GarrettCom 500-Series User manual

GARRETT GARRETT
Corporate Headquarters
Garrett Communications
47823 Westinghouse Drive
Fremont, CA 94539
Phone [phone]
FAX [phone]
Website: http://www.garrettcom.com
Email: [e-mail]
Magnum 500-Series
Switching Hubs
Installation and User Guide
UPLINK
PWR
1 2 3 4 5 6 7 8
LK/RX FDX
10Mb
Magnum 500-series
Switching Hub
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1 2 3 4 5 6 7 8
LK/RX FDX
UPLINK
AUTO
F/H
10Mb
10
PWR
LK/RX FDX
100100
10
F/H 1 2
Magnum 500-series
Switching Hub
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FH F H
1 2 3 4 5 6 7 8
LINK RX
UPLINK
10Mb
Magnum 500-series
Switching Hub
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L K RX
PWR
F/H
100
10
TX RX
100 Mb
RX
LK
AUTO
F/H
With Fiber Port
PWR
F/H
100
10 FH F H
1 2 3 4 5 6 7 8
LINK RX
UPLINK
10Mb
Magnum 500-series
Switching Hub
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L K RX TX RX
100 Mb
RX
LK
AUTO
F/H

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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Magnum500-Series
Switching Hubs
Installation and User Guide
Part #: 84-00059
Trademarks
UL is a registered trademark of Underwriters Laboratories
Ethernet is a trademark of Xerox Corporation
UL is a registered trademark of Underwriters Laboratories
Personal Hub is a registered trademark of Garrett Communications, Inc.
Magnum is a trademark of Garrett Communications, Inc.
Important: Magnum 500-Series Switching Hubs contain no user serviceable
parts. Attempted service by unauthorized personnel shall render any and all
warranties null and void. If problems are experienced with a Magnum
Switching Hub, consult Section 5, Troubleshooting, of this User Guide.
1998 Garrett Communications, Inc. All rights reserved. No part of this publication
may be reproduced without prior written permission from Garrett Communications, Inc.
Printed in the United States of America.

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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Contacting Garrett Communications
Please use the following mailing address, phone and fax numbers or Internet address.
Garrett Communications
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.

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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TABLE OF CONTENTS Page
1.0 SPECIFICATIONS....................................................................................1
1.1 Technical Specifications.................................................................................1
1.2 Ordering Information......................................................................................3
2.0 INTRODUCTION......................................................................................4
2.1 Inspecting the Package and Product ...............................................................4
2.2 Product Description - Magnum 500-Series Switching Hubs.........................4
2.2.1 Magnum 500-Series chassis................................................................4
2.2.2 10 & 100Mb ports, full- or half-duplex and auto-negotiation modes .6
2.2.3100Mb Fiber port, STor SC type(single mode or multi mode) 7
2.2.4 Frame Buffering and Latency.............................................................7
2.3 Features and Benefits......................................................................................9
2.4 Applications..................................................................................................10
3.0 INSTALLATION.....................................................................................11
3.1 Locating the Magnum 500-Series Switching Hubs.......................................11
3.1.1 Table-top or shelf mounting................................................................11
3.1.2 Wall (or Vertical) mounting................................................................12
3.1.3 Optional E-Stand ...............................................................................12
3.2 Powering the Magnum 500-Series Switching Hubs .....................................13
3.3 Connecting Ethernet Media ………………………………………………...17
3.3.1 Connecting Twisted Pair (RJ-45, Cat 3, 5, UTP, STP) ......................17
3.3.2 Connecting Fiber Optic 100BASE-FX,Type ST & SC………18
3.4 Internal jumper settings for 100Mb ports, auto-negotiation ON or OFF......18
4.0 OPERATION...........................................................................................19
4.1 Switching Funtionality, Filtering and Forwarding, Address learning...........20
4.2 Status LEDs..................................................................................................21
4.3 Manual switches for Up-link and Full/Half Duplex......................................21
4.4 Auto-negotiation option for copper Fast Ethernet ports ..............................22
4.5 Auto-negotiation for 10Mb ports, half- or full-duplex mode .....................23
4.6 Collision-based Flow Control…………………………………….. 24
5.0 TROUBLESHOOTING...........................................................................25
5.1 Before Calling for Assistance .......................................................................26
5.2 When Calling for Assistance.........................................................................27
5.3 Return Material Authorization (RMA) Procedure........................................28
5.4 Shipping and Packaging Information............................................................28
APPENDIX A: WARRANTY INFORMATION.......................................................29
APPENDIX B : OPTIONAL 48V-DC POWER ADDENDUM ..............................29

