compact, cost-effective
way to adapt to non-RJ-45 Ethernet cabling as network requirements change and grow.
The design provides units that are very small, power-efficient, but also full-function.

The “14” series offer a graceful way to convert and transmit data among twisted
pair, fiber and thin coaxial network cabling environments. A variety of twisted-pair-to­fiber models provide for multi-mode or single-mode, transparent full- and half-duplex
mode, and normal or Link Pass-through operation. Magnum TF14 and TB14 Media
Converters cost significantly less than full repeaters and can be used whenever media
distance limitations will not be exceeded in the segment. All units are compatible with
Ethernet V 1.0 / 2.0 specifications and comply with IEEE 802.3 standards.

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Magnum TF14 and TB14 10Mb Media Converters are designed for quick and
easy installation even in very tight spaces. Media cables are easily attached to the
corresponding Media Converter. Because of their compact size, Magnum Media
Converters can be Velcro®-mounted on an office wall or the side of a desk or cabinet. A
rack-mount tray that neatly holds the units and associated power supplies is available.

The standard “1-per-unit” external power supply plugs into a nearby AC wall
socket or power strip. Each converter features a full set of LEDs that convey essential
diagnostic and status information. See Section 4.1, for LED function specifications.

Magnum Media Converters are designed to provide low-temperature operation
over an extended period to make them some of the most reliable in the industry. Their
high-strength fabricated steel packaging shields against Radio Frequency Interference
(RFI) and Electromagnetic Interference (EMI).

Magnum TF14 and TB14 10Mb Media Converters are specifically designed to
convert data signaling to allow transmission between two different Ethernet cabling
types, allowing migration to a new media type while preserving segments of the pre­existing wiring structure. In addition, the TF14 allows fiber segments to be used with
new RJ-45 Ethernet hubs and switches that have insufficient (or none at all) fiber ports.

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All of the Magnum “14” Media Converters comply with the IEEE 802.3
10BASE-T specification for 10 Mb/sec traffic via shielded (STP) or unshielded twisted
pair (UTP) segments. They feature an up-link or cross-over switch to eliminate the need
for a special cross-over cable when connecting to a hub or concentrator.

Note: experience shows that the maximum number of 10Mb Media Converters
that can be used in series is three. The cumulative signal noise from 4 or more units
together in series may cause packet alignment errors.

Fiber models:

The Magnum TF14 (multi-mode ST), TF14s (single-mode ST), and
TF14-LP (Link Pass-through, ST) are equipped with one fiber-ST and one twisted pair
RJ-45 connector for use in IEEE FOIRL or 10BASE-FL compliant networks. The up-link

9VDC .3AMP

Link

RX

TX

RX

Link

Pwr

RX

TWISTED PAIR

FIBER

UP LINK

(

10BASE-T

)

Fiber optic - ST Connector

(

10BASE-FL and FOIRL

)

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(or crossover) switch on the RJ-45 port simplifies cable installation and connection.

All fiber models operate in transparent full- or half-duplex mode, supporting
matched sets of either mode type, i.e., attached devices are either both full-duplex or both
half-duplex.

BNC model:

The
Magnum TB14 is
equipped with one
BNC and one RJ-45
port. The BNC port
has an internal
termination switch, allowing BNC attachment without a “T” connector. The BNC
connector complies with IEEE 802.3 10BASE2 specifications.

ThinNet-BNC

(10BASE-2)

Twisted Pair
(10BASE-T)

Pol

GARRETT

Magnum TB14

Media Converter

Col

RX

Col

RX

Pol

Link

Pwr

Jab

TWISTED PAIR

COAX

UP LINK

INT

EXT

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2.3 Features and Benefits

!!!!

Reduces Network Costs

Magnum Media Converters offer the ideal solution to quickly and
inexpensively connect Twisted Pair with Fiber or ThinNet media within
an expanding Ethernet network where full repeaters are not required.

!!!!

No added Repeater Hop Count

Media Converters do not add signal timing delays associated with full
repeaters, and can be installed without increasing the repeater hop count
of an existing network.

!!!!

Fiber / twisted-pair models for all fiber modes

A variety of twisted-pair-to-fiber models provide for multi-mode or single­mode fiber, transparent full- or half-duplex mode, ST connectors, and
normal or Link Pass-through operation.

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!!!!

