GarrettCom DS 880 User Manual

Magnum DS 880

10 / 100 Dual-Speed

Stackable Hubs

I
n
s
t
a
l
a

Installation and User Guide

www GarrettCom com

..

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

Magnum DS880
10/100 Dual-Speed

Stackable Hubs

Installation and User Guide

Part #: 84-00058 Rev C (05/01)

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 DS880 10/100 Dual Speed Stackable Hubs family
contains no user serviceable parts. Attempted service by unauthorized
personnel shall render all warranties null and void. If problems are
experienced with Magnum DS880 10/100 Dual Speed Stackable Hubs
products, consult Section 5, Troubleshooting, of this User Guide.

Copyright  2001 GarrettCom, Inc. All rights reserved. No part
of this publication may be reproduced without prior written permission from
GarrettCom, Inc.

Printed in the United States of America.

www GarrettCom com

..

i

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

Contacting GarrettCom, Inc

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

GarrettCom, Inc.

47823 Westinghouse Dr.

Fremont, CA 9453-7437

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.

www GarrettCom com

..

ii

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

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.

4K-Series Switches, 100 & 10Mbps, 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

Fan-Outs, 10Mb series
2, 4 and 8 Port Models

Transceivers, 10Mb and 100Mb series 10Mb Mini-Transceivers

and Coax Models, All Types -

Apr, 01

www GarrettCom com

..

iii

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

T

ABLE 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............................................................................................5

2.2.1 Magnum DS880 Chassis .........................................................................7

2.2.2 10 / 100 Speed Auto-sensing...................................................................7

2.3 Stacking Magnum DS880’s ...............................................................................8

2.4 Bridge Module between the 10Mb and 100Mb Domains ...................................9

2.5 Up-link Switch on Port # 8 for Cascading...........................................................9

2.6 Features and Benefits........................................................................................10

2.7 Applications...................................................................................................... 11

3.0 INSTALLATION ......................................................................................................13

3.1 Locating Magnum DS880 Dual-Speed Hubs....................................................13

3.1.1 Table-Top or Shelf Mounting................................................................13

3.1.2 Wall (or Vertical Surface) Mounting.....................................................13

3.2 Connecting Ethernet Media............................................................................. 14

3.2.1 Connecting Twisted Pair (CAT3, CAT5).............................................. 14

3.2.2 Collision Domain Diameter, Cable Distances and PDV Calculations...14

3.2.3 Connecting to NICs which support Auto-Negotiation...........................17

3.3 Powering the Magnum DS880.......................................................................... 18

4.0 OPERATION............................................................................................................. 18

4.1 Dual-Speed Functionality................................................................................ 18

4.1.1 Software Transparency...........................................................................20

4.2 Port Speed settings for 10,100 and 10/100Mbps Mode only...........................20

4.3 Auto-negotiation and speed-sensing ................................................................ 21

4.4 LEDs ................................................................................................................ 21

4.5 Up-link Switch..................................................................................................21

5.0 TROUBLESHOOTING............................................................................................. 22

5.1 Before Calling for Assistance ...........................................................................22

5.2 When Calling for Assistance............................................................................. 23

5.3 Return Material Authorization (RMA) Procedure.............................................23

5.4 Shipping and Packaging Information................................................................24

A

PPENDIX

A

PPENDIX

A: WARRANTY INFORMATION................................................................24

B: OPTIONAL 48VDC POWER SUPPLY, ADDENDUM ...........................25

Revisions
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 02/99 : Added optional 48vdc power supply addendum; Port Speed settings for
10,100 and 10/100Mbps Mode only; Connecting to NICs which support Auto­Negotiation information; and Collision Domain Diameter, Cable Distances and PDV
calculations.