Magnum 500-Series Switching Hubs Installation and User Guide (07/98)
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MAGNUM
ETHERNET CONNECTIVITY PRODUCTS
"DESIGNED AND MANUFACTURED IN THE USA"
Overview
Garrett Communications offers the Magnum line of Ethernet LAN
physical layer connectivity products with industry-standard
functionality. Magnum products are available worldwide through
OEMs, integrators, representatives, and international distributors.
Dual Speed 8-port and 16-port Stackables, 10/100 auto-sensing
Stackable Hubs, SNMP Optional
10Mb series and 100Mb series, both with optional port modules
Switching Hubs, unmanaged 500-Series and managed 5000-Series
Two-Port Switches
100Mb RJ-45port + 10 / 100Mb combo port, or +FDX fiber port
Workgroup Hubs
10Mb series and 100Mb series, both with optional port modules
Personal Hubs 

, 100Mb
8- and 4-port with up-link, 6-port with one switched 10/100Mb
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
Workgroup Bridges, 10Mb series
Local segmentation for all media types
Fan-Outs, 10Mb series
2, 4 and 8 Port Models
Transceivers, 10Mb and 100Mb series
10Mb Mini-Transceivers and Coax Models, All Types
100Mb MII-TX and MII-FX models Aug. ‘98

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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1.0 SPECIFICATIONS
1.1 Technical Specifications
Performance
Aggregate Filtering Rate: 119,040 frames per second, 8 ports
297,600 frames per second, 2 TX ports
(for Magnum 528 Fast Ethernet ports)
Aggregate Forwarding Rate: 59,520 frames per second, 4 port-pairs
148,800 frames per second, 2 TX-pair
(for Magnum 528 Fast Ethernet ports)
Data Rate: 10 Mbps and 100 Mbps
Address Table Capacity: 2K (1954) node addresses
Buffer Size : 1 MB
Latency: 5 µs + packet time (100BASE-TX to 100BASE-T)
15 µs + packet time (10BASE-T to 10BASE-T,
and 10BASE-T to 100 BASE-TX/FX)
Network Standards
Ethernet V1.0/V2.0 IEEE 802.3: 10BASE-T,
IEEE 802.3u: 100BASE-TX, 100BASE-FX
Maximum Ethernet Segment Lengths
Unshielded twisted pair - 100 m (328 ft)
Shielded twisted pair - 150 m (492 ft)
Maximum Standard Fast Ethernet Segment Lengths:
100BASE-TX (twisted pair): 100 m (328 ft)
100BASE-FX Fiber half-duplex: (multi-mode) 412 m (1350 ft)
100BASE-FX Fiber full-duplex: (multi-mode) 2.0 km (6,562 ft)
100BASE-FX Fiber half-duplex: (single-mode) 412 m (1350 ft)
100BASE-FX Fiber full-duplex: (single-mode) 15 km (49,215 ft)
Connectors for copper wiring
8 Twisted Pair @ 10Mb : RJ-45 shielded, female, front mounted
2 Twisted Pair @ 100Mb) : RJ-45 shielded, female, front mounted
(for Magnum 528 Fast Ethernet copper ports, normally use Cat 5 cable)
Fiber Multi-mode Connector types:
Fiber Port, SC-type (snap-in): Fiber optic multi-mode, 100BASE-FX
Fiber Port, ST-type (twist-lock): Fiber optic multi-mode, 100BASE-FX
Fiber Single-mode Connector types:
Fiber Port, SC- and ST-types: Fiber optic single-mode, 100BASE-FX
Manual Switches
Up-link Switch: For 10Mb port-8 (10BASE-T)
Full / Half duplex manual switch: Two switches, one for each 100Mb port
(for Magnum 528 and 528F Fast Ethernet ports only)