Small, Compact, Rugged Design

Featuring a compact steel case with an external power supply, Magnum
TF14 and TB14 Media Converters can be conveniently installed in
minimal space in rack cabinets, on table-tops or wall-mounted.

!!!!

Full Complement of LEDs.

Each model is equipped with a full complement of LEDs (7 for TF14, 11
for TB14) to provide network traffic status and basic diagnostic
information without additional network diagnostic equipment.

!!!!

Highly Reliable and Dependable

Magnum Media Converters are based on a robust design and are packaged
in a metal enclosures to ensure high reliability and durability.

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2.4

Applications

The primary function of a 10Mb Ethernet Media Converter is to permit two
different 10Mb media types to coexist inexpensively within the same network by
allowing data to be transmitted and received between different media types.

Magnum “14” Media Converters are typically used where new 10BASE-T
networking equipment is being installed and connected to new / existing fiber or BNC
Ethernet cabling. Alternatively, two twisted-pair-to-fiber models (typically TF14 for
multi-mode and TF14s for single-mode) are convenient for inserting a fiber segment,
either full- or half-duplex, into a twisted pair environment in order to connect to a remote
workstation, hub or switch via fiber cabling, without increasing the repeater hop count.

The TF14-LP, with the Link Pass-through feature, is often desired for managed
networks, where the LINK indication passes-through from the fiber side to the TP side.
See Section 2.6 below for additional details.

Magnum “14” Media Converters have an external power supply, enabling them
to be used to convert signals among media that does not have a power source as part of
the cabling system, such as twisted pair, BNC and Fiber. (AUI ports can supply power).

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Magnum TF14: Connecting a 10Mbps fiber cable and a 10BASE-T network.

1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24

10BASE-T

wiring segment

Pwr

Central network
with 10Mb/s
fiber backbone

GARRETT

UP LINK

TX

RX

9VDC .3AMP

Magnum TF14
Media Converter

Link

RX

RX

Link

Pwr

TWISTED PAIR

FIBER

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The TB14 10Mb Ethernet Media Converter connects twisted­pair cabling to existing BNC cabling. The operation is half-duplex in all
situations. See Section 3.5 for calculations of cable distance limits.

Existing ThinNet (10BASE2) backbone

1

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

10BASE-T

wiring segment

GARRETT

12 VDC 1 AMP

Magnum TB 14

Media Converter

Col

RX

Col

RX

Pol

Link

Pwr

Jab

TWISTED PAIR

COAX

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2.5 F ull / half-duplex applications.

Of the various 10Mb media types, only the twisted-pair to fiber combination is

capable of full-duplex (i.e., simultaneously transmitting and receiving on the same cable
segment) operation. Full-duplex is rarely required at 10Mb, but might occasionally be
desired to connect a 10Mb RJ-45 Switching Hub port over a fiber link to a full-duplex
RJ-45 NIC in a remote server, or to connect one port of a full-duplex Switching Hub via
fiber to another full-duplex 10Mb RJ-45 Switching Hub port.

All the TF14-series operate in transparent half-and full-duplex mode. For half-

duplex traffic, the TF14-series work correctly but do not detect or indicate collisions.

2.6 Link Pass-through applications.

In managed networks, the LINK signal on a managed switch (or hub) port is

used as an indicator that the attached cable segment is installed and operab le. The
network manager, using the SNMP agent, can troubleshoot the cabling by examining the
LINK status on each port. This works fin e as long as all of the cabling is twisted pair.

When a twisted-pair to fiber media converter is introduced, the standard models

of these products (such as the Magnum TF14) treat each attached cable segment as a
separate entity. The LEDs on the media converter separately indicate LINK on each port,

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enabling an installer to see t he LINK (or no-LINK) status of each port and each piece of
cable independently. This is ideal for the installer. But it introduces a discontinuity for
the managed network software which wants to “see through” the media converter and
wants to treat it as part of the cable attached to a particular port.

The Link-Pass-through model, TF14-LP, provides the LINK “see-through”
feature desired for managed networks. On these models, either both LINK LEDs are lit
or neither is lit. And, the TF14-LP operates in transparent half- and full-duplex mode.

The following diagram illustrates the standard condition, no Link Pass-through.

This diagram illustrates the Link Pass-through feature.

