GarrettCom Magnum 8000X, Magnum 8000X-A Installation And User Manual

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Magnum 8000X

Mixed-Media Fiber Hubs

Installation and User Guide

Magnum 8000X Mixed-Media Fiber Hubs Installation and User Guide (05/02)

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Magnum 8000X

Mixed-Media Fiber Hubs

Installation and User Guide

Part #: 84-000122 (Rev C 04/02)

Trademarks

Ethernet is a trademark of Xerox Corporation

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 8000X Mixed-Media Fiber Hub contains no user

serviceable parts. Attem

pted service by unauthorized personnel shall render

all warranties null and void. If problems are experienced with Magnum

8000X Mixed-Media Fiber Hub products, consult Section 6,

Troubleshooting, of this User Guide.

Copyright  2002 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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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]

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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The Magnum Line

ETHERNET CONNECTIVITY PRODUCTS

"DESIGNED AND MANUFACTURED IN THE USA"

OVERVIEW

GarrettCom, Inc.offers the premium-quality Magnum line of Ethernet LAN
connectivity products with industry-standard functionality and built-in fiber
configurability. Magnum products are designed for use in demanding Carrier Class,
Industrial Grade and OEM applications where reliability is a primary consideration.

6K25 Managed Fiber Switches, Gigabit, 100 and 10 Mbps, fiber and copper ports,

mix-and match. Features SFF fiber for up to 25 fiber ports in a 1U unit.

4K-Series Switches, 100 and 10 Mbps, copper ports with optional fiber port, with

auto-negotiating full switching performance.

Quad-Series Fiber Switches, 100 & 10Mbps, fiber and copper ports, mixed-speed

and mixed-media types, full switching performance.

“Outdoor” Ethernet Switch, for temperature uncontrolled locations

6 10/100 and 2 100Mb fiber ports, can be connected in strings

Mixed-Media Fiber Hub, 16-port Stackable,10/100 auto-sensing

Dual Speed 8-port and 16-port Stackables, 10/100 auto-sensing

Stackable Hubs, SNMP Optional

10Mb series and 100Mb series, both w/ optional port modules

Personal Switches, 10/100Mb

8 port dual speed, Auto-negotiable with fiber option

Personal Hubs, 100Mb or 10/100Mb

8-port, with two switched ports (1 fiber built in)

Personal Hubs, 10Mb series

8-port + AUI, stackable to 5 high, + optional BNC of fiber port

8 or 9-port and 4 or 5-Port Personal Hubs, w/ man. up-link sw.

Media Converters, 10Mb and 100Mb series

All media combinations, incl. fiber ST, SC, mm., single mode

The “X-line” of configurable MiXed Media products:

Stackable Concentrators, SNMP optional, 13-Ports

Mini-Concentrators, 7 Ports, Repeaters, 2-Ports

Repeater Port Modules (RPMs), 6 types for Ethernet media

Bridge Port Modules (BPMs), 4 types, for segment isolation

Transceivers, 10Mb series Mini-Transceivers and Coax Models Apr, 02

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TABLE OF CONTENTS............................................................................................. PAGE

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

1.1 Specifications - Port Modules (PMs) for front ports

.................................... 3

1.2 Specifications - Switch Port Module (SPM) for bonus port

.......................... 3

1.3 Ordering Inform

ation......................................................................................4

2.0 I

NTRODUCTION - MAGNUM 8000X MIXED-MEDIA FIBER HUB .......................... ……5

2.1 Inspecting the Package and Product

................................................................ 5

2.2 General Inform

ation........................................................................................ 6

2.3 Product Description - Magnum

8000X Fiber Hub..........................................6

2.3.1 The Magnum 8000X Fiber Hub Chassis

............................................. 7

2.4 Port Modules (PMs)

....................................................................................... 8

2.5 Switch Port Modules (SPMs)........................................................................ 9

2.5.1 Magnum SPM-FDST

........................................................................ 12

2.5.2 Magnum SPM-FDSC

........................................................................ 13

2.5.3 Magnum SPM-FDSSC......................................................................

13

2.5.4 Magnum SPM-TTX ..........................................................................

14

2.5.5 Magnum SPM Specificatons Summary Table ................................. 14

2.6 10/100 Speed Auto-Sensing (front ports, copper only

)................................. 15

2.7 Stacking Magnum Mixed-Media 8000X ......................................................

15

2.8 Bridge module between 10/100Mbps dom

ain .............................................. 16

2.9 Feature & Benefits

........................................................................................ 18

2.10 Applications

................................................................................................ 19

3.0 INSTALLATION - M

AGNUM 8000X INSTALLATION..................................... ……21

3.1 Locating the Magnum

8000X ...................................................................... 21

3.2 Connecting Ethernet M

edia.......................................................................... 21

3.3 Connecting Fiber Optic S

T-type “twist-lock”..............................................22

3.4 Connecting Fiber Optic S

C-type “snap-in”..................................................22

3.5 Connecting Fiber Optic S

ingle-Mode ........................................................23

3.6 Connecting Twisted-Pair, RJ-45 ................................................................23

3.6.1 100Mbps collision domain diameter, cable distances and PDV *

..... 24

3.6.2 Connection to NICs, that support Auto-negotiation

.......................... 27

3.7 Table-Top or S

helf Mounting ...................................................................... 27

3.8 Rack-Mounting

............................................................................................ 27

3.9 Port Module (PM) Installation* ..................................................................

28

3.9.1 Preparation for Installing and Removing P

Ms .................................. 28

3.9.2 Installing PM Cards in the Magnum

8000X*.................................... 30

3.9.3 Rem

oving PM cards..........................................................................31

3.10 Preparation for Installing and Removing SPMs * ...................................... 32

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3.10.1 Installing SPM module in Magnum 8000X *................................. 34

3.10.2 Removing SPM module *............................................................... 35

3.11 Powering the Magnum

8000X .................................................................. 35

4.0 OPERATION - .................................................................................................... 37

4.1 Repeater F

unctionality......................................................................... 37

4.2 Dual S

peed Functionality .................................................................... 37

4.3 Auto-negotiation and s

peed sensing .................................................... 39

4.4 Chasis LEDs...................................................................................... 39

4.5 Power Budget Calculations for Fiber Media *.………………

....... .40

5.0 I

NTRODUCTION - MAGNUM PORT MODULES (AS SEPARATE ITEMS IN A SHIPMENT). 41

5.1 Inspecting the Package and Product .............................................................

41

5.2 Product Description

...................................................................................... 41

5.2.1 FPM-MST (FX), FPM10-MST (FL), Fiber ST “twist-lock” connec . 42

5.2.1a FPM10-MST ,10Mbps multimode, FC- ST “

twist-lock” connec.... 42

5.2.2 FPM-MSC (FX), FPM10-MSC (FL), Fiber SC “snap-in” connect . 42

5.2.2a FPM10-MSC 10Mbps multimode FC- SC “snap-in” connector..... 43

5.2.3 Single-Mode FPMs, 10 and 100Mbps ............................................... 43

5.2.3a FPM10-SSC, 10Mbps Singlemode FC- SC “snap-in” connector.... 43

5.2.3b FPM10-SST,10Mbps Singlemode FC-ST “snap-in” connector...... 44

5.2.4 FPM-MTRJ, FX small-form-factor “

plug -in” connector ................. 44

5.2.5 FPM-MV45, FX small-form-factor “

plug -in” connector................. 44

5.2.6 FPM-SXMST and -SXMSC (100BASE-SX short wavelength)

....... 45

5.2.7 PM-RJ45 & PM-RJ45U (Tw

isted Pair).......................................... 46

5.2.8 PM-FP............................................................................................... 47

6.0 TROUBLESHOOTING .................................................................................. 48

6.1 Before Calling for Assistance....................................................................... 48

6.2 When Calling for A

ssistance........................................................................ 49

6.3 Return Material Authorization (RM

A) Procedure........................................ 49

6.4 Shipping and Packaging Information ......................................................... 50

APPENDIX A: WARRANTY IN

FORMATION ………........................................... 50

APPENDIX B: O

PTIONAL 48VDC POWER SUPPLY * ............................................……51

APPENDIX C

: INTERNAL DC DUAL-SOURCE POWER OPTION ............................……53

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Revisions

Rev D 05/02 : Updated the Rack Mounting and Appendix B & C with 24VDC &
125VDC Power Supply option

Rev C 05/01 : 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 01/01 : Added or changed

100Mbps collision domain diameter, cable
distances and PDV; Port Module (PM) Installation; Installing PM Cards in the
Magnum 8000X; Preparation for Installing and Removing SPMs; Installing
SPM module in Magnum 8000X; Removing SPM module; Power Budget
Calculations for Fiber Media;

Optional 48VDC power supply; Optional 48V Dual­Source DC power; Optional Dual Power Supply, AC Power; Optional Dual Power
Supply, 48VDC Power.

Rev A 03/99 : This revision is the initial release of the Magnum 8000X Mixed-Media
Fiber Hub user manual.

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1.0 Technical Specifications

Performance (hub supports both 10 and 100Mb domains, ports individually selected)
When a port is operating at 100Mbps

Data Rate: 100Mbps
PDV (Path Delay Value): 80BT, exceeds Class II

When a port is operating at 10 Mbps :

Data Rate: 10 Mbps
Partitioning: Enforced after 63 consecutive collisions
Auto-reconnect: Occurs after one packet of error-free reception

Network Standards

100Mbps : Ethernet IEEE 802.3u , 100BASE-TX, 100BASE-FX, 100BASE-SX
10 Mbps : Ethernet IEEE 802.3, 10BASE-T, 10BASE-FL

RJ-45 ports are auto-sensing for speed: IEEE 802.3u

Packet-Processing Between Domains (internal 10/100 sw

itch or bridge)

Filtering and Forwarding Rate from 100Mbps ports : 148,800 pps max
Filtering and Forwarding Rate from 10 Mbps ports : 14,880 pps m

ax.
Processing type : Store and Forward
Auto-learning : 8K address table, shared for both traffic domains
Packet buffers : 2MB,dynamically allocated & shared on both domains
Latency (not including packet time) : 100 to 10 Mbps : 5µs

10 to 100Mbps : 5µs

CPU Type : State Machine

Maximum Ethernet Segment (or Domain) Lengths

10BASE-T (CAT 3, 4, 5 UTP) - 100 m (328 ft)
100BASE-TX (CAT 5 UTP) - 100 m (328 ft)

Shielded twisted pair - 150 m (492 ft)

10BASE-FL multi-mode fiber optic - 2 km (6,562 ft)
10BASE-FL single-mode fiber optic

- 10 km (32,810 ft)

100BASE-FX, half-duplex:(multi-mode) - 412 m (1350 ft)
100BASE-SX, short wavelength hdx (m.m.) - 300 m ( 935 ft)
100BASE-FX, full duplex:(multi-mode) - 2.0 km (6,562 ft)
100BASE-FX, half-duplex:(single-mode) - 412 m (1350 ft)
100BASE-FX, full duplex:(single-mode) - 15.0 km (49,215 ft)

Operating Environment

Ambient Temperature: 32ºF to 122ºF (0ºC to 70ºC)
Storage Temperature: -20ºC to 70ºC

Ambient Relative Humidity: 5% to 95% (non-condensing)

Power Supply, AC (Internal)

AC Power connector : IEC-type, male recessed, rear of chassis
Power Input Voltage : 90 to 260 VAC (auto ranging)
Power Input Frequency : 47-63 Hz

Power Consumption :

25 watts typical, 30 watts max. P.S. rating

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DC Power Supply (Options)

-48VDC Power Input Voltage : 36 to 70 VDC
24VDC Power Input Voltage : 20 to 36VDC
125VDC Power Input Voltage : 120 to 160VDC

Std. Terminal Block : “ -, GND, + ”

Power Consumption: same as for AC models, see above

For Dual Source and Redundant DC for –48VDC, 24VDC Power & 125VDC
supply options (Optional), see Appendices

For optional 23” Telco rack-mount brackets, order Model # RMB-23W

Network Cable Types (Modular on a per-port basis)

Fiber ports at 100Mbps and/or at 10 Mbps:
Multi-mode (62.5/125 typical) and single-mode (9/125 typical)
100Mbps copper (RJ-45): Category 5 UTP/STP
10 Mbps copper: Cat 3, 4, 5 UTP (Note: auto-neg. doesn’t sense cable ty

pe)

Stacking Cable - stacking may be up to three units (48 ports) of mixed-media

8000X hubs and/or DS8016-A Dual-Speed hubs.

A stacking cable with 25 pin DB25 male connectors, shielded, 9 inches (23

cm

) long, is included with each Magnum 8000X-A add-on unit.

Manual Switches

Up-link Switch: RJ-45U Port Module only

(for crossover and cascading)

Auto/100 Switch: RJ-45 and RJ-45U port Module (for auto-negotiation or

fixed 100Mbps speed operation)

Packaging

Enclosure: High strength metal. 1U rack-mounting brackets included.