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Fiber Optic Interface
100Mb/s Single-mode Port
Optical Typical Worst
Wavelength 1300nm -----
Transmitter output power -11.5dBm -15.5dBm
Receiver sensitivity -32dBm ----
Fiber Optic cable type 9/125µm single-mode
Saturation -8dBm
Max. Distance 15Km full-duplex (412m HDX, PDV limit)
100Mb/s Multi-mode Port
Optical Typical Worst
Wavelength 1300nm -----
Transmitter output power -16.5dBm -19.5dBm
Receiver sensitivity -23.5dBm -32.5dBm
Fiber Optic cable type 62.5/125µm multi-mode
Saturation -14dBm
Max. Distance 2Km full-duplex (412m HDX, PDV limit)
LEDs:
PWR (AC power), LK/RX (per-port Link & Receive),
FDX (per-port full / half-duplex mode for 10Mb ports)
For Model 528 Fast Ethernet copper ports only:
AUTO (Auto-negotiation operation), per-port, 100 (ON for 100Mb/s
speed), 10 (ON for 10Mb/s speed), F/H (Full- or Half-Duplex, ON for
full-duplex, OFF for half-duplex). No AUTO for Model 528F Fiber ports
Operating Environment
Ambient Temperature: 32°to 120°F (0°to 50°C)
Storage Temperature: -20°to 60°C
Ambient Relative Humidity: 10% to 95% (non-condensing)
Packaging
Enclosure: High strength metal. Suitable for wiring closet shelf,
desktop, or vertical / wall mounting (brackets included)
Dimensions: 9.55 in D x 8.5 in W x 1.3 in H (24 cm x 22cm x 3.3 cm)
Weight: 2.5 lb. (1.15 Kg)
Cooling method: Fan cooled, @ 9 cfm
Power Supply (Internal)
AC Power Connector: IEC-type, male recessed, rear of chassis
Input Voltage: 90 to 260 VAC (auto-ranging)
Input Frequency: 47 to 63 Hz (auto-ranging)
Power Consumption: 10 watts typical, 20 watts P.S. rating
Agency Approvals
UL listed (UL1950), cUL, CE
Emissions meet FCC Part 15 Class A
Warranty
Three years, return to factory Made in USA

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1.2 Ordering Information
Magnum 500-Series Switching Hubs
MODEL DESCRIPTION
Magnum 528 Switching Hub, eight ports at 10Mb F/H plus two 100Mb
Fast Ethernet ports (F/H and 10/100). Self-learning 2K
node-capacity address table, Store and Forward operation
to filter all errored frames, full wire-speed filtering and
forwarding among all ports. Up-link switch on 10Mb port
# 8. Internal auto-ranging power supply.
(The copper Fast Ethernet ports can be manually set to
the desired mode, or may optionally be set for support of
10/100 and F/H IEEE 802.3u standard auto-negotiation).
Magnum 528F-SC Same as Model 528, but with a 100BASE-FX fiber port,
multi-mode SC connector, and a 100Mb RJ-45 port.
Magnum 528F-ST Same as Model 528, but with a 100BASE-FX fiber port,
multi-mode ST connector, and a 100Mb RJ-45 port.
Magnum 528F-SMSC Same as Model 528, but with a 100BASE-FX fiber port,
single-mode SC connector, and a 100Mb RJ-45 port.
Magnum 528F-SMST Same as Model 528, but with a 100BASE-FX fiber port,
single-mode ST connector, and a 100Mb RJ-45 port.
Magnum 508 Same as Model 528 but without the 2 Fast Ethernet ports
. Eight 10Mb switched ports (no 100Mb ports)
Garrett Communications reserves the right to change specifications, performance
characteristics and/or model offerings without notice.

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2.0 INTRODUCTION
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 508, 528 or 528F Switching Hub
1 AC Power Cord (U.S. and other 115 VAC only)
1 Set of two wall-mounting brackets
1 Installation and User Guide (this manual), and Product Registration Card
Remove the items from the shipping container. Be sure to keep the shipping
container should you need to re-ship the unit at a later date. To validate the product
warranty, please complete and return the enclosed Product Registration Card to Garrett
Communications as soon as possible.
In the event there are items missing or damaged, contact the party from whom
you purchased the product. If the unit needs to be returned, please use the original
shipping container if possible. Refer to Section 5, Troubleshooting, for specific return
procedures.
2.2 Product Description - Magnum 500-Series Switching Hubs
The Magnum 500-Series Switching Hubs provide 8-port switching services to
enhance the performance of 10Mb Ethernet networks by segmenting the network traffic.
They may be used with existing Cat 3 cabling and shared 10b Ethernet hubs. On models
528 and 528F, there are two Fast Ethernet switched ports additionally that provide
100Mb switching services for high speed network connections. Full speed is maintained
across all ports, even when handling the smallest 64-byte frames.
All 10Mb ports in both units can auto-negotiate to either half- or full-duplex
mode. The copper Fast Ethernet ports on Model 528 & 528F are normally set for 100Mb
with manual selection of F/H duplex, but may be optionally set for auto-negotiation.