GARRETT

9VDC .3AMP

Magnum TF14
Media Converter

Link

RX

TX

RX

Link

Pwr

RX

TWISTED PAIR

FIBER

UP LINK

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 7 18 19 20

21 22 23 24

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 7 18 19 20 21 22 23 24

Fiber

Twiste d Pair

Two LINK LED’s, one
for each Cable Segment

LIN K Segm e n t-2

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Note that two TF14 media converters in series could be used to go from an RJ­45 port, through a fiber segment, and into another RJ-45 port. Where both media
converters are TF14-LP with Link Pass-through, the LINK on each RJ-45 port can “see
through” both of the TF14-LP Media Converters to the other RJ-45 port.

Pol

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Fiber

Twisted Pair

Two LINK LED’s, both
ON or both OFF

GARRETT

9VDC .3AMP

Magnum TF14

Media Converter

Link

RX

TX

RX

Link

Pwr

RX

TWISTED PAIR

FIBER

UP LINK

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3.0 INSTALLATION

This section describes the installation of the Magnum TF14 and TB14 Media
Converters, including location, segment distance calculation and media connection.

3.1 Locati ng the Media Converter Unit

The compact and lightweight design of the Magnum Media Converter allows it
to be easily installed in almost any location. A Velcro strip is included for mounting the
unit on a vertical surface such as a wall
or cabinet, or for securing the unit on a
table-top or shelf. Alternatively, metal
mounting clips and screws are included
for a rugged and secure mounting in any
orientation.

Installation of the Magnum
TF14 and TB14 Media Converters is
a simple procedure.

Secure attachment of mounting

clips for wall mounting

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Locating the Me dia Converter Unit (continued)

First, locate an AC receptacle that is within six feet (2 meters) of the intended unit
location and plug in the external power supply unit (provided as part of the unit).
The small DC power cord from the power supply plugs into the matching “RJ-45
end” power jack of the “14” Media Converter unit, and when power is applied the
green PWR LED will illuminate.

Second, make sure the unit is installed in a location where convection
cooling is not inhibited.

Pol

GARRETT

9VDC .3AMP

Magnum TF14

Media Converter

Link

RX

TX

RX

Link

Pwr

RX

TWISTED PAIR

FIBER

UP LINK

External

Power Supply

Power Jack

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TB14 END VIEW

BNC PORT

TERMINATOR
SWITCH

UPLINK
SWITCH

RJ-45
PORT

9V POWER
SUPPLY

FIBER ST
PORT

TF14 END VIEW

TB14 END VIEW

UPLINK
SWITCH

RJ-45
PORT

12V POWER
SUPPLY

TF14 END VIEW

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3.2 TF14-series (fiber units) Power Supply, Installation

The TF14-series external power supply unit supplied is one of two types; one
version for AC input power of 115 vac 60 Hz, and one version for 230 vac 50 Hz.
Examine the power supply to make sure the version you have is the right type for your
AC power system. The 115 vac version has a small transformer integral with a
convenience power outlet plug, and a lightweight DC power cord to the applicable power
jack on the hub. The 230 vac version has a small transformer integral with an IEC-type
power plug for a user-supplied AC power cord with a convenience power outlet plug. It
also includes a lightweight DC power cord to the power jack on the TF14. unit. Both
power supply models supply 9 volt (at 2 watts typical) of DC power to the TF14 Media
Converter.

3.3 TB14 (BNC units) Powe r Supply, Installation

The TB14 external power supply unit supplied is one of two types; one version
for AC input power of 115 vac 60 Hz, and one version for 230 vac 50 Hz. Examine the
power supply to make sure the version you have is the right type for your AC power
system. The 115 vac version has a small transformer integral with a convenience power

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outlet plug, and a lightweight DC power cord to the applicable power jack on the media
converter. The 230 vac version has a small transformer integral with an IEC-type power
plug for a user-supplied AC power cord with a convenience power outlet plug. It also
includes a lightweight DC power cord to the power jack on the TF14. unit. Both power
supply models supply 12 volt (at 4 watts typical) of DC power to the TB14 Media
Converter.