Suitable for wiring closet shelf, 19” rack or desktop mounting.
Dimensions: 1.75 in H x 17 in W x 9 in D ( 4.4cm x 43.2cm x 22.9cm)
Weight: 4.0 lb. ( 1.8 Kg)
Cooling method: Fan cooled, internal @ 9 cfm

LED Indicators

PWR : Steady On when power applied
BR : Steady On, unit has bridge module inside
COL 10 and 100 : Collision LEDs, one for each speed domain
ACT 10 and 100 : Activity LEDs, one for each speed domain

Agency Approvals

Safety :UL Listed (UL 1950), cUL, CE
Emissions: meets FCC Part 15, Class A

Warranty

Three years, return to factory Made in USA

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1.1 Specifications - Port Modules, for front ports of the Magnum 8000X

(For Power Budget data, see Section 4.5)

PM Model # IEEE Standard Speed Connector type -Mode

FPM-MST FX 100Mbps ST “twist-lock” multi-

FPM-MSC FX 100Mbps SC “snap-in” multi-

FPM-SSC FX 100Mbps SC “snap-in” single-

FPM-MTRJ FX 100Mbps MT-RJ “plug-in” multi-

FPM-MV45 FX 100Mbps VF-45 “plug-in” multi-

FPM-SXMST SX 100Mbps ST “twist-lock” multi-

FPM-SXMSC SX 100Mbps SC “snap-in” multi-

FPM10-MST FL

10Mbps ST “twist-lock” multi-

FPM10-MSC FL

10Mbps SC “snap-in” multi-

FPM10-SST FL

10Mbps ST “twist-lock” single-

FPM10-SSC FL

10Mbps SC “snap-in” single-

FPM-MFC FL

10Mbps FC “screw-on” multi-

PM-RJ45 -T, TX 10/100 auto-neg. RJ-45 twisted pair

PM-RJ45U -T, TX 10/100 auto-neg. RJ-45 with up-link sw. TP

PM-BLNK Blank cover for an unused port slot

Two LED indicators per fiber port, in each PM, are “L” for LINK is made, “A” for traffic Activity.

Additional L

ED for RJ-45 ports are “S” for Speed, where flashing indicates auto-negotiation is

ready (or nothing is connected), steady ON indicates 100Mbps operation and OFF means

10 Mbps

operation has been selected by the last auto-negotiation session.

1.2 Specifications - Switching Port Modules (SPMs) for bonus port

* PDV (path delay value) of an SPM is the same as a user-node i.e. , 50 BT

SPM Type * SPM-TTX SPM-FDSC SPM-FDST SPM-FDSSC

Physical Signaling Type

100BASE-TX

& 10BASE-T

100BASE-FX

mm* f. duplex

100BASE-FX

mm* f. duplex

100BASE-FX

sgl.mode, fdx

Connector Type

RJ-45 Fiber-SC Fiber-ST Fiber-SC

LINK LED

yes yes yes yes

Receive (RX) LED

yes yes yes yes

Up-link switch

yes n.a. n.a n.a.

10/100Mb switch

yes n.a. n.a. n.a.

(For power budget data, see Section 4.5)

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1.3 Ordering Information (see Appendices for DC power supply options)

Magnum 8000X Mixed-Media Fiber Hubs **

Magnum 8000X Base Chassis with 16 Port Module (PM) slots for 10/100

operation per port. Any mix of 100Mbps and 10 Mbps Fiber PMs (see list below) may be
factory or field configured. Includes a switch inside that bridges the two internal traffic
domains. Has a bonus port for an optional switched fiber or copper (SPM) backbone
connection. May be stacked with up to two DS8016-A or -E or 8000X-A add-on units for up
to 3 units (48 front ports for users) in a stack. Internal universal power supply.

Magnum 8000X-A Add-on Chassis, 16 PM slots, no switch inside, use for stacking

8000X Front Port Modules (PMs):

FPM-MST Module w/ 100Mbps mm* Fiber FX ST connector
FPM-MSC Module w/100Mbps mm* Fiber FX SC connector
FPM-SSC Module w/100Mbps sgl.m* Fiber FX SC connector
FPM-MTRJ Module w/100Mbps mm* Fiber FX MT-RJ connector
FPM-MV45 Module w/100Mbps mm* Fiber FX VF-45 connector
FPM-SXMST Module w/100Mbps mm* Fiber SX ST connector (when available)
FPM-SXMSC Module w/100Mbps mm* Fiber SX SC connector (when available)

FPM10-MST Module w/10Mbps mm* Fiber FL ST connector
FPM10-MSC Module w/10Mbps mm* Fiber FL SC connector
F PM10-SST Module w/10Mbps sgl.m* Fiber FL ST connector
FPM10-SSC Module w/10Mbps sgl.m* Fiber FL SC connector
FPM-MFC Module w/10Mbps mm* Fiber FX FC “screw-on” connector

PM-RJ45 Module w/ RJ-45 for TP copper, supports 10/100 auto-negotiation

PM-RJ45U Same as PM-RJ45 except includes an up-link (crossover) switch

PM-BLNK Blank cover for an unused port.

Switch Port Modules (SPMs) for the Bonus Port:

SPM-FDSC SPM w/ full-duplex multi-mode fiber FX SC connector, includes

a separate switch with packet buffers and filter/forward operation
SPM-FDST Same as -FDSC, but with ST connector
SPM-FDSSC SPM w/ full-duplex single-mode fiber FX SC connector, includes

a separate switch with packet buffers and filter/forward operation
SPM-TTX SPM with RJ-45, manually selected as 10Mb or 100Mb speed

* mm = multi-mode, sgl.m = single-mode
** To convey configuration information to the factory, order chassis units followed by the
PMs to be configured in it. For example, to order a Model 8000X Hub with a ten FPM10­MST ports factory installed, call out “Qty 1 Model 8000X" and then in sequence “Qty 10
Model FPM10-MST” as separate line items. This signifies that the ten FPM-MST modules
are to be factory-configured in the 8000X unit. To order loose modules for field
configuration, order “Qty 10 Model FPM10-MST (do not configure)”, for example.

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

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2.0 Introduction - Magnum 8000X Mixed-Media Fiber Hub

2.1 Inspecting the Package and 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 8000X Base Unit (may have PMs factory configured)

1 - AC Power Cord (U.S. and other 115 vac only)

1 - Set of metal "Ears" for optional 19” rack mounting

1 - (Model 8000X-A only) Stacking Cable, 9” length

1 - Installation and User Guide

1 - Product Registration Card

Note: Port Modules (PMs) purchased with the 8000X unit are usually factory

configured and installed, and may be included as part of the 8000X unit

when it is received.

Port Modules purchased for field installation w

ill be boxed in a “bar-of-

soap-size” cardboard carton with labeling to indicate the contents.

Remove the unit from the shipping container. Be sure to keep the shipping

container should the unit need to be shipped at a later date. To validate the product

warranty, please complete and return the enclosed Product Registration Card to

GarrettCom, Inc. as soon as possible.

In the event there are items missing or damaged contact the supplier. If the

unit needs to be returned please use the original shipping container. Refer to Chapter 5,

Troubleshooting, for specific product return procedures.

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2.2 General Information

Designed for “fiber-to-the-desktop” applications that are economical and

high performance, the Magnum 8000X accepts a variety of fiber modules so that users

can choose the fiber port types desired. A dozen different 100Mbps and 10 Mbps fiber

port module types are supported, and they are factory or field configurable.

Rich with configuration options, the 8000X units support either 10 or

100Mbps fiber modules per port, a rear bonus port accepts optional Switch Port

Modules for switched backbone connections, stacking up to 3 units high (48 ports) is

supported with DS8016-A Hubs configurable in the stacks, rack-mounting is standard,

optional 48V DC power supplies (even dual-source DC or redundant DC) are available

for telecom equipment applications, and RJ-45 ports when used are auto-sensing for

speed.

2.3 Product Description

The Magnum 8000X brings you the future of Fiber Optic connectivity. The

Magnum 8000X based on new technology is a highly versatile, cost effective Mixed-

Media Fiber hubs that provides the flexibility of configurable fiber and RJ-45 ports, of

10 Mbps or 100Mbps Ethernet speed per hub. Each RJ-45 port is independently auto-

sensing for 10/100 speed, adapting to match the speed of the connecting device. These

capabilities provide the ultimate in flexibility for small to medium sized “fiber to

desktop” and “fiber-for-security” networks that are gradually transitioning from 10

Mbps Ethernet to 100Mbps Fast Ethernet. Sixteen port slots are located on the front of

the unit, are accommodated in a 1U rack-mount package.

Combinations of standard Ethernet media ty

pes are supported. These

include 10BASE-FX, 10BASE-T, 100BASE-FX, 100BASE-TX, and (proposed)

100BASE-SX. The Magnum Dual -Speed 8000X supports almost all the popular fiber

port connector i.e. ST, SC, FC, MT-RJ, and VF-45 in multi-mode or single-mode as

applicable, and can be installed as 100Mbps or 10 Mbps speed (10Mb port connector

types are ST, SC and FC only). The Magnum 8000X hubs support two shared traffic

domains, one at 100Mbps and one at 10 Mbps, with an internal bridge or switch

interconnecting the two domains. The automatic per-port speed-sensing is continuous,

allowing a connected device to change speed and re-LINK at any time without

impairing the operation of the other ports and connected devices.

The Magnum 8000X is designed with the capability to be stacked with other

Magnum 8000X-A’s and/or with Magnum 8016-A’s. Magnum 8000X units may be

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configured in a stack with as many as 3 total units. The two shared traffic domains

automatically expand to support all of the ports in the stack. Any combination of 10 and

100Mbps ports, up to the maximum 48 ports (3units) in one stack, can be use at any

time. In a stacked configuration, the complete stack operates as one logical dual-speed

repeater. Depending upon the stack configuration (any mix of Magnum 8000Xs,

Magnum 8016s units), up to 48 front Ethernet segments with any mix of fiber and

copper ports is supported.

The Magnum 8000X is compact in design at only 1.75 in. (4.4 cm) high, and

has a lightweight metal enclosure. It is easily rack mounted in a standard 19" rack and

typically operates as the central hub for a multiple-backbone Ethernet network.

2.3.1 The Magnum 8000X Fiber Hub Chassis

The Magnum 8000X chassis houses one main PC board and an internal

bridge module (daughter board). There are 16 front slots for mixed-media modules.

Each front slot in the dual-speed chassis can accept any

8000X Port Module (PM)

which will provide either 10 or 100Mbps operation over either fiber or twisted pair

cabling. The 8000X is configured by selecting individual PMs, one per Ethernet port to

be used. Configured 8000X units provide two traffic domains, one each with IEEE

802.3 and 802.3u repeater functionality.

Figure 2.3.a: Magnum 8000X, Front View

LEDs to indicate operating status are on the left front side. There are power

(PWR) and bridge-inside (BR) indicators for the unit. There are collision (COL)

indicators for each of the 10 Mbps and

100Mbps domains for visual indication

of the operating status of each domain,

and two activity (ACT) indicators for

traffic activity on each domain. These

LEDs provide a visual assessment of the

operational condition and aggregate

network activity of all segments installed in the unit.Figure 2.3.b: Front Panel LEDs

AC Power Connector: On the right side rear of the unit is the connection to

the auto-ranging internal power supply that automatically adapts to the AC voltage of

10 10 0

PWR BRD

ACT
COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

10 100

A

CT

COL

Magnum 8000X

Mixed-Media Hub

PWR BRD

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the AC power system into which it is being installed. An ON/OFF power switch is used

for powering the hub on and off when it is placed in or taken out of service, or when it

needs to be reset. AC Power input is auto-ranging, from 100 to 240vac with a frequency

of 47

to 63 Hz. When shipped for use in U.S. and Canada, a 115vac power cord is included.

Figure 2.3.c: Magnum 8000X Rear Panel View

Cooling Fan: The Magnum 8000X is equipped with a low noise 9 cfm

fan. The fan will maintain low temperature operation inside the unit to

maximize reliability, even in wiring closets with ambient temperatures up to 50°C.

Bonus Port: The Magnum 8000X features a bonus port slot that is rear-

mounted and is optionally

configured with any one of the Switch Port Module (SPM)

types. An SPM will segment the 8000X from the other parts of the network connected

to it, providing flexibility in the network topology. This flexibility is especially

desirable for 100Mb traffic domains which are Path Delay Value (PDV) limited.

PMs for the front slots may not be used in the rear Bonus Port slot.

Inter-Repeater Bus (IRB): The IRB allows a Magnum 8000X unit to be

stacked with up to two Magnum 8000X-A and/or Magnum DS8016-A units to form

one logical dual-speed repeater. Instructions for the using the IRB connectors on the

Magnum 8000X are discussed in detail in Section 2.6, "Stacking Magnum 8000Xs".

2.4 Port Modules (PMs)

To provide maximum application flexibility, individual Port Modules

(PMs) are used with the Magnum 8000X. The Magnum 8000X features 16 PM slots on

the front of the unit and a bonus port slot on the rear of the unit, some (minimum of 2)

or all of which may

be configured at a given time. The bonus slot allows for an optional

rear-mounted switched Ethernet segment connection, typically to a backbone.With the

bonus slot, the 8000X becomes a 16-port dual-speed hub with one switched up-link.

There are a total of six standard PM cards, each for a specific media cable

connector. A seventh m

odule type is used as a face plate when any front slot is not

AC Powe r
Con ne c t o r

Bonus Port Sl ot, confi gurable vi a
Port Module ( PM)

(SPM - FST shown)

1 8

Inter-Repeater Bus (IRB)
P3 - Interface to unit above.
P4 - Interface to unit below.