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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Designed for use in departments with multiple workgroups, in remote offices
and in network traffic centers, the Magnum 500-Series switches are easy to install and
use. Addresses of attached nodes are automatically learned and maintained, adapting the
switching services to network changes and expansions. The Magnum 500s provide high
performance plug-and-play operation in a compact package.
2.2.1 Magnum 500-Series chassis
Figure 2.2a: Front view Magnum 508, 528 and 528F Switching Hubs
Magnum 500-Series switching hubs are equipped with eight shielded RJ-45
ports for shielded and unshielded 10BASE-T connections. Magnum 528 switching hubs
also have two shielded RJ-45 Fast Ethernet ports for 100BASE-TX connection. Both
units include a up-link switch for crossover connection located next to 10Mb Port # 8.
Each 10Mb RJ-45 connector has two LED’s, one to indicate LK/RX (LINK / Receive)
activity and the other (FDX) for indicating full-duplex mode.
On Magnum 528 and 528F models, the 100Mb activity LEDs and the LINK
LEDs are located in the copper Fast Ethernet ports. Other LEDs indicate when auto-
negotiation (copper only) is internally selected, that operating speed is 10Mb or 100Mb,
and when the operating mode is full-duplex. Magnum 528 and 528F models also have
two full/half (F/H) switches for the two 100Mb ports for manual selection of the full- or
half-duplex mode when auto-negotiation is not selected. All connectors, switches and
LED’s are located on the front panel, with the AC power connector located at the rear.
Figure 2.2b: Rear view
-- Magnum 508, 528 and
528F Switching Hub
PWR
F/H
100
10 FH F H
1 2 3 4 5 6 7 8
LINK RX
UPLINK
10Mb
Magnum 500-series
SwitchingHub
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L K RX TX RX
100 Mb
RX
LK
AUTO
F/H
1 2 3 4 5 6 7 8
LK/RX FDX
UPLINK
AUTO
F/H
10Mb
10
PWR
LK/RX FD X
100100
10
F/H 1 2
Magnum 500-series
Switching Hub
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1 2 3 4 5 6 7 8
LK/RX FDX
UPLINK
PWR 10Mb
Magnum 500-series
Switching Hub
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FH F H
1 2 3 4 5 6 7 8
LINK RX
UPLINK
10Mb
Magnum 500-series
Switching Hub
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L K RX
PWR
F/H
100
10
TX RX
100 Mb
RX
LK
AUTO
F/H
GARRETT
115-230V~ 50/60 Hz

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2.2.2 10 and 100Mb ports, full- or half-duplex and auto-negotiation modes
Figure 2.2.2: two@100Mb copper ports (528 model), 1@100Mb copper and
1@100Mb fiber ports (528F models), and 8@10Mb ports
All Magnum 500-Series Switching Hubs provide eight 10Mb switched ports.
All 10Mb switched ports are independently auto-negotiating for selecting to operate in
full-duplex mode, and will independently default to half-duplex mode when the 10Mb
device at the other end is half-duplex or is not an auto-negotiating device.
The two Fast Ethernet switched ports on the Magnum 528 and 528F normally
are set (by factory default) to operate at fixed 100Mb speed for guaranteed high-speed
performance. In this case, each of these two ports will run at 100Mbps at all times. The
user may select full- or half-duplex mode per-port with a manual switch for flexibility to
adapt to any type of Fast Ethernet devices. The Full / Half-duplex manual switches are
located on the front panel next to their corresponding Fast Ethernet ports.
For operation in Fast Ethernet auto-negotiating mode (copper only), internal
jumpers must be set. The “AUTO” LED will then be lit to show that auto-negotiation is
in operation. See Sections 4.4 and 3.4 for additional details.
On Magnum 528 units, there are three LED’s for each Fast Ethernet port. One
indicates operation at 100Mb speed when lit, one indicates operation at 10Mb speed
when lit (possible when auto-negotiation is enabled only, copper ports), and one is lit to
indicate full-duplex operation (when it is OFF, operation is half-duplex). A twisted pair
or fiber cable must be connected to each 100Mb port and a proper link (LK lit) must be
made with the device at the other end of the cable in order for these LEDs to provide
valid indications of operating conditions.
PWR
RX
LK
AUTO
F/H
FH F H
L K RX
F/H
100
10
TX RX
100 Mb
1 2 3 4 5 6 7 8
LK/RX FDX
UPLINK
10Mb
AUTO
PWR
F/H F/H
10
LK/RX FDX
100100
10
12