See also Section 4.1 for additional specification details on power supplies for
“14”-series Media Converters

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3.4 MC14-TRAY for Rack Mounting of TF14 and TB14 Media Converters

For 19” rack-mounting of Magnum 14 series Media Converters, a rack-mount
tray is available, MC14-TRAY. The Media Converter units are mounted with their RJ-45
port and DC power jack in the back, with either fiber or BNC cable in the front. Any mix
of the “14”-series Media Converters may be placed on a tray, up to a maximum

of 16 units. (The mounting spaces of the MC14-TRAY are specific to the “14”-series,
and do not permit other models of other sizes to be put in the tray).

MOUNTING

SCREW

DC POWER

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A typical installation of the model MC14-TRAY, 19” rack-mount tray will
hold a few (often three to eight) 14-series Media Converters, with their power supplies
plugged into power strips (not included) in the rear area of the tray. Metal mounting
screws in the bottom-front hold the Media Converters firmly in place.

The beveled-top edge of the units permits the LEDs of each unit to be viewed
for operational status, even when the units are very close together.

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3.5 Calculating Overall Segment Distance

Important Note:

Special consideration must be given to maximum cable
segment lengths on each side of a Magnum TF14 and TB14 Media Converter. It is
recommended that IEEE 802.3 specifications for overall maximum segment distances be
adhered to in order to maintain optimum network performance. (See also Technical
Specs, Maximum Standard Ethernet Segment Distances, Section 1.1 of this manual.)

When installing the Magnum 14-series Media Converter, it is important to
consider the combined overall segment length of both of the attached media types. The
overall segment length is calculated by adding together the segment lengths on both sides
of the Magnum Media Converters. Cable segment length on each side of the Media
Converter is measured as a percentage of the maximum allowable standard media
distance for the given media type. The percentages, when added together, must not
exceed 100%.

Media Distance For mula for Magnum Media Converters:

X% + Y% < 100%

Where X = The segment distance on one side of the Magnum Media Converter
divided by the Standard Maximum Media Distance for that media type, x 100%.

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Where Y = The segment length on the other side of the Magnum Media Converter
divided by the Standard Maximum Media Distance for that media cabling type, x 100%

Notes:

1) Media distance calculation is the same for both half and full duplex media
converters. 2) Single-mode fiber distances more than about 4Km will exceed the 10Mb
collision domain limits, and should be operated at either full-duplex or with light traffic.

Pol

GARRETT

Magnum TB14

Media Converter

Col

RX

Col

RX

Pol

Link

Pwr

Jab

TWISTED PAIR

COAX

UP LINK

INT

EXT

Segment Y

55m (165 ft)

ThinNet-BNC

(10BASE-2)

Twisted Pair
(10BASE-T)

Segment X
72m (216 ft)

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A Distance Calculation Example:

Connectivity between ThinNet and TP Ethernet Medi a.

In the figure shown above, the length of Segment X is 72m (216 ft). This is
39% of the maximum allowable distance for 10BASE2 media (185 m) [72/185 x 100% =
39%]. The length of Segment Y is 55m (165 ft). This is 55% of the maximum allowable
distance for UTP 10BASE-T media (100 m) [55/100 x 100% = 55%]. The total of the
two percentages (39% + 55%) is 94%, which is allowable.

Note 1

:

Where more than one media converter is used in one
segment run, the percentages for all of the cabling lengths in the run
must be added together and must not exceed 100%.

Note 2

:

If the total segment distance calculation result is greater than
100%, consider using a Magnum Repeater so that each cable type can
be 100% of its maximum allowed length.

Note 3

: The maximum number of 10Mb Media Converters that can
be used in series is three. The cumulative noise from four or more
units together causes packet alignment errors.

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3.6 Conne cting Ethernet Media

Connecting Ethernet media to the Magnum Media Converter is very simple and

straightforward. Using a properly terminated media segment, simply attach t he cable end
to the appropriate connector.

See Sections 4.2 - 4.3 for details of the LEDs on the media converter models.

3.6.1 Connecting Twisted Pair (RJ-45 ports)

The following procedure describes how to connect a 10BASE-T twisted pair

segment to the RJ-45 port on the Magnum Media Converters. The procedure is the same
for both unshielded and shielded twisted pair segments.

1. Using standard 10BASE-T media, insert either end of the cable with an RJ-45
plug into the RJ-45 connector of the Magnum Media Converter.

2. Connect the other end of the cable to the corresponding device.

3. Use the LINK LED (non-Link pass-through models) to ensure proper
connectivity by noting that the LED will be illuminated when the units are
powered and proper connections established. If the LINK LED is not illuminated,
change the setting of the up-link switch (See Section 4.4 for up-link switch

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information.) If this does not help, ensure that the cable is connected properly at
both ends and is not defective.