R L

OUT

IN

ON

OFF

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used. The Magnum 8000X PM network connector types, shown left-to-right in Figure

2.3a below, are “PM-RJ45U” for RJ-45s (10BASE-T or 100BASE-TX, UTP and STP)

with an up-link switch, “FPM-MTRJ” for fiber MT-RJ (small form factor 100BASE-FX

multi-mode), “FPM-MSC” for 100Mb fiber SC (100BASE-FX multi-mode) and same-

in-appearance “FPM-SSC” for 100Mb fiber SC (100BASE-FX single-mode), “FPM-

MST” for 100Mb FX fiber ST m.m., “FPM-MV45” for fiber VF-45 (small form factor

100BASE-FX multi-mode), the “FPM-SXMST” for 100BASE-SX (short-wavelength

Figure 2.4: Magnum Port Modules: PM-RJ45U, FPM-MTRJ,

FPM-MSC, FPM-MST, FPM-MV45, FPM-SXMST, & PM-FP

multi-mode ST), designed to be compatible with 10 Mbps FL, when available), and

“PM-FP” for the face plate to cover blank slots. PM-RJ-45 (not shown) looks like PM-

RJ45U but without the up-link switch. For additional details and descriptions of each

Port Module, see Section 5 of this manual.

PMs for other fiber port types (for example, 10 Mbps FC-type) are possible as

specials. If you need a different port type from those shown, contact GCI

Magnum PMs are normally installed in the front of Magnum 8000Xs at the

factory

prior to shipment, but may be installed or changed or removed in the field by a

careful technician. The PM removal / addition procedures are described in Section

5.2.1.- 5.2.7.

2.5 Switch Port Modules (SPMs)

Magnum Switch Port Modules (SPMs) provide a compact switching port that

filters and forwards packets, thus separating internal and external collision dom

ains and

enhancing the performance and configurability of the network. Unless specified at the

time of order, each Magnum 8000X is shipped from the factory with no bonus port

SPM installed. For application flexibility, any of the Magnum SPMs may be specified

1

A L S

A L A L

A L A L A L

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for factory configuration at time of order. It is also possible for the rear bonus port to be

re-configured in the field by a trained technician to add or exchange a Switching Port

Module. Figure 2.5a below shows the internals of the Magnum 8000X with an SPM

installed in the Bonus Port, accessible from the rear.

Figure 2.5a: Inside view of Magnum 8000X with SPM installed. (Rear view)

For the specifications of available Switch Port Modules (SPMs), see Section

1.3. The functions of an SPM are described below.

1. Filtering and Forwarding / Address Learning

The SPM has two ports - one where media attaches, and one connecting into

the inside of the m

ixed-media fiber hub in which the SPM is mounted. For each packet

received by either port of the SPM, a decision is made to either filter the packet or to

forward the packet to the other port. Error packets are always filtered. For good packets,

the filter or forward decision is made based on the destination address contained in each

packet. If the destination address is on the segment from which the packet originated,

then it is filtered and not forwarded to the other segment. If the destination address

didn’t find a match in the address table, then is it forwarded to the other segment. If it is

a new address which the SPM didn’t previously didn’t know about, it “learns” the new

address and puts it in the port’s address table. The address tables have a capacity of 1K

addresses for each port.

MAIN BOARD

SPM
MODULE

POWER
SUPPLY

F

A

N

STACK ING
CONNECTO RS

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With this large address table, SPM port modules can serve the needs of

medium-sized to large networks. The address tables are flushed periodically to update

the network status and to purge any inactive stations from the tables. See the figure and

table that follows:

Packet Source Destination Address Table Filter/Forward
Source Address Address Maintenance Action

Seg. 1 Not in table Not in table Add source to table Forward

Seg. 1 Not in table In table Add source to table Filter

Seg. 1 In table Not in table None Forward

Seg. 1 In table In table None Filter

Seg. 2 Not in table Not in table Add source to table Forward

Seg. 2 Not in table In table Add source to table Filter

Seg. 2 In table Not in table None Forward

Seg. 2 In table In table None Filter

Table 2.5: SPM Port Module Functionality

2. Throughput Increase / Software Transparency

By selectively forwarding packets from the mixed-media hub’s ports (or hub stack’s

ports) to the rear-connector port based on its s

witching logic, an SPM increases the

available bandwidth for the users on both the hub side and the rear-segment side of the

network. As shown in Figure 2.5b, it keeps the local traffic on each side contained,

preventing unnecessary packets and bad packets from traveling to the other segment

and using up bandwidth needlessly. This results in more available network bandwidth

on both sides and a throughput increase for all users on both segments. An SPM needs

Figure 2.5b: Forwarding vs. Filtering in SPM Modules

Segment 1’s packets are forwarded
when the destination addresses are

NOT

in its address table.

Segment 2’s packets are forwarded
when the destination addresses are

NOT

in its address table.

Segment 1’s packets are filtered
when the destination addresses are
in its address table.

Segment 2’s packets are filtered
when the destination addresses are
in its address table.

SPM Module

100

1
0

Segment 1 Segment 2

(Bonus Port)

(Inside of Hub)

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no software configuring and is transparent to system and application software, including

network management software.

2.5.1 Magnum SPM-FDST

The significant feature of the SPM-FDST is that the fiber

bonus port operates in full-duplex mode, sending packets on

one fiber filament while simultaneously and independently

receiving packets on the other. There is no “collision

domain” with full- duplex, and while this violates the specs

of traditional Ethernet, it is accepted in most situations.

Therefore, the SPM-FDST extends the distance limits of Fast

Ethernet. In particular, with multi-mode fiber, it permits Fast

Ethernet cable distances of up to 2km, much more than the 412m half-duplex distance

limit otherwise obtainable.

These SPMs can also be configured to operate as a half-duplex switch port.

As shown in the figure, the jumper located on the SPM board by default is factory set

to full-duplex mode (position 2-3).

By setting the jumper in position 1-

2, it will operate as shared (half

duplex). To operate properly in

either half- or full-duplex mode, the

device on the other end of the fiber

segment must also be a

corresponding device. Since full-

duplex Fast Ethernet (802.3x) is a

recent 1997 standard, it is

recommended that the device on the

other end of the segment be another

full-duplex fiber SPM or equal.

As is typical for bridges and switches, the internal packet buffer space of the

SPM-FDST tem

porarily stores unfiltered packets. It is desirable to have a large packet

buffer for temporary storage, particularly when operating at different speeds (such as 10

and 100) or with different traffic types (shared and full-duplex). The SPM-FDST packet

Magnum SPM-FDST

R
X

L
I

N
K

F

U

L

L

D

U

P

L

E

X

Magnum SPM-FDST

R
X

L
I

N
K

F

U

L

L

D

U

P

L

E

X

HALF FULL

DUPLEX MODE

1

HALF FULL

1

HALF DUPLEX

HALF FULL

1

FULL DUPLEX

(Default)

FULL/HALF JUMPER

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buffer is 1Mbps to maintain high network performance. The MAC address memory is

8KB, suitable for medium to large networks.

In summary, the Magnum SPM-FDST is a multi-mode fiber optic switching

port module. It has 100Mb ST-type connectors. There are two LEDs, LINK and RX,

to allow monitoring of LINK and packet reception (Activity) status of the SPM. The

SPM may be used to connect to another full-duplex 100Mbps hub or switch using

fiber cabling and using the 100BASE-FX protocol. It filters and forwards packets in

both directions at Fast Ethernet wire speed.

2.5.2 Magnum SPM-FDSC

The Magnum SPM-FDSC is a multi-mode, full-

duplex fiber optic switching port module with a

100Mb SC-type connector. The module may be used

to connect to another 100Mbps hub or switch using

fiber cabling and the 100BASE-FX protocol. It filters

and forwards packets in both directions at Fast

Ethernet wire speed.

The operation and application of the SPM-

FDSC is the same as the SPM-FDST described

above, except for the connectors on the fiber cable.

2.5.3 Magnum SPM-FDSSC

The Magnum SPM-FDSSC is a single-mode, full-duplex fiber optic switching port

module with a 100Mb SC-ty

pe connector. The module may be used to connect to

another 100Mbps hub or switch using fiber cabling and

using the 100BASE-FX protocol. It filters and forwards

packets in both directions at Fast Ethernet wire speed.

Since the SPM module segments the network, it also

maintains its address tables to know what node

addresses are on which side of the unit.

The Magnum SPM-FDSSC includes full

switching functionality

and has two LED’s -

LINK and RX - to allow monitoring of link and

activity status of the SPM. The Magnum SPM-

FDSSC is a full duplex module. Thus, two

Magnum SPM-FDS

C

RX

LINK

F

X

SHARED

Magnum SPM-

FDSSC

RX

LINK

FX

SHARED

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SPM-FDSSC’s can be used together on each end of a fiber segment to get the

maximum distance of 15km of single-mode fiber optic cable in a Fast Ethernet

network. For an SPM-FDSSC used to connect into a separate collision domain,

the cable distances and hop-counts allowable would have to be calculated

taking into account all the devices’ Path Delay Values (PDVs) that are part of

that domain.

An SPM operating at 100Mbps has a PDV of 50 BT, i.e., the same PDV as a

DTE or NIC card in a Fast Ethernet collision domain.

2.5.4 Magnum SPM-TTX

The Magnum SPM-TTX is a 10 Mbps or 100Mbps device equipped with

one RJ-45 port which supports either 10BASE-T and 100BASE-TX. The

10/100 speed selection is done with a manual switch on

the unit to prevent ambiguity where it may be used with

other devices such as NICs that are auto-sensing.

The SPM-TTX filters and forwards packets, m

aintains

its address tables, and segments the network when used as a

10BASE-T or a 100BASE-TX switch port. See Sections 2.5 and

2.5.1 for a general description of an SPM. The SPM-TTX

includes an up-link switch to allow for connection to either user

nodes or for cascaded up-link connections to other hubs. The

attached devices may be either 10 Mb or 100Mbps.

The Magnum SPM-TTX has two LED’s - LINK and

RX - to allow monitoring of link and packet reception status of the SPM’s operation.

2.5.5 SPM Specification Summary Table

(See also “Specifications - SPMs,” Section 1.3)

Magnum SPM-TTX

100 10

M
b
/

s

U
P
L

I

N
K

R
X

L
I

N
K

Connector Standard Mb/s Traffic Pkt Buffer Address

SPM-FDST

Fiber-ST 100BASE-FX 100/200

full-duplex

1MB 8K total

SPM-FDST

Fiber-SC 100BASE-FX 100/200 full-duplex 1MB 8K total

SPM-SSC

Fiber-SC 100BASE-FX 100/200 full-duplex 1MB 8K total

SPM-TTX

RJ-45

10BASE-T & 100 -TX

10 or 100 shared 256KB 1024/port

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2.6 10 /100 Speed Auto-sensing (8000X front copper ports only)

Twisted pair copper ports (PM-RJ45 or PM-RJ45U only) support auto-

sensing for speed, independent of the other ports. Speed-sensing is performed by the

Magnum 8000X’s electronics in accordance with the standards of the IEEE 802.3u

auto-negotiation standard. If the connected device or node indicates that it is capable of

100Mbps speed, then operation on that port will be at 100Mbps. If the connected

device does not positively indicate that it is capable of 100Mbps speed, then the

operation on that 8000X port will be at 10Mbps. Of course, the hubs’ auto-negotiation

technique is only for 10 / 100 speed, and does not provide for any full-duplex operation.

When a twisted-pair port is connected and LINK is

present, the speed on that

port that has been sensed by the Magnum 8000X Mixed-Media Fiber Hub will be

indicated by the ‘S’ LED for that port. The ‘S’ LED is steady ON when 100Mbps speed

is sensed, and is steady OFF when 10Mbps speed is in use. When the port is not

connected, the ‘S’ LED on that port will be blinking to indicate that it is trying to auto-

negotiate. (See section 4.3 for the LED’s).

2.7 Stacking Magnum Mixed-Media 8000X Fiber Hubs

The rear of the Magnum 8000X Mixed-Media Fiber Hubs have an Inter-

Repeater Bus

(IRB) connector on the left side. The IRB interconnects stacked units with

a stacking cable, enabling all stacked Magnum 8000X units to operate as a single dual-

speed repeater. There are two 25-pin IRB connectors on each unit: the bottom IRB

connector which is used to daisy chain the IRB to the stacked unit below (unused on

bottom unit in a Magnum 8000X stack); and the top IRB connector which is used to

daisy chain the IRB to the stacked unit above (unused on top unit in a Magnum 8000X

stack). The IRB connectors for non-stacked units are unused.

The IRB stacking shielded cables supplied with each Magnum 8000X-A unit

are slightly

longer than the base unit height. The operation of the stack will not be

impaired by longer IRB RS232 cables. Stacks with total IRB lengths of as much as 9-

inch long shielded cables can be implemented. However, non-standard IRB cable

lengths, longer cables or unshielded cables are not permitted as they will not operate

properly at 100Mbps speeds.

The 8000X Mixed-Media Fiber Hub can be stacked with Magnum DS8016-A

m

odels, too. (But not with DS8016-B because of the “bridge-inside” conflict)

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Normally, one Magnum 8000X hub is needed to provide a switch between the 10 and

100Mbps domains.

With one base model Magnum 8000X, up to two additional 8000X-A “add-

on” units or two DS8016-A hub units can be stacked to operate as one 10/100 Dual-

Speed repeater with up to 48 dual-speed ports, with any mix of fiber and copper port

types.

When connecting mixed-media 8000X’s in a stack, use the stacking RS232

cable to connect the “OUT” stacking port from one 8000X unit to the “IN” stacking

port of the other. Push in the cable connectors until they

seat in firmly. Also, leave

space along the left-side area for the exhaust of the internal cooling fan in each 8000X

unit.