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2.2.3 100Mb/s Fiber Port, ST or SC type (Single-Mode or Multi-Mode)100Mb1@
1 @ 100Mb Fiber port, type ST or SC (Magnum 528F models only)
The two Fast Ethernet switched ports on the Magnum 528F normally are set (by factory
default) to operate at fixed 100Mb speed for guaranteed high-speed performance. The
528F’s fiber ports can be connected using a multi-mode ST, SC or single-mode ST, SC
connector. In the factory-default setting, each of the 100Mb RJ-45 ports and/or the
100Mb Fiber port will run at 100Mb/s speed at all times
On the Magnum 528 and 528F models, the user may select full- or half-duplex
mode per-port with a manual switch for flexibility to adapt to any type of Fast Ethernet
devices. The Full/Half-duplex manual switches are located on the front panel under the
corresponding Fast Ethernet ports for convenient access.
On Magnum 528F units, there are three LED’s per Fiber Optic port. One (LK)
indicates ready for operation at 100Mb when lit, one indicates operation in full-duplex
mode when ON (when it is OFF, operation is half-duplex), and one indicates Receiving
Activity (RX). A fiber cable must be connected to each 100Mb port and a proper link
(LK lit) must be made with the device at the other end of the cable in order for these
LEDs to provide valid indications of operating conditions.
2.2.3 Frame Buffering and Latency
The Magnum 500-Series are store-and-forward switches. Each frame (or
packet) is loaded into the Magnum 500’s memory and inspected before forwarding can
occur. This technique ensures that all forwarded frames are of a valid length and have
the correct CRC, i.e., are good packets. This eliminates the propagation of bad packets,
enabling all of the available bandwidth to be used for valid information.
While other switching technologies such as "cut-through" or "express" impose
minimal frame latency, they will also permit bad frames to propagate out to the Ethernet
segments connected. The "cut-through" technique permits collision fragment frames,
which are a result of late collisions, to be forwarded to add to the network traffic. Since
PWR
RX
LK
AUTO
F/H
FH F H
L K R X
F/H
100
10
TX RX
100 M b
ST Connector (Magnum 528F-ST) SC Connector (Magnum 528F-SC)
PWR
RX
LK
AUTO
F/H
FH
L K R X
F/H
100
10
TX RX
100 M b

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there is no way to filter frames with a bad CRC (the entire frame must be present in order
for CRC to be calculated), the result of indiscriminate cut-through forwarding is greater
traffic congestion, especially at peak activity. Since collisions and bad packets are more
likely when traffic is heavy, the result of the Magnum 500’s Store and Forward operation
is that more bandwidth is available for good packets when the traffic load is greatest.
To minimize the possibility of dropping frames on congested ports, the
Magnum 500-Series dynamically allocates buffer space from a 1 MB memory pool,
ensuring that heavily used ports receive very large buffer space for packet storage.
(Many other switching hubs have their packet buffer storage space divided evenly across
all ports, resulting in a small, fixed number of packets to be stored per port. When the
port buffer fills up, dropped packets result.) This dynamic buffer allocation provides the
capability for the maximum resources of the Magnum 500 unit to be applied to all traffic
loads, even when the traffic activity is unbalanced across the ports. Since the traffic on
an operating network is constantly varying in packet density per port and in aggregate
density, the Magnum 500 Switches are constantly adapting internally to provide
maximum network performance with the least dropped packets.
Another feature implemented in Magnum 500-series switches is a collision-
based flow-control mechanism. When the switch detects that its free buffer queue space
is low, the switch prevents more frames from entering by forcing a collision on all
receiving half-duplex ports in order to stop incoming traffic. See Section 4.6 for
additional details.
The latency (the time the frame spends in the switch before it is sent along or
forwarded to its destination) of the 500-Series switches varies with the port-speed types,
and the length of the frame is a variable here as it is with all store-and-forward switches.
For 10Mb-to-10Mb or 10Mb-to-100Mb or 100Mb-to-10Mb forwarding, the latency is 15
microseconds plus the packet time at 10Mb. For 100Mb-to-100Mb forwarding, the
latency is 5 microseconds plus the packet time at 100Mb.