4. For the TF14-LP model with the Link-Pass-through feature, The two LINK LEDs
operate together, and either both LEDs are lit or neither is lit. Both of the
attached cables must be operable for LINK to be indicated. Absence of LINK
does not point to the problem cable segment, and the fault may be in either.

3.6.2 Connecting Fiber Optic mul ti-mode, single mode (half- and full-duplex)

The following procedure applies to 10BASE-FL multi-mode and single mode

applications using the TF14, TF14s, TF14SC, and TF14-LP Media Converters. All have
ST-type fiber connectors, except the TF14SC which has SC-type connectors. The
TF14s single-mode differs from the other fiber media converters in terms of the
maximum distance allowed. The others are used for a multi-mode fiber segment lengths
of up to 2km. The TF14s is used for single-mode fiber segments of up to 10km in length.
The following table (continued next page) is provided for general information:

Fiber Cable Type cable diameter

* Max. length Wavelength

Multi-mode fiber 50/125, 62.5/125. 2km 850 nm

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Fiber Cable Type cable diameter * Max. length Wavelength
Single-mode fiber 2/15 - 8/60 10km 1300 nm

* xx/yy are the diameters of the core and the core plus cladding respectively
The values shown are typical values

Procedure for connecting multi-mode and single-mode fiber cables:

1.

Before connecting the fiber cable, remove the protective dust caps from the tips of the
connectors on the media converter. Save these dust caps for future use.

2. Wipe clean the ends of the dual connectors with a soft cloth or lint-free lens tissue
dampened in alcohol. Make certain the connectors are clean before connecting.

Note: One strand of the duplex fiber optic cable is coded using color bands
at regular intervals; you must use the color-coded strand on the associated
ports at each end of the fiber optic segment.

3. Connect the Transmit (TX) port (light colored post) on the Magnum Media Converter to the
Receive (RX) port of the remote device. Begin with the color-coded strand of the cable for
this first TX-to-RX connect ion.

4. Connect the Receive (RX) port (dark-colored post) on the product to the Transmit
(TX) port of the remote device. Use the non-color coded fiber strand for this.

5.

The LINK LED corresponding to the fiber port on the front of the product will illuminate
(for standard non-Link-Pass-through models) when a proper connection has been
established at both ends (and when power is ON in the units at each end). If LINK is not lit

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after cable connection, the normal cause is improper cable polarity. Swap the fiber cables
on the product connector to remedy this situation.

6.

For the Link Pass-through model, connection is the same except that the LINK indication
will not be present unless LINK is made for the cables on both sides.

3.6.3 Power Budget Calculations for Fiber Media Magnum TF14

Receiver Sensitivity and Transmitter Power are the parameters necessary to
compute the power budget. To calculate the power budget of different fiber media
installations, the following equations should be used:
OPB (Optical Power Budget) = PT(min) - PR(min)
where P

T

= Transmitter Output Power, and PR = Receiver Sensitivity

Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss)
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]

where the “Cable Loss” for 62.5/125 and 50/125

µ

m

(M.m) is 2.8 dB/km,
and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,
and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km

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The following data has been collected from component manufacturer’s (HP’s and
Siemens’) web sites and catalogs to provide guidance to network designers and installers.

Fiber

Port

Module

Speed,

Std.

Mode

Std. km

fdx

(hdx)

Wave

-

length

nm

Cable

Size

µµµµ

m

X’mitr

Output

P

T

,

dB

R’cvr

Sens.

P

R

,

dB

Worst
OPB,

dB

Worst*
distance
Km, fdx

typical

OPB,

dB

typical*
distance
Km, fdx

FPM10-

MST, MSC

10 Mb

FL

Multi-

mode2(2)

850

62.5/125
100/140

50/125

-15.0

-9.5

-19.5

-31

-31

-31

14

19.5

9.5

5

5.9

3.4

17

23.5

13.5

6
7

4.8

FPM10-

SST, SSC

10 Mb

FL

Single-

mode10(5)

1300 9/125 -30 -39 7 14 13 26

3.6.4 Connecting ThinNet 10BASE2

Connect the ThinNet coax cable to the BNC connector on the TB14 Media
Converter in the same manner as is done for any standard BNC connection. Be sure that
the BNC segment is properly terminated using a standard “T” connector and terminator.