Rev A 10/97 : This revision is the initial release of the DS880 Dual Speed
Stackable Hubs user manual.

www GarrettCom com

..

iv

Magnum DS880 Dual-speed Stackable Hubs Installation and User Guide(05/01)

1.0 SPECIFICATIONS

1.1 Technical Specifications

100 or 10 Mb/s per port, auto-sensing for speed. DS880 hubs support
two traffic domains, one at 100Mb/s and one at 10Mb/s, have eight RJ-45
ports, and are stackable up to 3 units high operating as one repeater.

When a port is operating at 100Mb/s:

Performance

Data Rate: 100 Mb/s
PDV (Path Delay Value) : 80BT, exceeds Class II
When a port is operating at 10Mb/s:
Data Rate: 10 Mb/s

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

Network Standards

100Mb: Ethernet IEEE 802.3u , 100BASE-TX
10Mb: Ethernet IEEE 802.3, 10BASE-T
Auto-sensing for speed: IEEE 802.3u

Packet-Processing Between Domains (internal 10/100 switch or bridge)
Filtering and Forwarding Rate from 100Mb ports: 148,800 pps max

Filtering and Forwarding Rate from 10Mb ports: 14,880 pps max.
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 10Mb : 5s
10 to 100Mb : 5s
CPU Type : State Machine

Maximum Ethernet Segment (or Domain) Lengths
10BASE-T (Unshielded twisted pair) - 100 m (328 ft)

100BASE-TX (CAT 5 UTP) - 100 m (328 ft)

Operating Environment

Storage Temperature: -20ºC to 60ºC
Ambient Relative Humidity: 10% to 95% (non-condensing)

Ambient Temperature: 32ºF to 122ºF (0ºC to 50ºC)

Power Supply (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

www GarrettCom com

Power Consumption : 20 watts max

..

.

1

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

(1.1 Technical Specifications, continued)

48VDC Power Supply (Optional

)

Power Input Voltage : 36 to 72 VDC (auto ranging)
Terminal Block in rear: “-, GND, +”
Power Consumption: 20 watts max.

Network Cable Connectors - for the eight RJ-45 shielded female ports per hub

100Mb: Category 5 UTP/STP
10Mb: Category 3, 4, 5 UTP (Note: speed-sensing does not sense cable type)

Stacking Cable - stacking may be up to four DS880 hubs, or 32 ports

A stacking cable with 50-pin “SCSI” male connectors, shielded, 9 inches (23 cm)
long, is included with each Magnum DS880-A Dual-Speed add-on unit.

Switch, Manual

UP-LINK : MDI-X thumb-operated slide switch, converts RJ-45 port #8 from a
regular (=position) user segment port to a crossover (X position) up-link port for
On/Off connection to a central hub or another cascaded hub. The up-link port #8
is auto-sensing for speed, and the up-link works the same at 10Mb or 100Mb.

Packaging
Enclosure: High strength metal. Metal mounting brackets included.
Suitable for wiring closet shelf, wall or desktop mounting.
Dimensions: 9.75 in D x 8.5 in. W x 1.4 in. H ( 25cm x 22cm x 3.5cm)
Weight: 2.5 lb. ( 1.15 Kg)
Cooling method: Fan cooled, internal @ 9 cfm

LED Indicators
PWR : Steady On when power applied
BR : Bridge Module Indicator, On when 10/100 bridge module is installed
(Model DS880-B), Off when no bridge module is inside (DS880-A)
COL : Collision LEDs, one each for 100Mb and 10Mb speed domains
ACT : Common packet activity indicator, one for each traffic domain
100 (per port): Steady On when speed is 100Mbps , Off when speed is 10Mb,
flashing when auto-negotiating or when not connected (no LINK)
LK (per port): Steady On when twisted-pair link is operational
RX (per port): Activity, flashing when port is receiving data

Agency Approvals
UL Listed (UL 1950), cUL, CE

Emissions: meets FCC Part 15, Class A
Optional: NEBS L3 Certified

Warranty

Three years, return to factory Made in USA

www GarrettCom com

..