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2.3 Features and Benefits
!
!!
!Ideal for enhancing the performance of existing 10Mb segments
The Magnum 508 has eight 10Mb switched ports, each operating at full-or
half-duplex, for segmenting a 10Mb network to increase performance.
!
!!
!Full-duplex or Half-duplex operation, auto-sensing
All 10Mb and 100Mb RJ-45 ports are capable of half- or full-duplex. The
Magnum 528F’s 100Mb fiber port may be used in full-duplex fiber
segments for distances up to 2Km multi-mode or 15Km single-mode.
!
!!
!High Performance
Magnum 500-Series Switching Hubs overcome congestion on shared-
bandwidth networks, performing high speed filter/forward operations on
the traffic, giving each port’s segment a full 10Mb or 100Mb bandwidth.
!
!!
!Assured 100Mb performance in any network set-up
The two 100Mb ports normally are set to operate at 100Mb speed, and are
user selected for full-or half-duplex. The 100Mb speed is assured, no
matter what types of devices are attached. (Auto-negotiation is optional).
!
!!
!Dynamic Buffer Space Allocation
Magnum 500-Series Switching Hubs adapt to their network’s traffic
changes, dynamically allocating internal resources to maximize
performance even for unbalanced loads. And, flow control is included.
!
!!
!Plug-and-Play installation for high performance switching
Magnum 500’s are self-learning for up to 8000 node addresses, so they
can be placed in operation without complex set-up procedures, even in
large networks. Front-mounted LINK LEDs provide a very simple way to
verify wiring connections at both ends of each attached twisted-pair cable.
Front-mounted LEDs show the operating mode and activity on each port.
!
!!
!Small package for office networks, "Universal" Power Supply
The compact package of the Magnum 500-Series switches allow them to
be used in office networks where a large rack-mount unit would be
undesirable. An internal auto-ranging AC power supply allows any
Magnum 500-Series Switching Hub to be used throughout the world.
!
!!
!Front-mounted LEDs display operating status
Front panel LED’s display the status of each port for easy monitoring.

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2.4 Applications
Magnum 500-Series Switching Hubs offer a great deal of performance and
flexibility, and are easily used in a variety of ways including client/server applications,
departmental networks performance upgrades and collapsed backbone applications.
Example 1 : Magnum 508
In a typical 10Mb network performance upgrade, multiple cascaded 10Mb hubs
connect all networked devices using one 10Mb traffic domain. The Magnum 508
Switching Hub provides eight 10Mb traffic domains for increased performance. It
connects all 10Mb equipment, hubs and servers, in the existing network while providing
full 10Mb bandwidth to the network segment on each separate port.
The Magnum 508 switch filters and forwards packets from one segment to
another, containing the local traffic and allowing only the packets which need to be
forwarded to go outside to the appropriate other segments. This provides several 10Mb
traffic domains rather than only one as before, greatly increasing performance. This is
ideal for a central departmental switch that has branches out to workgroup and/or
Personal Hubswith users attached, and provides dedicated 10Mb ports for commonly
used servers. Figure 2.4 illustrates this example.
Figure 2.4a: BEFORE
Existing 10Mb
cascaded network
Fig. 2.4b: AFTER
Magnum 508 Switching
Hub provides
connectivity while
maintaining full
10Mbps bandwidth on
each segment.
Magnum 800E
Workgroup Hub
100 Mb/s
GARRETT
LINK
RX LINK RX
PWR C OL 1 2 3 5 6 7
Congested 10Mb Network
Magnum 800E
Workgroup Hub
100 Mb/s
GARRE TT
LINK
RX LINK RX
PWR C OL 1 2 3 5 6 7
Ma gnum 800E
Work gr oup Hub
100Mb/s
GARRETT
LINK
RX LINK RX
PWR COL 1 2 3 5 6 7
10Mb Workgroups
Ma gnum 800E
Work gr oup Hub
100Mb/s
GARRETT
LINK
RX LINK RX
PWRCOL 1 2 3 5 6 7
1 2 3 4 5 6 7 8
RX UPLINK
10Mb
LINK
PWR