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4.0 OPERATION

This section describes the operation of the Magnum TF14 and TB14 10Mb
Media Converters, including power supply requirements, up-link switch functionality,
and a description of all LEDs.

4.1 P ower Requirements, Power Supply T ypes for TF14 vs. TB14

Magnum TF14 Media Converters are very power-efficient. They only require
about 2 watts of power and are designed to be used with a tiny external 9-volt power
supply.

This power supply is different from other power supplies used with any

other Magnum produc ts, including even the companion TB14 unit.

Magnum TB14 Media Converters require 12v internal for the BNC port..
They typically use about 5 watts of power and are designed to be used with an external
12-volt power supply.

This power supply is the same as the power supplies used
with several other Magnum products, including 10Mb Magnum Perso nal Hubs
and the TF14 and TB14 models of 10Mb Magnum Med ia Converters.

4.2 Front Panel LEDs - Magnum TF14, TF14s, and TF14-LP fibe r model s

LED Description

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PWR

Illuminates GREEN to indicate the unit is receiving DC power.

LINK

(per port) Illuminates to indicate proper connectivity on each cable
segment (non-Link Pass-through models). LINK will turn off in
the event connectivity is lost between the ends of each cable
segment or a loss of power occurs in the unit or in the attached
device. For Link Pass-through models, see Section 3.3.3 #6.

RX

(per port) Illuminates GREEN to indicate data is being received.

4.3 Front Panel LEDs - - Magnum TB14
LED Description

PWR

Illuminates GREEN to indicate the unit is receiving DC power.

LINK

(TP) Illuminates GREEN, to indicate proper connectivity on the
10BASE-T network segment. LINK will turn off in the event connectivity is
lost between the ends of the twisted pair segment or a loss of power occurs in
the unit or remote device.

RX

(per port) Illuminates GREEN to indicate data is being received.

POL

(TP) Illuminates AMBER to indicate inverse polarity detected.

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JAB

Illuminates AMBER to indicate
jabber (illegal packet length).

COL

(per port) Illuminates AMBER
to indicate a collision on the segment.

4.4 TB14, BNC Internal Termination Switch

An internal termination switch is provided
on the TB14 Model only The BNC port is specially
equipped with an internal termination switch that
eliminates the need to use a "tee" connector when the
BNC cable is ending at the TB14. When the switch is in the “INT” position, the
connection is internally terminated. When switched to the “EXT” position, external
termination (using a “tee” connector, not supplied) is required. Some applications may
require a "tee" connector, used as a tap, to allow the 10BASE2 coax segment to continue
on past the TB14 port connection.

End view, BNC port

Internal
External

BNC PORT

TERMINATOR
SWITCH

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4.5 Up-Link (Cross-over) Switch

When set to the UP position (=), the Magnum

Media Converter is wired for normal twisted-pair connection
to a user node device. When set to the DOWN position (X),
the Media Converter is wired with cross-over functionality
for direct up-link to a network hub or concentrator. Switch
ports may be of either polarity, and this feature is most
convenient with switches.

4.6 F ull- and half-duplex transparent operation for fiber models

All the TF14-series operate in transparent half-and full-duplex mode. For half-

duplex traffic, the TF14-series work correctly but do not detect or indicate collisions.

See Section 2.5 for more details and applications information.

End view, TP port

Up-link

Switch

up-link (X)

user device (=)

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5.0 TROUBLESHOOTING

All Magnum Ethernet products are designed to provide reliability and

consistently high performance in all network environments. The installation of Magnum
TF14/TB14 10 Mb/s Media Converters is a straightforward procedure (see
INSTALLATION, Section 3.0); the operation is also straightforward and is discussed in
Section 4.

Should problems develop during installation or operation, this section is

intended to help locate, identify and correct these types of problems. Please follow the
suggestions listed below prior to contacting your supplier. However, if you are unsure of
the procedures described in this section or if the Magnum TF14/TB14 10 Mb/s Media
Converter is not performing as expected, do not attempt to repair the unit; instead contact
your supplier for assistance or contact GarrettCom Customer Support.

5.1 Before Calling for Assistance

1. If difficulty is encountered when installing or operating the unit, refer back to
the Installation Section of the applicable chapter of this manual. Also check
to make sure that the various components of the network are interoperable.