Figure 2.7b Magnum 8000X’s stacked. Cables connect “Out” and “In”

2.8 Bridge Module between the 10 Mbps and 100Mbps Domains

Magnum 8000X’s contain a factory-installed bridge module to interconnect

the two traffic domains, filtering and selectively forwarding packets to allow only

necessary packets to cross between the domains. This enables all of the users and nodes

connected into either domain, whether 100Mbps or 10 Mbps , to communicate to each

other, and it keeps local traffic on one domain from consuming any of the bandwidth of

the other domain.

Fig.2.7a A stack of one Magnum 8000X and two DS-8016-A’s

10 100

PWR BRD

ACT
COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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

1 X

LK/RX
PORT

100

1

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

PWR

BR

COL 10
COL 100

Magnum DS8016 Stackable Hub

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

1 X

LK/RX
PORT

100

1

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

PWR

BR

COL 10
COL 100

Magnum DS8016 Stackable Hub

IN

ON

OFF

BONUS PORT

IN

IN

ON

OFF

BONUS PORT

ON

OFF

BONUS PORT

FAN

EXHAUST

OUT

IN

OUT

IN

OUT

IN

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The bridge operates in the store-and-forward mode, which filters out bad

packets and maintains optimum performance in both domains. Packet forwarding delay

is only 5µs (plus packet time), much less than traditional store-and-forward bridge

products, enabling the 8000Xs to maintain high network performance. The bridge has

8K node address capacity, suitable for use in large networks. Addresses are self-

learning so that filtering / forwarding of 10 Mbps and of 100Mbps packets is

maintained correctly even when users move their connection, or change speed, or power

down.

Figure 2.8 : Internal view of 8000X with bridge module installed

The Magnum 8000X’s bridge module is implemented as a daughter board. 8000X units

have an LED on the front labeled BR that will be ON when the module is installed

internally. (The Model 8000X-A is an “add-on” unit for stacking, and has no bridge

inside, so it’s BR LED will be off). In a stack of Magnum 8000X’s and / or other

compatible hubs, only one unit with a bridge inside may be operating in any one stack.

Bridge Module

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2.9 Features and Benefits

! Supports 10 or 100Mb network connections on each of sixteen ports

Magnum 8000X Dual-Speed Fiber Hubs combine two logical hubs --- one at 10 Mbps

and one at 100Mbps --- in one physical box supporting two traffic domains. Each port

can operate at either 10 or 100Mbps, independently of the other ports.

! Mixed-Media 10 & 100Mb fiber port ty

pes in one unit for maximum flexibility

The Magnum 8000X is configurable with up to 16 economical port modules, and any or

all of the ports may be either 10 or 100Mbps fiber. RJ-45 ports may also be configured,

with per-port selection. Port Modules with all kinds of fiber connector types are

supported, making the 8000X Fiber Hub ideal for “fiber-to-the-desktop” applications.

! Switched port in the rear Bonus Port for a FDX fiber backbone, optional

To segment a Magnum 8000X (or stack) from a connected hub or switch using full-

duplex fiber operating at 100Mbps, an optional SPM may be installed. This provides

distances up to 2Km for the fiber link, and improved performance for the 8000X’s

users.

! Stackable and Scaleable Configurations

The Magnum 8000X is equipped with an inter-repeater bus that allows multiple units

(one 8000X and up to two 8000X-A units or two DS8016-A) to be stacked, thus

supports up to 48 ports with all ports operating as a single dual-speed mixed-media

repeater.

! Auto-sensing for speed, 10 or 100Mbps, on each RJ-45 front port

All RJ-45 ports support 10/100 auto-negotiation for speed, IEEE802.3u. compliant.

! LEDs for Chassis and PM Cards

The Magnum 8000X chassis and each of the 16 front-mounted PM cards are equipped

with traffic activity and segment-status LEDs, conveniently monitored from the front.

! Installation is “Plug and Play”, Operation is Transparent to Softw

are

The Magnum 8000X operates as a hardware switch between domains, only forwarding

those packets from each domain that are needed on the other domain. Internal address

tables are self-learning, enabling users to change port connections or 10 or 100Mbps

domains without affecting operations.

! Inte

rnal Power Supply, Auto-ranging AC voltage and frequency

An internal universal power supply allows any Magnum 8000X unit to be used with the

normal AC power types found around the world. (A 48VDC power supply is optional)

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2.10 Applications

The 8000X Port Modules are factory and field configurable. This (and the

stacking feature) provides for easy expansion of the network, and it provides flexibility

to adapt to new fiber port connector types as technology changes. The flexibility of the

Magnum 8000X makes it the choice for applications that require a flexible and

adaptable 10/100 hub.

See also Section 1.0, Technical Specifications, for additional Magnum 8000X

inform

ation that may indicate suitable applications.

Example 1: Upgrade, Expansion, Fiber Flexibility : A University

library has fiber

cabling installed in the building from the wiring closet to each PC. They have operated

the network setup at 10 Mbps. They have five users, a 10Mbps print server, and

Internet access. Now they require higher bandwidth to accelerate their network. They

want to upgrade three of their present users to 100Mbps speed and expand for another

five 100Mbps users (all with fiber), and they expect a few more users next year.

A Magnum 8000X Dual-Speed Fiber Hub handles all of the users at 10 Mbps

and 100Mbps over fiber and copper in the same hub unit. Port modules can be changed

or added over tim

e to suit expansion and additional changes. The 8000X is initially

configured with eight ports at 100Mbps fiber, two ports at 10Mbps fiber, and three

10/100 RJ-45 copper ports. The Magnum 8000X not only increases the network’s

bandwidth and efficiency, but it also handles existing 10Mbps nodes over fiber in a

economical way. The print server stays at 10Mbps over twisted pair wiring, and is

accessible by all users. The file server and the Internet access, devices located adjacent

to the 8000X, operate over twisted pair at 100Mbps.

A diagram of the installation is shown here.

Example 2: Security, Fiber Flexibility: In a governm

ent intelligence agency where a
secure network is the first priority, the possibility of eavesdropping (as is possible with
copper wiring) must be prevented. Fiber LANs are regularly used to connect to each
desktop and each node.

Magnum 8000X configured here with

8 100Mb fiber, 2 10Mb fiber, 3 10/100 RJ-45

Print Server

10

UPLINK

Server

Router

100

100

100

100

100

100

100

100

100

8 100Mb fiber segments

1

0

0

M

b

R

J

-

4

5

10Mb RJ-45

Magnum ST80-F

1

0

M

b f

i

be

r

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The Magnum 8000X Fiber Hubs support all of the fiber port types (including the latest
models), adapting the fiber LAN to changing technology. The Dual- Speed feature
provides for growth in performance to higher bandwidth 100Mbps speed, and the per­port modularity plus stacking provide for port expansion.

Example 3: Future-proofing, industrial environments: In heavy industrial plants
(such as steel mills, electrical generating stations, telecom central offices, hospitals,
etc.), fiber LAN cables are usually used for noise immunity and electrical ground­isolation. In this kind of environment where computer systems are used to monitor and /
or manage operations, an Ethernet fiber link is used to collect real-time data via SNMP
agents in the equipment. The SNMP management fiber network almost always operates
at 10 Mbps. Network management workstations and network servers use 100Mbps
ports to the high performance nodes.

The Magnum 8000X Dual-Speed Fiber Hub is ideal in these situations. The

fiber ports are economical and may

be a mix of 10 and 100Mbps, and may be any
quantity or mix of standard port connector types. Individual 10/100 RJ-45 ports may be
configured also, and an optional SPM can segment local users from the rest of the
network. Stacking provides capacity for up to 48 ports, and the 8000X can be stacked
with a DS8016-A for a mix of RJ-45 and fiber ports. The flexibility results in a
“future-proof” fiber hub. The illustration below shows this type of installation.

Magnum 8000X has 16 ports per unit,
is stackable u

p

to 3 units, and economicall

y

supports all fiber types to the desktop for
maximu

m

security and flexibilit

y

.

Server

100

100

100

100

100

100

Router

Print Server

Fiber segments, 100Mb or 10Mb

Magnum 8000X offers a full range of fiber port
modules (both 10Mb and 100Mb), 10/100 RJ-45,
and stackability for the ultimate in “future-proofing”,
even noisy specialty environments

Server

100

100

100

100

100

100

Router

Print Server

Magnum DS80
101/00 Personal Hub

10BASE-FL

Fiber Segment

1

0

10

100

100

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3.0 Magnum 8000X Installation

Before installing the equipment, it is necessary to take the
following precautions:

1.) If the equipment is mounted in an enclosed or multiple rack

assembly, the environmental temperature around the equipment
must be less than or equal to 50

0

C.

2.) If the equipment is mounted in an enclosed or multiple rack

assembly, adequate air flow must be maintained for proper and
safe operation.

3.) If the equipment is mounted in an enclosed or multiple rack

system placement of the equipment must not overload or load
unevenly the rack system.

4.) If the equipment is mounted in an enclosed or multiple rack

assembly, verify the equipment’s power requirements to prevent
overloading of the building/s electrical circuits.

5.) If the equipment is mounted in an enclosed or multiple rack

assembly verify that the equipment has a reliable and
uncompromised earthing path.

Installation: This section describes installation of the Magnum Mixed-Media 8000X

Hub, as well as connection of the various Ethernet media types.

3.1 Locating the Magnum 8000X

The location of the Magnum 8000X is dependent on the physical layout of the

network and the area to be served. The unit is ty

pically rack mounted in a

wiring closet but because it has rubber feet it can also be installed on a shelf

or table top. While stacks of up to 3 units and the associated cabling can be

accommodated on a shelf or table top, it is recommended that larger stacks be

rack mounted. Each unit is shipped with a pair of metal "ears" that attach to

each side of the unit to easily accommodate mounting in standard 19"

RETMA racks. (Brackets for 23” telco racks are optional at extra cost).

3.2 Connecting Ethernet Media

The Magnum 8000X Mixed-Media Fiber Hub is specifically

designed to support all standard Ethernet media ty

pes within a single hub

unit. This is accomplished by using a family of Port Modules (PMs) which

can be individually selected and configured per-port. See Section 2.4 for a

description of the PMs.

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The various media types supported along with the corresponding IEEE

802.3 and 802.3u standards and connector types are as follows:

IEEE Standard Media Type Max. Distance 8000X Port Module

Fiber:

10BASE-FL mm

1

Fiber 2.0km(6562 ft) FPM10-MST, FPM10-MSC

sgl.m

2

Fiber 10.0km(65620ft) FPM10-SST, FPM10-SSC

100BASE-FX

mm1 Fiber 200 m

3

(650 ft) FPM-MSC, FPM-MST

small form factor “ “ FPM-MTRJ, FPM-MV45

sgl.m

2

Fiber 200 m

3

(650 ft) FPM-SSC

100BASE-SX (proposed, 850nm mm1) 150 m3 (500 ft) FPM-SXMST, -SXMSC -

short wavelength

Copper:

10BASE-T & 100BASE-TX twisted pair 100m (328 ft) PM-RJ45, PM-RJ45U

1

mm = multi-mode

2

sgl.m = single-mode

3

max. each for two segments in a 100Mb collision domain. Single segment is 412m for FX and 300m for

SX.

3.3 Connecting Fiber Optic ST-type, “twist-lock”

The following procedure applies to installations using an PM with

ST-type fiber connectors. This procedure applies to ports using an FPM-MST,

FPM10-MST, FPM10-SST single-mode, FPM-SXMST, and to SPM-FDST.

1. Before connecting the fiber optic cable, remove the protective dust caps from
the

tips of the connectors on the FPM. 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 FPM to the
Receive (RX) port of the remote device. Begin with the color-coded strand of
the cable for this first TX-to-RX connection.

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

5. The LINK LED on the front of the PM will illum

inate when a proper connection
has been established at both ends (and when power is ON in the unit). If LINK
is not lit after cable connection, the normal cause is improper cable polarity.
Swap the fiber cables at the Port Module connector to remedy this situation.

3.4 Connecting Fiber Optic SC-type, "Snap-In"

The following procedure applies to installations using an PM with SC-type

fiber connectors. This procedure applies to ports using an FPM-MSC, FPM-SSC single-

mode, FPM10-MSC, FPM10-SSC, FPM-SXMSC, and to SPM-FDSC and -FDSSC

single-mode.

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When connecting fiber media to SC connectors, simply snap on the two

square male connectors into the SC female jacks of the PM until it clicks and secures.

3.5 Connecting Single-Mode Fiber Optic

When using single-mode fiber cable, be sure to use single-mode

fiber port connectors. Single-mode fiber cable has a smaller diameter than multi-mode

fiber cable (9/125 microns for single-mode, 50/125 or 62.5/125 microns for multi-mode

where xx/xx are the diameters of the core and the core plus the cladding respectively).

Single-mode fiber allows full bandwidth at longer distances, and may be used to

connect 10Mb nodes up to 10 Km apart, or 15Km with the SPM-FDSSC.

The same procedures as for multi-mode fiber applies to single-m

ode fiber connectors.

Follow the steps listed in Section 3.3 and 3.4 above.

3.6 Connecting Twisted Pair (RJ-45,CAT3,

CAT5, Unshielded or Shielded)

The RJ-45 ports of the Magnum 8000X Dual-Speed Hubs can be connected to

the following two media ty

pes: 100BASE-TX and 10BASE-T. CAT 5 cables should be

used when making 100BASE-TX connections. When the ports are used as 10BASE-T

ports, CAT 3 may be used. In either case, the maximum distance for unshielded

twisted pair cabling is 100 meters (328 ft).