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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11
Example 2 : Magnum 528
The Magnum 528 Switching Hub is a Magnum 508 plus two 100Mb Fast
Ethernet RJ-45 ports. The applications may be similar to the Magnum 508 but, but with
two 100Mb copper ports, it also provides switched connectivity between 10Mb and
100Mb network segments.
Consider Figure 2.4c. In this example, a small corporation reached a point
where it needed to make a decision about adding some 100Mb servers and users to the
existing 10Mb network. The servers had installed 10/100 network interface (NIC) cards
and, as one application alternative, they may be connected to the Magnum 528’s 100Mb
ports to provide much better 100Mb server access speed for all the 10Mb users.
As the network expands further, some users may need to go to 100Mb speed.
To accommodate this while maintaining the rest of the network topology, a 100Mb hub
may be attached to one of the Magnum 528’s Fast Ethernet port (see illustration in Figure
2.4c below, showing only one server per 100Mb port). The Fast Ethernet hub (for
example, a Magnum Lite ML8 100Mb office hub) then provides 100Mb ports for the
servers and for some 100Mb users.
The Magnum 528 Switching Hub provides complete network connectivity so
that all 10Mb and 100Mb nodes operate in a unified manner, functioning as one plug-
and-play switched network facility.
In this example, the 10Mb segments on the 528’s 10Mb ports each have 10Mb
of switched bandwidth, and may be either half- or full-duplex per port. Simultaneously,
the two Fast Ethernet ports provide 100Mb F/H each, and have full-speed switched
access to each other as well as to each of the 10Mb ports.
Figure 2.4c: Using a Magnum 528 Switch, 100Mb servers and users are added
to an existing 10Mb network
10Base-T
1 2 3 4 5 6 7 8
RX UPLINK
10Mb
LINK
AUTO
PWR LINK RX
1 2
100Mb Servers 10Mb Workgroup
Magnum 800E
Workgrou p Hub
10 0 Mb /s
GARRETT
LI NK
RX LI NK RX
PWR C OL 1 2 3
45 6 7 8
100Mb Server, PCs

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Example 3 : Magnum 528
In another situation similar to Example 2 above, the network may need to be
linked to a Fast Ethernet backbone. This application is handled by the Magnum 528
using one 100Mb switched port for local high speed servers and users, while using the
other 100Mb switched port for a link upstream.
Using two Magnum 528s and linking a 100Mb switched port from each unit,
one can implement a Fast Ethernet switched connection which can run in full duplex
mode. The result is similar to “stacking” the two Magnum 528s to provide a net total 16
ports of switched 10Mb plus 2 ports of switched 100Mb.
When using a Magnum 528’s 100Mb switched port as a link, it is frequently
desirable to make the connection to the upstream device using fiber cable operating at
100Mb speed. In this situation, an external 100Mb Media Converter unit (such as a
Magnum 15E) is used to change from twisted pair cable to fiber cable.
Because commercially-available 100Mb Media Converters do not support
10/100 speed auto-negotiation, it is necessary in this situation to operate both ends of the
fiber link with ports that have fixed 100Mb-speed capability. In addition, since 100Mb
fiber cable has severe distance limitations at half-duplex, it is almost always necessary to
operate such a fiber link in the full-duplex mode. Many low-end switching hubs that
only have auto-negotiation on their 100Mb ports cannot support this application, but the
Magnum 528 . . . with fixed 100Mb speed as a default setting, and with manually-
selected half- or full-duplex mode per Fast Ethernet port . . . handles this readily.
Figure 2.4d: The Magnum 528 provides 100Mb ports for backbone connections.
10Base-T
100Mb Hub
1 2 3 4 5 6 7 8
RX UPLINK
10Mb
LINK
AUTO
PWR
LINK RX
1 2 Internet
100Mb Servers
and Workstations
10Mb Workgroup
Router
1 2 3 4 5 6 7 8
Magnum 800E
Wor kg r ou p H ub
100 Mb/s
GARRETT
LINK
RX LINK RX
PWR COL 1 2 3 5 6 7
GARRETT
LINK
LINK
PWR
Mag num 15E
Media Converter
100
Mb/s
100Mb Fiber Link 100Mb Media
Converter