7. Check the cables and connectors to ensure that they have been properly
connected and the cables/wires have not been crimped or in some way

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impaired during installation. (About 90% of network downtime can be
attributed to wiring and connector problems.)

3. Make sure that an AC power cord is properly attached to each Magnum
TF14/TB14 10 Mb/s Media Converters unit. Be certain that each AC power
cord is plugged into a functioning electrical outlet. Use the PWR LEDs to
verify each unit is receiving power.

4. If the problem is isolated to a network device other than the Magnum
TF14/TB14 10 Mb/s Media Converters product, it is recommended that the
problem device is replaced with a known good device. Verify whether or not
the problem is corrected. If not, go to Step 5 below. If the problem is
corrected, the Magnum TF14/TB14 10 Mb/s Media Converters and its
associated cables are functioning properly.

5. If the problem continues after completing Step 4 above, contact your supplier
of the Magnum TF14/TB14 10 Mb/s Media Converters unit or if unknown,
contact GarrettCom, Inc.by fax, phone or email (

[e-mail]

) for

assistance.

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5.2 When Calling for Assistance

Please be prepared to provide the following information.

1. A complete description of the problem, including the following points:
a. The nature and duration of the problem;
b. Situations when the problem occurs;
c. The components involved in the problem;
d. Any particular application that, when used, appears to create the problem;

2. An accurate list of GarrettCom product model(s)involved, with serial
number(s). Include the date(s) that you purchased the products from your
supplier.

3. It is useful to include other network equipment models and related hardware,
including personal computers, workstations, terminals and printers; plus, the
various network media types being used.

4. A record of changes that have been made to your network configuration prior

to the o ccurrence of the problem. Any changes to system administration

procedures should all be noted in this record.

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5.3 Return Material Authorization (RMA) Procedure

All returns for repair must be accompanied by a Return Material

Authorization (RMA) number. To obtain an RMA number, call GarrettCom
Customer Service at [phone] during business hours in California or email to

[e-mail]

). When calling, please have the following information

readily available:

Name and phone number of your contact person.
Name of your company / institution
Your shipping address
Product name
Serial Number (or Invoice Number)
Packing List Number (or Sales Order Number)
Date of installation
Failure symptoms, including a full description of the problem.

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GarrettCom will carefully test and evaluate all returned products, will repair
products that are under warranty at no charge, and will return the warranty-repaired
units to the sender with shipping charges prepaid (see Warranty Information,
Appendix A, for complete details). However, if the problem or condition causing the
return cannot be duplicated by GarrettCom, the unit will be returned as:

No Problem Found.

GarrettCom reserves the right to charge for the testing of non-defective
units under warranty. Testing and repair of product that is not under warranty will
result in a customer (user) charge.

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5.4 S hipping and Packaging Information

Should you need to ship the unit back to GarrettCom, please follow these
instructions:

1. Package the unit carefully. It is recommended that you use the original
container if available. Units should be wrapped in a "bubble-wrap" plastic
sheet or bag for shipping protection. ( You may retain all connectors and this
Installation Guide.)

CAUTION

:

Do not pack the unit in Styrofoam "popcorn" type packing

material. This material may cause electro-static shock damage to the unit.

2. Clearly mark the Return Material Authorization (RMA) number on the

outside of the shipping container.

3. GarrettCom is not responsible for your return shipping charges.

4. Ship the package to:

GarrettCom, Inc.

47823 Westinghouse Drive

Fremont, CA 94539
Attn.: Customer Service

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APPENDIX A: WARRANTY INFORMATION

GarrettCom, Inc. warrants its products to be free from defects in materials
and workmanship for a period of three (3) years from the date of shipment by
GarrettCom.

During this warranty period, GarrettCom will repair or, at its option,
replace components in the products that prove to be defective at no charge other
than shipping and handling, provided that the product is returned pre-paid to
GarrettCom.

This warranty will not be effective if, in the opinion of GarrettCom, the
product has been damaged by misuse, misapplication, or as a result of service or
modification other than by GarrettCom.

GarrettCom reserves the right to make a charge for handling and
inspecting any product returned for warranty repair which turns out not to be
faulty.

Please complete the warranty card as this acts as a product registration,
and mail it to GarrettCom within two weeks of your purchase.