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