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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Example 4 : Magnum 528F
In another situation similar to Example 3 above, the network may need to be
linked with fiber cabling to a Fast Ethernet backbone. This application is handled by the
Magnum 528F, using one 100Mb switched copper port for local high speed servers and
users, while using the fiber 100Mb switched port for the fiber backbone connection.
Using the Magnum 528F’s 100Mb switched fiber port, one can implement a
Fast Ethernet switched fiber connection that runs in full-duplex mode. The result is a
high-speed LAN connection upstream with switched 100Mb full-duplex performance and
maximum fiber distance – all without a 100Mb media converter. Alternatively, two
Magnum 528Fs can be connected with switched 100Mb fiber to form a larger LAN.
When using a Magnum 528F’s 100Mb switched fiber port as a link, it is
frequently desirable to operate the connection to the upstream device in full-duplex mode
since 100Mb fiber cable has severe distance limitations at half-duplex. In this situation, it
is necessary to operate both ends of the fiber link with ports that have fixed 100Mb-speed
and user-determined full-duplex capability (no auto-negotiation).
Many low-end “commodity” switching hubs that only have RJ-45 ports with
auto-negotiation cannot support this application. They have no built-in fiber, and they do
not properly support 100Mb media converters. Even if they did support media
converters properly, the converters are awkward extra items that add substantially to the
cost. But the Magnum 528F models . . . with fixed 100Mb speed as a default setting on
the Fast Ethernet ports, and with manually-selected half- or full-duplex mode per Fast
Ethernet port . . . handle this application readily and economically.
Figure 2.4e: The Magnum 528F provides a 100Mb port for backbone connection.
100Mb Hub
10Base-T
FH F H
1 2 3 4 5 6 7 8
LINK RX
UPLINK
10Mb
Magnum 500-series
Switching Hub
GARRETT
L K RX
PWR
F/H
100
10
TX RX
100Mb
RX
LK
AUTO
F/H Internet
100Mb Servers
and Workstations
10Mb Workgroup
Router
1 2 3 4 5 6 7 8
Magnum 80 0E
Workgrou p Hub
10 0 M b/ s
GARRETT
LIN K
RX LIN K RX
PWR COL 1 2 3
45 6 7 8
100Mb Fiber Link
100Mb Media
Converter

Magnum 500-Series Switching Hubs Installation and User Guide (08/98)
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14
3.0 INSTALLATION
This chapter provides instructions for installing Magnum 500-Series switches.
3.1 Locating Magnum 500-Series switches
The location of a Magnum 500-Series switch is dependent on the physical
layout of the network. Typically the switch is placed where combinations of 10Mb and
100Mb network devices need to be connected to communicate with each other. The
compact size of the unit allows it to be conveniently placed in an office or lab area, and it
can also be either shelf of wall-mounted (see instructions in 3.1.2 below). Wall-
mounting brackets are included, usable for single units (but not for stacks).
Locate an AC receptacle that is within six feet (2 meters) of the intended
Magnum 500 site. The rugged metal case of the Magnum 500 will normally protect it
from accidental damage in a lab or workplace setting. Maintain an open view of the front
to visually monitor the status LEDs. Keep an open area around the unit so that cooling
can occur from the small fan in the bottom-rear while the unit is in operation. See figure
below.
Figure 3.1 : Location of Magnum 500’s cooling fan exhaust
3.1.1 Table-Top or Shelf Mounting
The Magnum 500-Series switch 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. When stacked, the rubber feet also provide separation
between units for the exhaust of the rear cooling fan.
GARRETT
115-230V~ 50/60 Hz
FAN EXHAUST

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3.1.2 Wall (or Vertical Surface) Mounting
Each Magnum 500-Series switch is shipped with two metal mounting brackets
(and screws) to allow the unit to be mounted in nearly any desired orientation or position.
The brackets are attached to the metal hub case using one of the metal screws for each
bracket, and attached to the Magnum 500 through the round hole of the bracket. A user-
supplied screw attaches the bracket to the mounting surface. It is recommended that the
mounting brackets be attached to two opposite corners of the unit. When properly
attached, the brackets will extend slightly below the base of the unit to allow clearance
for the rubber feet and for cooling fan exhaust space.
Figure 3.1: Magnum 500-Series, metal mounting brackets
3.1.3 Optional E-Stand
The optional E-Stand provides a vertical mounting option for the Magnum
500-Series Hubs. When horizontal placement is not possible or desirable (such as on the
floor in carpeted areas), the E-Stand offers a unique space management option. Simply
align the rectangular cut-out on the E-Stand with the air vent on either side of the
Magnum 500 unit.
The E-Stand also allows the Magnum 500-Series unit to be securely mounted
via two screws that connect through the E-Stand and into the side of the unit.
See Figure 3.1.3, following.
Ma
g
num 500 with attached
mountin
g
brackets
GARRETT
Magnum 500
-
series
Switchin
g
Hub
Pro
p
er mountin
g
bracket attachment
GARRETT
100 Mb/s
AU
TO
F/
H
PW
RLK/RX F
D
X1
0
01
0