Media IEEE Standard Connector

Twisted Pair (CAT 3, 4, 5) 10BASE-T RJ-45

Twisted Pair (CAT 5) 100BASE-TX RJ-45

NOTE : It is recommended that high quality CAT. 5 cables (which work for both

10Mb and 100Mb) be used whenever possible in order to provide flexibility in
a mixed-speed network, since dual-speed ports are auto-sensing for either 10
and 100Mb/s.

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

100BASE-TX twisted pair segment to the RJ-45 port. The procedure is the

same for both unshielded and shielded twisted pair cables.

1. Using standard twisted pair media, insert either end of the cable with an RJ

-45

plug into the RJ-45 connector of the port. Note that, even though the connector

is shielded, either unshielded or shielded cables and wiring may be used.

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

3. Use the LINK LED to ensure proper connectivity

by noting that the LED will be

illuminated when the unit is powered and proper connection is established

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4. For Port #1, if the LINK LED is not illuminated, change to port 1X. If this does

not help, ensure that the cable is connected properly and that the device on the

other end is powered on and is not defective.

3.6.1 100Mbps Collision Domain Diameter, Cable Distances and PDV

Calculations

The 100Mbps Collision Domain Diameter is the length of the longest path

between any

two devices in a single collision domain. A collision domain is defined as

a cluster of network devices which are connected by means of a repeater or repeaters

such that no bridging devices are present between any two devices in the cluster. In

order to install an IEEE 802.3u compliant Fast Ethernet network, the collision domain .

. regardless of the actual network topology . . must be less than 512 BT (Bit Times).

Bit Times are related to media type as shown in Table 3.6.1a.

Table 3.6.1a: Worst case round-trip delay for Fast Ethernet media*

Media Type Round-trip delay in

Bit Time per Meter (BT/m)

Fiber Optic 1.000
Shielded TP cable 1.112
Category 5 Cable 1.112
Category 3, 4 Cable 1.140

*Worst case delays taken from IEEE Std 802.3u-1995, actual delays may be less for a particular
cable. Contact your cable supplier for exact cable specifications.

Each Fast Ethernet device component also has an associated BT delay which

depends on the physical signaling system employed. Table 3.6.1b shows each Fast

Ethernet device component and the associated BT delay. A “DTE” is an end node, such

as a user station. Note that there is only one DTE pair associated with any device-to-

device path.

Table 3.6.1b: Worst case round-trip delay for Fast Ethernet device components*

Component Round-trip delay in Bit Times (BT)

2 TX DTEs 100
2 FX DTEs 100
1 FX and 1 TX DTE 100
1 T4 and 1 TX or FX DTE 127
Class I Repeater 140
Class II Repeater with any

combination of TX and FX ports

92 **

**Note, the delay is only 80 Bit Times for

the 8000X, front-port-to-front-port.

*Worst case delays taken from IEEE Std 802.3u -1995.

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To determine whether a prospective network topology adheres to the collision

domain diameter specification, the following formula should be applied to the worst

case path through the network. The worst case path is the path between the two Fast

Ethernet devices (DTEs) which have the longest round-trip time.

PDV = (sum of cabling delays) + (sum of repeater delays) +

(DTE pair delay) + (safety margin)

PDV is the Path Delay Value of the worst case path. For the network to

adhere to IEEE standard, this value m

ust be less than 512 BT. The safety margin is

specified in BT and may be a value between 0 and 5. This margin can be used to

accommodate unexpected delays such as extra long patch cable. A safety margin of

about 2 to 4 BT is recommended.

A typical example of a PDV calculation is shown below, and is illustrated in

Figure 3.6.1a. Here, an integrator wishes to cascade the 100Mbps collision dom

ains of

two Magnum 8000X Mixed-Media Hubs (each having a PDV of 80 BT) for use with

standard 100m Category 5 user cable segments (i.e. from computer to hub) and needs to

know how long the inter-repeater Category 5 cable segment, used to cascade the hubs,

can be. The variable “X” represents the unknown maximum cascade cable delay.

PDV = X + ((111 + 111) + (80 + 80) + (100) + 2 ) BT < 512 BT
512 > (X + 486) BT
X < (512 - 486 ) BT, X < 28 BT
Twisted Pair cable length, TL < (28 BT) / (1.112 m/BT)
TL < 25 meters

⇒ 25 m maximum total length for Category 5 inter-repeater segment,

where 111 is the BT delay for 100m of Category 5 cable (1.112 BT/m* 100m), 80 is the

BT delay for each Magnum 8000X , 100 is the BT delay for the TX DTE pair, and a

safety margin of 2 was used. Figure 3.6.1a: Two cascaded Magnum 8000X hubs

100 m Cat. 5 cables

to user devices

100 m Cat. 5 cables

to user devices

Cat. 5 cable for

cascading

1010 0

PWR BRD

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Magnum 8000X

Mixed Media Hub

GARRETT

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R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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The resulting value tells us that a Category 5 cable with a length of up to 25

meters may be used to cascade the Magnum 8000Xs. Note that this inter-repeater cable

length may be increased by shortening the lengths of the 100m hub-to-user cable

segments.

It is also possible to cascade a group of up to nine Magnum 8000Xs (serving

up to 56 users with full-length 100m cables to each) by using short inter-repeater cable

segments. The following is an example of how to calculate the maximum allowable

cascade cable segment length. An illustration of this example is shown in Figure 3.6.1b,

where the hub-to-user cable lengths are up to 75 meters for Cat 5 twisted pair. The

variable “X”, the maximum hub-to-hub cable delay, is calculated as follows:

PDV = X + ((100) + (80 + 80 + 80 )+ (83 + 83) + 2 ) BT < 512 BT
512 > (X + 508) BT, X < 4 BT
Twisted pair user cable length, TL < (4 BT) / (1.112 m/BT)
TL < 3.6 meters for two hub-to-hub cascading cables

⇒ 2 meters (6 ft.) length max. for each of the cascade segments,

In the above example, 75 is the BT delay for 70m of Category

5 cable (1.112 BT/m), 80

is the bit time delay for each Magnum 8000X front-to-front ports, 100 is the BT delay

for the TX DTE pair in the user

stations, and 2 BT is the safety margin

applied.

Figure 3.6.1b: Multiple cascaded

Magnum 8000X

Mixed-Media hubs

Note that the cascading of multiple

Magnum 8000X Mixed-Media hubs is a

capability

beyond what industry

standards normally permit, and is different from what competitive 100Mbps Class II

hub products normally allow. This additional cascading level and cable length is due to

the relatively shorter bit time (80 BT actually measured, for front-port-to-port) delay of

the Magnum 8000X vs. the industry standard delay of 92 BT for Class II repeaters. The

installation flexibility and network growth potential is accordingly better with Magnum

8000Xs than with hubs that merely meet the standard. Table 3.6.1c shows maximum

cable lengths for common network configurations using industry standard repeater PDV

numbers. Calculations such as above should be performed using measured PDV data

supplied by the equipment manufacturer in important installations.

2 meter Cat. 5 cable

for cascadi ng

All user devices connected
via Cat. 5 twisted pair cable

of up to 75m length.

10100

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Mixed Media Hub

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R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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Magnum 8000X

Mixed Media Hub

GARRETT

1

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R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

10100

PWR BRD

ACT
COL

Magnum 8000X
Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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Table 3.6.1c: Maximum segment lengths for common network configurations

Number

of Hubs

Repeater

Hop Count

Max. User

Segment

Lengths (m)

Max. Inter-

Repeater (Cascade)

Length (m)

Notes

1 1 100.0 n.a. All ports TX
2 2 100.0 5.0 All ports TX
2 2 92.0 20.0 All ports TX

3+ 3 60.0 1.0 All ports TX

Instructions for connecting the Magnum 8000X Mixed-Media Hubs to the

various Fast Ethernet media are given in the following sections.

3.6.2 Connections to NICs which support Auto-Negotiation

The Magnum 8000X Mixed-Media Hub will function properly with NICs

(Network Interface Cards) which support Auto-Negotiation. The Magnum

8000X will

establish link with any NIC which can send and receive the Fast Link Pulse (FLP)

coding for the 100BASE-TX signaling system. When connecting a NIC to the 8000X, it

may be necessary to reload the NIC drivers on the user device if the NIC has been

communicating with a protocol other than 100BASE-TX (such as 10BASE-T). When

100Mb operation is agreed and in use, the 100Mb LINK/ACT LED is illuminated,

steady ON if no traffic or blinking when there is traffic.

3.7 Table-Top or Shelf Mounting

The Magnum 8000X fiber Hub can be easily

mounted on a table-top or any

suitable horizontal surface, and has four rubber feet to provide stability without

scratching finished surfaces.

3.8 Rack-Mounting

Installation of a

Magnum 8000X mixed-

media fiber Hub in a 19” rack is a simple procedure. The units are 1U (1.70”) high.

When properly

installed, the front-mounted LED status indicators should be in plain

view and easy to read. Rack-mount installation requires special 19” rack-mounted

brackets and screws (included with each 8000X unit). The brackets attach to the front

sides of the hub, which is then fastened into a standard 19” RETMA rack.

10100

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BRD

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Mixed Media Hub

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R L S

R L S R L

R L

R L

R LR L R L

R LR LR L

R LR L R L

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The 23” brackets and ETSI brackets are also available (optional) for Rack­mounting of Magnum 8000X Hubs. The 23” brackets are more popular in Telco
industry where they are
standard for Central Office
rack-mounting purposes. The
23” brackets are mainly used
for larger equipment
assemblies in rack-mounting
frames, and are frequently
accessed in operation from both
sides.

The ETSI (European
Telephone standard) brackets
are similar to the 19” brackets
but use metric dimensions.

The optional 23” brackets and

the ETSI brackets come as a

pair in a package, along with

the necessary screws for

attaching the brackets to the sides of the Magnum Switch unit.

Fig 3.8 Multiple Magnum 8000X

units rack-mounted in a 23”

frame

3.9 Port Module (PM) Installation

The Magnum 8000X is normally received from the factory with all required

PM modules installed. There may

be situations where PM cards need to be added or

replaced. In cases where additional PM cards are needed, the face plate for an available

front-mounted slot must be removed. The following procedure describes this operation.

3.9.1 Preparation for Installing and Removing PMs

Caution- Avoid Static Discharge: The port modules (like most electronic

equipment) are sensitive to static discharge. Use proper ESD measures

when handling port modules.

STOP!!!

Be sure the power cord is unplugged

from the chassis before attempting to remove

and/or replace any PM cards.

Failure to do so may result in damage to the unit

and will void the warranty.

10 100

PWR

BRD

ACT

COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R LR LR L R L

R LR LR L

R LR L R L

10 100

PWR

BRD

ACT

COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R LR LR L R L

R LR LR L

R LR L R L

10 100

PWR

BRD

ACT

COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R LR LR L R L

R LR LR L

R LR L R L

10 100

PWR

BRD

ACT

COL

Magnum 8000X

Mixed Media Hub

GARRETT

1

R L SR L S

R L S

R L S R L

R L

R LR LR L R L

R LR LR L

R LR L R L

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Step 1. Remove Chassis Cover

To make the installation of port module easy, the top cover is made in two

parts called “front-top” and “rear-top”. There are 6 screws located on front-

top of the unit and two screws each on the left and right edges. Remove these

screws. Once these are removed, the front-top cover is easily lifted off the

chassis base.

When the front-top cover has been removed, the front-interior is exposed.

Figure 3.9.1a: Removing Chassis Cover

Caution: Be careful not to disturb the power supply.

Looking down into the Magnum 8000X unit, notice that there are individual

PM connector sockets for each PM card position. There are 16 PM slots located on the

front of the unit and a bonus slot for an SPM in the rear of the unit. A total of seventeen

slots for seventeen Ethernet segment connections are available. The extreme left

header-position in front is used by the LED Status module. (See Figure 3.9.1b).

Figure 3.9.1b: Magnum 8000X, Top View with Chassis Cover

10100

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Front-topChassis Cover

10 Phillips Head

Screws on Front-top

Front of Unit

Inter-Repeater Bus

Power Input

Sixteen PM Slots

Back of Unit

Right
Side

Left
Side

SPM Bonus Slot

Cooling Fan

Power Supply Board

Bridge

LED Status Slot

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Step 2. Remove bottom-front Retaining Screws in any PM or Face Plates

On the bottom-front of the unit, there is one retaining screw for each PM card slot.

These screws are used to secure a PM face plate in position. These screws are also used

to secure the individual PM cards, which can be subjected to significant forces from the

attached cables. (See Figure 3.9.1c)

Figure 3.9.1c: Front View - PM Retaining Screws hold Face Plates

PM card installation is covered in Section 3.9.2. PM card removal is covered in

S

ect.3.9.3.

3.9.2 Installing PM Cards in the Magnum 8000X

Up to sixteen front-mounted PM cards may be installed in one Magnum

8000X Fiber Hub unit. Follow these steps to install a PM.

Step 1. Remove front-top chassis cover. See procedure in Section 3.9.1 above.

Step 2. The figure here

illustrates the basic

lay

out of an

individual PM card.

Each PM card fits

into the selected PM

connector socket

slot. Align the

BOTTOM-Front PM
Retaining Screws

10100

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Magnum 8000X

Mixed Media Hub

GARRETT

1

Bottom PM Retaining

Screw Hole

Ten(10) Pin

PM Connector

(inserts into main board

)

Printed Circuit card

FRONT

TOP

LED

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connector pins on the bottom of the PM card with the connector socket inside

the unit. The pins are slightly angled to facilitate the installation. (Do NOT

straighten the pins before insertion !!)