2

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

1.2 Ordering Information

Magnum DS880 Dual-Speed Stackable Hubs

Magnum DS880-A:

ports, each auto-sensing for 100Mb or 10Mb operation. Stackable

up to three units high, with all ports in one stack operating as two

separate traffic domains, one domain at 100Mb/s and one domain

at 10Mb/s. Includes stacking cable, internal auto-ranging power-

supply, cooling fan, and metal brackets for shelf or wall mounting.

Magnum DS880-B:

switch module that bridges the two traffic domains, filtering and

selectively forwarding packets between the 100Mb and the 10Mb

domains. Stacks up to three DS880-A units. One DS880-B unit per

stack supports all ports at 100Mb or 10Mb communicating with

each other. The internal switch has 2Mb dynamic store-and-

forward packet buffers and 8K node addresses.

Dual-Speed 10/100 Stackable Hub with eight RJ-45

Same as Magnum DS880-A but includes an internal

GarrettCom reserves the right to change specifications, performance

characteristics and/or model offerings without notice.

www GarrettCom com

..

3

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

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 DS880-A or DS880-B Dual-Speed Hub Unit
1 AC Power Cord (U.S. and other 115 vac locations only)
1 Stacking Cable, Model DS880-A

add-on (no bridge inside) units only
1 Set of metal clips and screws for wall-mounting
1 Installation and User Guide

1 Product Registration Card

Remove the Magnum DS880 Dual-Speed Hub from the shipping container. Be sure to

keep the shipping container should you need to ship the unit 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 your supplier. If you need to
return the unit use the original shipping container. Refer to Chapter 5, Troubleshooting, for
specific return procedures.

www GarrettCom com

..

4

Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01)

2.2 Product Description - General

Magnum DS880 Dual-Speed hubs have eight RJ-45 ports, each 10/100Mb auto­sensing. Each port can independently identify (via IEEE 802.3u auto-sensing) and accept either
100Mb or 10Mb Ethernet signals, adapting to match the best speed of the connected device.
There are two internal traffic domains in Magnum DS880 hubs, one for the 100Mb traffic and
one for the 10Mb traffic. The 100Mb users share the 100Mb domain’s bandwidth and the 10Mb
users share the 10Mb domain’s bandwidth.

Any DS880 port can connect into either the 100 or the 10Mb traffic domain, and can
also change from one traffic domain to the other at any time without affecting the speed of other
ports. The automatic per-port speed-sensing is continuous, allowing the connected devices to
change speed at any time without impairing the operation of the other ports and connected
devices.

DS880A

10Mb Hub 100Mb Hub

1 2 3 4 5 6 7 8

PWR

GARRETT

1 2 3 45 6 7 89 1 0 11 12

PWR

Magnum

PWR

Stackable

8000E
Hub

GARRETT

1 2 3 4 5 6 7 8

9 10 11 12

BR UPLINK

1 2 3 4 5 6 7 8

LK

ACT
COL

RX

Figure 2.2.1 : Magnum DS880 is functionally both a 10Mb and a 100Mb hub in one

As Magnum DS880 Dual-Speed units are stacked, the two shared traffic domains
automatically expand to support all of the ports in the stack. Any combination of 10Mb and
100Mb ports, up to the maximum of 32 ports (4 units) in one stack, can be in use at any time.

One DS880 Model, the Magnum DS880-B, includes an internal bridge or switch
module which interconnects the 10 Mb and the 100Mb traffic domains. This enables all users on
a DS880-B hub or a DS880 stack, whether 100Mb or 10Mb, to talk to each other. The internal
switch of the DS880-B filters and selectively forwards packets between the 10Mb and the
100Mb domains, maintaining peak performance in each domain unaffected by local traffic in the
other domain. The internal bridge is self-learning, with large address table capacity for up to 8K
node addresses. As networked nodes are added or removed or move from one speed domain to
the other, the DS880’s internal switch automatically keeps track.

www GarrettCom com

..

5