Step 3. Be sure the pins are precisely aligned with the holes in the header, and the

PM front panel is guided into the front slot cut-out. Then, slowly and

carefully apply enough pressure to insert the PM card’s pins into position,

see Figure 3.9.2b. (If you force the PM down when the pins are not properly

aligned with the holes in the header, the pins will become bent and the PM is

damaged).

Once inserted, the PM card will be secured by the header connector,

the front panel port slot cut-out, and retaining screws.

NOTE: If a PM is difficult to install, try it in another port slot. Some of the

port modules may fit easily in one port slot and be very hard to install in

another.

Figure 3.9.2b: Inserting PM Cards into a Magnum 8000X

NOTE: All PM slots need not be filled in order for the Magnum 8000X unit

to be operational. When leaving PM slots empty, always use a face plate
(M

agnum PM-FP) to cover the slot opening in the front panel. This will
maintain proper cooling air flow, safety, and operation as required by
FCC, CE, and other regulations.

Step 4. Once all P

M cards have been installed (including face plates for empty slots),

the chassis cover should be replaced.

3.9.3 Removing PM Cards

To properly remove a PM card from the Fiber Hub, follow the 3 steps below.

Step 1. Remove chassis cover See procedure in Section 3.9.1 above.

Caution: Be sure the power cord is unplugged.

Step 2. Remove bottom-front retaining screws for the PM and Face Plate

10100

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Magnum 8000X

Mixed Media Hub

GARRETT

1

PM CARDS

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On the bottom-front of the unit there is one retaining screws for each PM card

and face plate slot. These screws are used to secure a PM card in position (see

Figure 3.9.3a). Remove the front screws of the PM to be removed.

Figure 3.9.3a: Front View - Face Plate & PM Retaining Screws

Step 3. Remove PM Card

Gently pull the PM card up and out of the connector socket (see Figure

3.9.3b).

Figure 3.9.3b: Removing a PM Card

If the slot from which the PM card has been removed is to remain unused, be

s

ure to install a PM face plate cover in it. If another PM card is replacing the

one that has been removed, follow the steps as described for installing an PM

card discussed in Section 3.9.1.

3.10 Preparation for Installing and Removing SPMs

Step 1. Remove Chassis Top Cover

Caution: Be sure the power cord is unplugged.

The 8000X chassis is connected with 20 screws on the top cover. There are

several screws located on top front and back of the unit, and four screws each

on the top left and right sides. Remove these 20 screws from the top edges.

Once these are removed, the top cover is easily lifted off the chassis base.

BOTTOM-Front PM
Retaining Screws

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Mixed Media Hub

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When the

chassis top cover

has been removed,

the interior of the

unit is exposed.

Figure 3.10a: Removing Chassis Cover

Caution: Be sure the power cord is unplugged.

Caution: Be careful not to disturb the power supply.

Looking down into the Magnum 8000X unit, notice that there is one SPM

connector header located on the rear part of the main board. (See Figure 3.10b).

Figure 3.10b: Magnum 8000X, Top View with Chassis Cover Off

Step 2. Remove Retaining Screws in Face Plates of SPM Bonus Port

On the rear side of the unit there are two retaining screws for Bonus Port slot.

These screws are used to secure an SPM face plate in position. These screws are also

used to secure the SPM modules, which can be subjected to significant forces from the

attached cables. (See Figure 3.10c)

Figure 3.10c: Rear View - SPM Retaining Screws in Face Plates

10100

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Mixed Media Hub

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TopChassis Cover

20 Phillips Head

Screws on Top

Front of Unit

Media Connector

with electronic elements

Inter-Repeater Bus

AC Power Input

Sixteen PM Slots

Back of Unit

Right
Side

Left
Side

SPM Bonus Slot

Cooling Fan

Power Supply Board

Bridge

Inter-Repeater Bus (IRB)
P3 - Interface to unit above.
P4 - Interface to unit below.

AC Power
Connector

Bonus Port Slot,

1 8

OUT

IN

ON

OFF

Screw Holding the SPM face plate

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SPM card installation is covered in Section 3.10.1, PM card removal in Sect3.10.2.

3.10.1 Installing an SPM Module in the Magnum 8000X

There is only one SPM module may be installed in the Magnum 8000X Fiber

Hub unit. The SPM bonus port slot is accessible on the rear of the unit

Follow these steps to install an SPM.

Step 1. Remove top chassis cover. See procedure in Section 3.10a above.

Step 2. The figure 3.10.1a below illustrates the lay

out of an SPM module installed in

a 8000X unit. The SPM module fits easily into the SPM header.

Fig. 3.10.1a Top View : SPM Module Installed in a 8000X

Align the 40-pin male header on the main board of the Magnum 8000X with

the female sockets on the SPM module carefully. Any misalignment of the

pins will prevent proper functioning of the SPM module.

Step 3. Slowly and firmly push the SPM into position. Once inserted, the SPM card

is then secured by the header connector. Re-insert the retaining screws on the

SPM module cover plate to provide stability .

NOTE: The SPM Bonus Port slot need not be populated in order for the
Magnum 8000X unit to be operational. When leaving SPM slots empty, always
use a face plate (supplied and factory-installed in all non-SPM units)) to cover
the slot opening in the rear panel. This will maintain proper cooling air flow for
safety, and operation as required by FCC, CE, and other regulations.

Step 4. Once S

PM card has been installed, the user can adjust the jumper settings

either to half or full duplex. The SPM module, by default, comes with half-

duplex settings. Finally the chassis cover should be replaced and screwed

down.

Inter-Repeater Bus

AC Power Input

Sixteen PM Slots

Back of Unit

Front of Unit

Right
Side

Left
Side

SPM Bonus Slot

Cooling Fan

Power Supp ly Board

SPM Module installed

Jumper Settings For Half/Full duplex

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Note: Do not use any other screws(except provided from the factor on the fan side.

Non-standard screws may stop the fan from working, and the heat build-up may

cause serious hazard to the unit.

3.10.2 Removing an SPM Bonus Port Module

To properly remove an SPM module from the Magnum 8000X Stackable

Concentrator follow the three steps below.

Step 1. Remove chassis cover

See procedure in Section 3.10 above.

Caution: Be sure the power cord is unplugged.

Step 2. Remove retaining screws for the SPM, face-plate only

On the rear side of the hub there are two retaining screws for the Bonus Port

slot. These are used to secure an SPM m

odule in position. Remove them.

Step 3. Remove SPM Card

Keep the face-plate screws available. Gently pull the SPM card up and out of

the connector header . If the bonus port from which the SPM card has been

rem

oved is to remain unused, be sure to install an SPM face plate cover in it.

If another SPM card is replacing the one that has been removed, follow the

steps as described for installing an SPM card discussed in Section 3.10 on the

preceding pages.

3.11 Powering the Magnum 8000X

The Magnum 8000X incorporates an internal universal power supply, and has

a male IEC connector for the AC power cord at the right-rear. A six foot 115vac power

MAIN BOARD

SPM

MODULE

POWER

SUPPL Y

STAC KING

CONNECTORS

Retaining
Screws

Fan

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cord is supplied with each unit. (Units shipped from the GCI factory to outside the

United States and Canada will not include a 115 vac power cord.)

The Magnum 8000X supports installation environments where the AC

voltage ranges from 90 - 260 volts with a power input frequency of between 47 - 63 Hz

and will consume no more than a maximum of 30 watts. The power connector is located

on the back of the unit. In order to power down the unit, simply unplug the unit’s power

cable In a stacked configuration, this will NOT affect the operation of other units in the

stack. When connecting various Ethernet media, there is no need to power down the

8000X unit. Individual segments of any media type can be connected or disconnected

from PMs without concern for AC power -related problems or damage to the unit.

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4.0 Operation

The operation of the Magnum 8000X is described in this section.

4.1 Repeater Functionality

The Magnum 8000X operates as a Mixed-Media Ethernet Hub to support
m

ultiple port segments within two (10 and 100Mbps) collision domains. The

following describes the basic functionality of the Magnum 8000X Fiber Hub.

1. Repeater Functions: Each front port operates in conjunction with the
controller functions of the 8000X chassis as a fully

compliant Ethernet repeater.

The entire hub (or a stack of multiple units) counts as one Dual-Speed repeater.

2. Collisions: W

hen a collision is detected at a port other than the original
receiving port, it generates a jam pattern to the other ports in that domain.
When a collision signal is detected at a receiving port, it generates a jam pattern
to the other ports. The sequence of jam signals depends on the sequence and
location of collisions.

3. Partitioning and Re-connection: An Magnum

8000X will automatically
disconnect (partition) any segment (port) when 64 consecutive collisions occur
or after 6.5 ms of continuous transmissions. Network integrity is checked every
800 ms and segment (port) reconnection occurs after a 512-bit packet is
transmitted without error.

4. Link Status: The Magnum 8000X PMs indicate link integrity for fiber

optic and twisted pair segments. LINK is normally lit. Broken cables or a
loss of power at any point in such segments will turn off the LINK LED.

4.2 Dual-Speed Functionality

The Magnum 8000X handles the two different traffic domains separately

. The

8000X provides switched (bridged) connectivity between the Ethernet (10 Mbps) and

Fast Ethernet (100Mbps) domains. It joins the two network domains for unified

operation, and filters/ forwards packets in both directions to maximize bandwidth

utilization and performance. Magnum 8000Xs are hardware plug-and-play devices.

There is no software set-up to be done at installation or for maintenance. The functions

of the Magnum 8000X are described in this manual.

Each time a packet is received on one domain of the bridge module, the decision is

taken to either to filter or forward the packet. Errored packets are alway

s filtered. For

good packets, the filter and forward decisions are made based on the destination address

contained in each packet. If the destination address is on the same domain from which

the packet originated, then it is filtered and not forwarded to the other domain. If the

destination address is not found to be a match in the address table for the originating

domain, then it is forwarded to the other domain. If it is a new node address coming in

which the switch did not previously know about, it “learns” the new address and puts it

in the correct port address table. See “Address Learning” for more details. This

diagram below shows the filter / forward logic for both domains.

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1. Address Learning (Address Table Maintenance)

The Magnum 8000X bridge module is a state machine design which has a total

address table capacity of 8K addresses. With a large address table, a Magnum 8000X

can serve the needs of a medium-sized to large network. Table 4.2 shows what filter /

forward action the Magnum 8000X will take in each packet-processing situation, and

when a new node address will be added to the internal Address Table. When a new

node-address packet comes into a port for the first time, then the new source address is

“learned” at the same time that the packet is forwarded. After learning, subsequent

packets from the same node address are routinely processed. The address tables are

flushed periodically to update the network status and to purge any inactive stations from

the tables of both domains.

Figure 4.2 : Filtering vs. Forwarding in Dual Speed 8000X
Packet Source Destination Address Table Filter/Forward
Source Address Address Maintenance Action

10 Mbps Not in table Not in table Add source to table Forward
10 Mbps Not in table In table Add source to table Filter
10 Mbps In table Not in table None Forward
10 Mbps In table In table None Filter
100Mbps Not in table Not in table Add source to table Forward
100Mbps Not in table In table Add source to table Filter
100Mbps In table Not in table None Forward
100Mbps In table In table None Filter

Table 4.2: 8000X Dual-Speed Hub Functionality

2. Throughput Increase

By selectively forwarding packets from each domain to the other domain
based on its switching (bridging) logic, the Magnum 8000X increases the available
bandwidth for the users on both sides of the network. As shown in Figure 4.2, it keeps
the local traffic on each side contained, preventing unnecessary

packets and bad packets

from traveling to the other domain and using up bandwidth needlessly over there. This

Bridge Module

100 Mb Traffic

100Mb Domain : 100Mb packets are
filter ed when the destination address is

in the 100Mb domain address table.

100Mb Domain : 100Mb packets are
forwarded when the destination address is
NOT

in the 100Mb domain address tabl e.

10 Mb Domain 100 Mb Domain

10Mb Domain : 10Mb packets are
forwarded when the destination addresse is
NOT

in the 10Mb domain address table.

10Mb Domain : 10Mb packets are
filt ered when the destination address is

in the 10Mb domain address tabl e.

10 Mb Traffic

10 BUS 100

1

0

B

U

S

1

0

0

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results in more available network bandwidth on both sides and a throughput increase on
for all users on both domains.

3. Software Transparency

The Magnum 8000X Dual-Speed Hubs need no software set-up and are transparent

to sy

stem and application software, including network management software.

4.3 Auto-negotiation and speed-sensing

The PM-RJ45 and PM-RJ45U ports independently

support auto-negotiation

for shared 10BASE-T and 100BASE-TX modes. When the ‘S’ LED is flashing on a

port, it means that the hub is sending out auto-negotiation pulses on that port. When a

LINK connection is initially made, the other device should respond and both sides

should agree on the speed capability being signaled. The device connected, depending

on what it is, will either signal that it is capable of 10 Mbps or 100Mbps speeds.

Silence means the port defaults to 10 Mbps.

When the ‘S’ LED is steady

ON, the port has auto-negotiated for 100Mbps

operation and is running at 100Mbps. When it is steady OFF, it is at 10 Mbps. If a

8000X copper port is connected to a non-negotiating device, it will default to 10 Mbps

speed. Since Magnum 8000Xs are hubs, front ports always operate in half-duplex

mode.

General information -

Auto-negotiation per-port for dual-speed hubs occurs when:

the devices at both ends of the cable are capable of operation at either 10Mb or

100Mb speed, and can send/receive auto-negotiation pulses, and . . .

-- when the second of the two connected devices is powered up*, i.e., when LINK

is established for a port, or

-- when LINK is re-established on a port after being lost temporarily.

NOTE

– some NIC cards only auto-negotiate when the computer system that they are

in is powered up. These are exceptions to the “negotiate at LINK – enabled” rule, but
may be occasionally encountered

.

4.4 Chassis LEDs

The Magnum 8000X is equipped with six LEDs located on the front of the
chassis unit (see Figure 2.3b). These LEDs are Power (PWR), Bridge(BRD), Collision
(COL) and Activity (ACT) for 10 and 100Mbps speed. They are used to provide visual
indication about the operational condition and traffic activity of the 8000X unit and its
associated PM cards.

Magnum 8000X chassis unit LEDs

LED Description
PWR Illuminates GREEN to indicate that the unit is receiving power.
BR GREEN, Steady ON, unit has bridge inside
COL Flashes YELLOW to indicate a collision, one each for 10 and 100Mbps
ACT Flashes for packet activity, one each for 10 and 100Mbps domains

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4.5 Power Budget Calculations for 8000X FPM’s and Fiber Media

Receiver Sensitivity and Transmitter Power are the parameters necessary to

compute the power budget. To calculate the power budget of different fiber media
installations using Magnum products, the following equations should be used:

OPB (Optical Power Budget) = P

T

(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

µm (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
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

µm

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-

mode

2

(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-

m

ode

10

(5)

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

FPM-

MST, MSC

100Mb

FX

Multi-

m

ode

2

(0.4)

1300

62.5/125

50/125

-20

-23.5

-31

-31

9.0

5.5

2.5

2.0

14

12

5

4

FPM-SSC

100Mb

FX

Single-

m

ode

18+

(0.4)

1300 9/125 -15 -31 14 28 17.5 35

FPM-MTRJ

100Mb

FX

Multi-

m

ode

2

(0.4)

1300

62.5/125

50/125

-20

-23.5

-31

-31

9.0

5.5

3.0

2.0

15.8

12.2

5.5

4.0

FPM-MV45

100Mb

FX

Multi-

m

ode

2

(0.4)

1300 62.5/125 -14 -31 15 5 16 5.7

FPM-SX

MST, MSC

10/100

Mb SX

Multi-

mode

0.3

(0.3)

850 62.5/125 -12 -15 1 0.3 1.5 0.5

SPM-FDST

SPM-FDSC

100Mb

FX

Multi-

m

ode

2

(n.a.)

1300

62.5/125

50/125

-20

-23.5

-31

-31

9.0

5.5

2.5

2.0

14

12

5

4

* Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed

over long distances (i.e., over approx. 400 meters) can be achieved only if the
following factors are both applied:

• The 100Mb fiber segment must operate in full-duplex (FDX) mode, i.e. an

SPM (or equal external unit such as 300ES-FDX) must be used, and

• The worst-case OPB of the fiber link must be greater than the fiber cable’s

passive Attenuation.

(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)

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5.0 Introduction - Magnum 8000X Port Modules

This chapter describes each Port Module (PM), including appearance,

functionality, and status displays.

5.1 Inspecting the Package and Product

This section applies only to PMs shipped as separate items, i.e., PMs not

factory

installed in a Magnum 8000X PM slot or in bonus port slot.

Examine the shipping container for obvious damage prior to installing a PM;

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:

One or more PMs.

Remove the PM(s) from the shipping container. Be sure to keep the shipping

container should you need to ship any of the PMs separately 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 if possible. Refer to

Chapter 5 for specific return procedures.

5.2 Product Description

An important feature of the Magnum 8000X Hub is the use of individual Port

Modules (PMs) for flexible mixed-media connectivity to RJ-45 and fiber

media. Since the Magnum 8000X’s have dual-speed capability per-port, the

front port slots are designed to support all standard Ethernet media types at 10

or 100Mps speed. Each PM provides one port for connecting one Ethernet

segment with its individual connector type and media.

For a list and brief illustration of Port Module ty

pes, refer to Section 2.4

Each PM is individually described in the following sections.

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5.2.1 FPM-MST, 100Mbps multi-mode FX-ST-type, “twist-lock” connector

The Magnum FPM-MST is a

multi-mode 100Mbps fiber optic module

equipped with a dual ST-type connector. It

functions as a fiber optics transceiver to

support 100BASE-FX network segments.

When installed in an 8000X half-duplex

hub, it supports fiber optic cable distances

only up the IEEE-specified 100Mbps

shared-collision-domain distance limits,

i.e., typically 200 meters.

The module is equipped with an Activity (A) LED, and a Link (L) LED

which indicates proper connectivity with the remote device when lit. Lettering on the

front of the module identifies it as “100 FX” to avoid confusion with other similar-

looking FPMs.

5.2.1a FPM10-MST, 10 Mbps multi-mode FL-ST-type, “twist-lock” connector

The Magnum FPM10-MST is a multi-mode 10 Mbps fiber optic module

equipped with a dual ST-type connector. It looks similar to the 100Mb FPM-MST, but

has the lettering “10 Mb” on the front to distinguish it.

5.2.2 FPM-MSC 100Mbps multi-mode FX

-SC-type, “snap-in” connector

The Magnum FPM-MSC is also

a multi-mode 100Mbps fiber optic

transceiver module, similar to the FPM-

MST. It has the same LEDs indicating port

activity (A), and Link (L) operational, and

the same face-plate lettering.

While the functionality of the

these two modules is the same, the FPM-

MSC is equipped with an SC-ty

pe "snap-

in" connector instead of an ST-type.

1

ACTIVITY

LINK

2

100BASE-FX, -SX and 10BASE-FL

ST Connectors

1

2

A L

1

ACTIVITY

LINK

2

100BASE-FX, -SX and 10BASE-FL

SC Connectors

1

2

A L

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5.2.2a FPM10-MSC, 10 Mbps multi-mode FL-SC-type, “snap-in” connector

The Magnum FPM10-MSC is a multi-mode 10 Mbps fiber optic module

equipped with a dual SC-type connector. It looks the same as the 100Mb FPM-MSC,

but has lettering “10 Mb” on the front to distinguish it.

5.2.3 FPM-SSC 100Mbps single-mode FX

-SC-type, “snap-in” connector

The Magnum FPM-SSC is a single-mode 100Mbps fiber optic module

equipped with a dual SC-type connector. It functions as a full fiber optic transceiver to

support single-mode fiber

networks.

The FPM-SSC, when

installed in a Magnum 8000X

hub, supports fiber distances the

same as 100Mbps multi-mode

ports because of the 100Mbps

collision domain limitations, so

it is only practical for use where

single-mode fiber cable is

already installed and must be used.

Note - to support long fiber distance with the Magnum 8000X, use either

10Mbps modules in front ports (which can go up to 2Km), or use a 100Mbps full-

duplex SPM in the bonus port which has no collision dom

ain limits.

The FPM-SSC is equipped with an Activity

(A) LED, and LINK(L) LEDs

identical to those of the FPM-MSC. To distinguish the single-mode FPM-SSC from the

multi-mode FPM-MSC, the label “Sgl. M.” is at the top of the faceplate of the FPM-

SSC.

5.2.3a FPM10-SSC, 10Mbps single-mode FL-SC-type, “snap-in” connector

The Magnum FPM10-SSC is a single-mode 10 Mbps fiber optic module equipped with

a dual SC-type connector. It looks the same as the 100Mbps FPM-SSC, but has

lettering “10 Mbps” on the front to distinguish it.

1

ACTIVITY

LINK

2

100BASE-FX, 10BASEFL sgl.mode

SC Connectors

1

2

A L

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5.2.3b FPM10-SST, 10Mbps single-mode FL-ST-type, “twist-lock” connector

The Magnum FPM10-SST is a single-mode 10 Mbps fiber optic module equipped with

a dual ST-type connector. To distinguish the single-mode FPM10-SST from the multi-

mode FPM10-MST, the label “Sgl. M.” is at the top of the faceplate of the FPM10-SST.

5.2.4 FPM-MTRJ, 100Mb multi-mode FX, MTRJ small-form-factor

connector

Magnum FPM-MTRJ is a multi-mode fiber optic module equipped with a

small-form-factor MTRJ-type connector. It looks almost like an RJ-45 port, but it is

black in color. The MT-RJ’s small size and

ease of connection make it a good choice for

100Mbps “fiber-to-the-desktop” Ethernet

connectivity. When installed in an 8000X

half-duplex hub, it supports fiber optic cable

distances only up the 100Mbps shared-

collision-domain distance limits, i.e., typically

200 meters.

The functionality of this 100BASE-

FX multi-mode FPM is same as the ST and

SC-types, and it is equipped with the same

ACTIVITY (A) and LINK (L) LEDs to indicate proper connectivity with the remote

device. It has the same “100Mb FX” lettering on the faceplate. Note that the other end

of the fiber cable may have a different connector, not necessarily an MT-RJ type.

5.2.5 FPM-MV45, 100Mbps multi-mode FX, VF-45 small-form-factor

connector

Magnum FPM-MV45 is a multi-mode fiber

FX “small-form-factor” VF-45 connector used primarily

in 100Mbps fiber-to-the-desktop links. Its size is

similar to the MT-RJ port, but the VF-45 shell is

slightly larger. When not in use, its appearance is

distinctive because it has a tiny hinged door over the

port hole to act as a dust cover.

A L

1

2

100BASE-FX MT-RJ

Connector

1

ACTIVITY

2

LIN

K

“small-form-factor”

1

2

1

ACTIVITY

2

LINK

LINK

100BASE-FX MV-45

Connector

“small-form-

”

A L

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When installed in a Magnum 8000X half-duplex hub, it supports fiber optic

cable distances only up the 100Mbps shared-collision-domain distance limits, i.e.,

typically 200 meters.

The small size, about the same as an RJ-45, reduces the size of wiring panels

in wiring closets while providing the advantage of “future-proof” fiber optic

technology.

The cable port is a “plug-in” connector, with both fiber strands terminated in

one housing that cannot be improperly

inserted. The module is equipped with a LINK

(L) LED to indicate proper connectivity with the remote device, and an ACTIVITY (A)

LED that flashes to show when Fast Ethernet packets are being received.

5.2.6 FPM-SXMST and SXMSC (100BASE-SX) when available !!

The FPM-SXMST port module,

better known as “short wavelength Fast

Ethernet,” looks essentially

identical to other

ST and SC connectors. The FPM-SXMST

based on 870 nm wavelength comes in multi-

mode only, and may eventually become a

cheaper solution for Fast Ethernet fiber-to-

the-desktop segments.

FPM-SXMST supports fiber

transmission connectivity

up to 300m distance is suitable for the users requiring higher

bandwidth in their LANs.

However, the connection of fiber

cable to the FPM-SXMST is the same as other

ST-ty

pe “Twist-lock” connectors. The module

is equipped with Activity(A) and Link(L)

LEDs to indicate proper connectivity with the

remote device.

As an additional indicator, a multi-

m

ode SX port emits light (red in color) that is

in the visible spectrum and which can be seen

by looking into the port with the power on

1

100BASE-SX with ST

Connectors

2

1

ACTIVITY

LINK

2

SX “short wavelength”

A L

1

ACTIVITY

LINK

2

100BASE-SX, with

SC Connectors

1

2

A L

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and with no cable connected. The FX port emits light outside of the visible spectrum

and will always look dark to the human eye.

5.2.7 PM-RJ45 and RJ45U (Twisted Pair)

The PM-RJ45 card supports Ethernet twisted pair segments of any standard

length. It is equipped with a single RJ-45 connector and an Auto/100 switch. The RJ-45

connector is shielded to minimize emissions and will allow both unshielded twisted pair

(UTP) and shielded twisted pair (STP) cable connections. The Auto/100 switch is

provided for user selection between operation in the auto-negotiation mode (Auto) or

fixed-at-100Mb (100) with no auto-negotiation and no 10 Mbps.

The PM-RJ45U module is equipped with a Media Dependent Interface-

Crossover (MDI-X) push switch to allow for cas

caded connections. This feature

eliminates the need for a special twisted

pair crossover cable.

With the switch in the IN

position, the PM-TP port is used for

cascaded and up-link connections (i.e.: a

connection to another repeater or hub or

concentrator typically.) When used for

segments going to workstations and

other user device connections, the MDI-

X switch should be in the OUT position.

The PM-RJ45 will support 10BASE-T unshielded twisted pair wiring (UTP)

environments with maximum segment distances up to 100m (325 ft.), or shielded

twisted pair wiring (STP) of 150m (500 ft.). This module is designed with internal

transceiver functionality

. The PM-RJ45 has ACTIVITY, LINK and SPEED LEDs.

Important Note: For the PM-RJ45U Crossover Switch -

OUT for workstations and user connections.
IN for Up-Link connections to other hubs, etc.

The RJ-45 pins normally (TP crossover switch DOWN) are per the
standard for hubs-to-users twisted pair wiring: 1 = receive+, 2 = receive-,
3 = transmit+, 6 = transmit-, other pins not used. When the TP crossover
switch is UP, the pins of the RJ-45 port are per the standard for up-links
using twisted pair wiring, i.e., the transmit and the receive pairs are
exchanged: 1 = transmit+, 2 = transmit-, 3 = receive+, 6 = receive-, other
pins not used.

1

ACTIVITY

SPEED

2

3

LIN

K

Shielded RJ-45

Connector

Auto/100 Switch

1

2

3

RJ45U

Cross-Over

Push Switch

PM-RJ45U

1

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5.2.8 PM-FP

The PM-FP is a blank face plate

that must be installed in any empty PM slot.

When the Magnum 8000X chassis contains

less than twelve front-mounted PMs, the

empty front slots must be covered with the PM-FP face plate PM-FP

in order to maintain proper cooling air flow, and for safety, etc.

Note:

The PM-FP

must be installed in

each em

pty

PM slot.

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6.0 TROUBLESHOOTING

All Magnum Ethernet products are designed to provide reliability and

consistently high performance in all network environments. The installation of

Magnum 8000X Mixed-Media Fiber Hub is a straightforward procedure (see

INSTALLATION, Section 2.6); 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 8000X Mixed-Media Fiber

Hub is not performing as expected, do not attempt to repair the unit; instead contact

your supplier for assistance or contact GarrettCom Customer Support.

6.1 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.

2. 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

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

8000X Mixed-Media Fiber Hub 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 8000X

Mixed-Media Fiber Hub 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 8000X Mixed-Media

Fiber Hub and its associated cables are functioning properly.

5. If the problem continues after completing Step 4 above, contact y

our supplier

of the Magnum 8000X Mixed-Media Fiber Hub unit or if unknown, contact

GarrettCom, Inc.by fax, phone or email ([e-mail]) for assistance.

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6.2 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, term

inals 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 occurrence of the problem. Any changes to system administration

procedures should all be noted in this record.

6.3 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 warranty­repaired 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.

6.4 Shipping 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 y

our return shipping charges.

4. S

hip the package to:

GarrettCom, Inc.

47823 Westinghouse Drive

Fremont, CA 94539

Attn.: Customer Service

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 warra

nty repair which turns out not to be

faulty.

Please complete the warranty card as this acts as a product registration,

and ma

il it to GarrettCom within two weeks of your purchase.

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APPENDIX B : Internal DC Power Supply Option

B1.0 SPECIFICATIONS - FOR MAGNUM MIXED -MEDIA 8000X HUBS

Power Supply (Internal -48 VDC Option)

DC Power Connector: 3 terminals: “

-“, “GND”, “+”

Input Voltage: 36 - 70 VDC
Power Consumption: Model 8000X: 30 watt typical, 50 watts max.

Power Supply (Internal 24 VDC Option)

DC Power Connector: 3 terminals: “

-“, “GND”, “+”

Input Voltage: 20-36 VDC
Power Consumption: Model 8000X: 30 watt typical, 50 watts max.

Power Supply (Internal 125 VDC Option)

DC Power Connector: 3 terminals: “

-“, “GND”, “+”

Input Voltage: 120 - 160 VDC
Power Consumption: Model 8000X: 30 watt typical, 50 watts max.

With the

exception of the power supply, all specifications and functions of

Magnum 8000X-48VDC models are identical to those listed in the main manual.

B2.0 -48VDC, 24VDC & 125VDC POWER OPTION, THEORY OF OPERATION

The -48VDC, 24VDC & 125VDC power options are designed using diodes

inside on each DC power input line

behind the two external power

connection term

inals, so that the power

from an external source can only flow

into the unit. This allows the 8000X to

operate only whenever DC power is

correctly applied to the two inputs. It protects the 8000X from incorrect DC input

connections. An incorrect polarity connection, for example, will neither affect the

8000X, its internal power supply, nor will it blow the fuse in the internal power supply.

The manual power “On-Off” Switch (optional) is used for powering the unit

on and off when it is

placed into or taken out of service.

B3.0 APPLICATIONS FOR DC POWERED ETHERNET HUBS

Magnum 8000X’s are easily installed in a variety

of applications where ­48VDC, 24VDC & 125VDC power is used as the primary power source. The- 48VDC,
24VDC & 125VDC power configuration provides an Ethernet networking solution
utilizing a special power supply in hubs with a proven track record.

The –48VDC solution is particularly useful in the telecom

munication
industry, where it is common for facilities to operate on -48VDC power. Such
companies include regular and wireless telephone service providers, Internet Service
Providers (ISPs) and other communication companies. In addition, many high

A+

A-

GND

GND

CHASSIS

FUSE

+

-

SUPPLY

HUB

POWER SWITCH

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availability equipment services, such as broadcasters, publishers, newspaper operations,
brokerage firms and other facilities often use a battery backup system to maintain
operations in the event of a power failure. It is also frequently used for computer system
backup, management and operations monitoring equipment.
The 24VDC & 125VDC solution are particularly useful in the Industrial environment,
where it is common for facilities to operate on 24VDC or 125VDC power. The
125VDC solution is mainly used in power utilities, such as electrical substations,
electrical generating plants, etc. The 24VDC applications are mainly in the Industrial
environment, such as factory floor, HVAC equipment, military equipment, etc.

B4.0 INSTALLATION

This section describes the

installation of the -48 VDC, 24VDC &

125VDC power s

ource leads to the -48

VDC, 24VDC & 125VDC power terminal

block on the Magnum 8000X. (see figure at

the right).

Figure B4.1: -48VDC Terminal Block on Magnum 8000X -48VDC

In this picture, the -48VDC terminal block on the Magnum 8000X is located

on the rear of the unit and is equipped with three (3) screw-down lead posts. It is

similar for 24VDC and 125VDC options on the 8000X. The leads are identified as

negative (-), positive (+), and chassis ground (GND).

The actual connection procedure is very straightforward. Simply connect the

leads to the Magnum

unit, beginning with ground. Ensure that each lead is securely

tightened.

Note: The GND should be hooked up first. The 8000X unit has a floating ground, so
th

e user may elect to Ground either + or = terminal to suit the customer’s use.

Before connecting hot lines to the Terminal Block of –48VDC, 24VDC or
125VDC, always use a digital voltmeter to measure the output voltage of the power
supply and determine the lead which is more “+

ve potential”. The more “+ve”

voltage lead from 48V or –48V supply must be connected to the post labeled “+”.

An ON-OFF manual switch is optional for DC power. This can be used to cut off power

connections, and as a RESET for the Hub.

B4.1 UL Requirements

1. Minimum 14 AWG cable for connection to a Centralized DC power source.

2. Fastening torque of the lugs on the terminal block: 9 inch pound max.

3. Centralized DC Power Source cable securement, use at least four cable ties

to secure the cable to the rack at least 4 inches apart with the first one

located within 6 inches of the terminal block.

36-70VDC

_

+

GND

ON

OFF

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B5.0 OPERATION

Operation of the Magnum 8000X with the optional -48VDC, 24VDC &

125VDC power supply is identical to that of the AC-powered models.

B6.0 ORDERING INFORMATION

To order the optional –48VDC power supply factory installed, add a suffix of

“-48VDC” after the product’s standard model # Example: Magnum 8000X

-48VDC.

Similarly, to order the optional 24VDC or 125VDC industrial specific power

supply

factory installed, add a suffix of “–24VDC or “–125VDC” after the product’s

standard model #. Example: Magnum 8000X-24VDC or Magnum 8000X-125VDC.

B7.0 TROUBLESHOOTING P

lease refer to Section 6.0

APPENDIX C: Internal DC Dual-Source Power Option

C1.0 SPECIFICATIONS - FOR 8000X MIXED-MEDIA FIBER HUBS

Power Supply (Internal, -48VDC Dual-Source, model # Dual-Src48V)

DC Power Connector: First Source: “A+”, “A-“, 2nd Source “B-“, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 36 - 70 VDC
Power Consumption: Model 8000X: 30 watt typical, 50 watts max.

Power Supply (Internal, 24VDC Dual-Source, model # Dual-Src24V)

DC Power Connector: First Source: “A+”, “A

-“, 2nd Source “B-“, “B+”

GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 20 - 36 VDC

Power Consumption: Model 8000X: 30 watt ty

pical, 50 watts max.

Power Supply (Internal, 125VDC Dual-Source, model # Dual-Src125V)

DC Power Connector: First Source: “A+”, “A-“, 2nd Source “B-“, “B+”
GND: Terminal for “earth” or ground wire connection to the hub chassis
Input: Two separate sources, each at 120 - 160 VDC

Power Consumption: Model 8000X: 30 watt ty

pical, 50 watts max.

With the exception of the dual DC input power connections and the power
supply, all specifications and configuration options for the Magnum 8000X-48VDC,
8000X-24VDC & 8000X-125VDC with this Dual-Source option are identical to those
listed in the Magnum 8000X Fiber Hubs Installation and User Guide, including
Appendix B “Internal DC Power Supply Option”

C2.0 MAGNUM 8000X , with -48VDC, 24VDC & 125VDC Dual-Source option

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The hub models with the internal -48VDC, 24VDC &125VDC Dual-Source
power supply are designed for installations where a battery plant is the power source,
and where two separate power sources are utilized in order to increase operational
uptime and to simplify maintenance.

The functionality of the Magnum 8000X-48VDC, 24VDC or 125VDC Dual­Source Option hubs are identical to the standard AC-powered models. All Port
Module, SNMP and stacking options are available for configuration with Dual-Source
Option units. Refer to the main sections of this Installation and User Guide for a
detailed description of the Magnum 8000X Hubs.

C3.0 DUAL-SOURCE OPTION, THEORY OF OPERATION

The Dual-Source DC power option is designed using diodes inside of the hub

on each DC power input line. A diode is

placed in each of the four input lines

(behind the four external power connection

terminals) so that power from an external

source can only flow into the hub. This

allows the hub to operate whenever DC

power is correctly applied to either or both

of the two inputs.

C4.0 FEATURES AND BENEFITS OF THE DUAL-SOURCE DESIGN

a) The hub can receive power from either input, “A” or “B”. The hub will normally draw its

power from the DC source with the highest voltage at a given time.

b) The hub will not allow power to flow from a higher voltage input to a lower voltage input, i.e.

the two DC power sources are not mixed together by the hub.

c) When one correct DC input is present, the hub will receive power if the other DC input is

absent, or even if it is connected with reverse polarity or shorted or grounded.

d) Reverse polarity connections, if they should accidentally occur on either input, will not

damage the hub or power supply internally (nor will it blow the fuse in the internal power
supply) because of the blocking action of the diodes. This is true even if one input connection
is reversed while the hub is operating from the other source.

e) The hub will not receive power (and will not work) when both inputs are simultaneously

absent or are both incorrectly connected.

C5.0 INSTALLATION

This section describes the proper connection of the -48VDC, 24VDC &
125VDC dual source leads to the -48VDC, 24VDC & 125VDC power terminal block
on the Magnum 8000X hub (shown in Figure C4.0).

The -48VDC terminal block on the Magnum 8000X is located on the right
rear of the unit and is equipped with five (5) screw-down lead posts (see Figure C5.0).
The primary terminals are identified as positive (A+), negative (A-), and the secondary
power terminals as negative (B-), positive (B+). The chassis “earth” or ground (GND),
is a threaded post with a #6 nut. The dual source terminal block for 24VDC and
125VDC are similar.

GND

FUSE

+

-

SUPPLY

A+

A-

B-

B+

GND

CHASSIS

HUB

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Figure C5.0: -48V DC Dual-Source, wiring connections to the External

Terminal Block on a Magnum 8000X 48VDC with Dual-Source option

Note: The GND should be hooked up first. The 8000X unit has a floating
ground, so the user may elect to Ground either + or = terminal to suit the customer’s
use.

Before connecting to Terminal Block of –48VDC, 24VDC or 125VDC,
always use a digital voltmeter to measure the output voltage of the power supply and
determine the lead which is more “+

ve potential”. The more “+ve” voltage lead from

48V or –48V supply must be connected to the post labeled “+”.

The connection procedure is straightforward. Simply connect the DC leads to
the hub’s power term

inals, positive (+) and negative (-) screws. The use of Ground
(GND) is optional; it connects to the hub chassis. Ensure that each lead is securely
tightened.

The 24VDC & 125VDC terminal block on Magnum 8000X is similar to that

described in the –48VDC info above.

C5.1 UL Requirements

The following must be adhered to in order to conform to UL requirements:

1. Minimum 14 AWG cable for connection to a Centralized DC power source.

2. Fastening torque of the lugs on the terminal block: 9 inch pound max.

3. Centralized DC Power Source cable securement, use at least four cable ties

to secure the cable to the rack at least 4 inches apart with the first one
located within 6 inches of the terminal block.

C6.0 ORDERING INFORMATION

To order the optional Dual-Source -48VDC power supply factory installed,
order “Dual-Src-48V” as a separate line item following the product model.
Example: Magnum 8000X-48VDC

Dual-Src48V for regular model with no ON-OFF switch

or Dual-Src48V-SWITCH for m

odel with ON-OFF switch

Similarly to order “Dual-Src 24V” or “Dual-Src 125V” as a separate line
item following the product model.
Example: Magnum 8000X

-24VDC or Magnum 8000X-125VDC
Dual-Src48V for regular model with no ON-OFF switch
or Dual-Src48V-SWITCH for m

odel with ON-OFF switch

36-70VDC

GND

A+ A- B- B+

36-70VDC

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C7.0 OPERATION

Operation of the Dual-Source Magnum 8000X-48VDC, 24VDC & 125VDC
hub models are identical to that of the standard models. Please refer to the applicable
sections of the “Installation and User Guide” for more information on the basic hubs.