Magnum DS 880 Corporate Headquarters 10 / 100 Dual-Speed Stackable Hubs GarrettCom, Inc. 47823 Westinghouse Dr. Fremont, CA 94539-7437 Phone (510) 438-9071 Fax (510) 438-9072 Website: http://www.GarrettCom.com email support@garrettcom.com I n s t a l a Installation and User Guide www . GarrettCom . com www . GarrettCom .
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.
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 (510) 438-9071 Fax (510) 438-9072 Website: http://www.GarrettCom.com email support@garrettcom.
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.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) TABLE OF CONTENTS PAGE 1.0 SPECIFICATIONS...................................................................................................... 1 1.1 Technical Specifications ..................................................................................... 1 1.2 Ordering Information .......................................................................................... 3 2.0 INTRODUCTION .......................................
Magnum DS880 Dual-speed Stackable Hubs 1.0 SPECIFICATIONS 1.1 Technical Specifications Installation and User Guide(05/01) 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.
Magnum DS880 Dual-Speed Stackable Hubs (1.1 Technical Specifications, continued) Installation and User Guide (05/01) 48VDC Power Supply (Optional) Power Input Voltage : 36 to 72 VDC (auto ranging) Terminal Block in rear: “-, GND, +” Power Consumption: 20 watts max.
Magnum DS880 Dual-Speed Stackable Hubs 1.2 Installation and User Guide (05/01) Ordering Information Magnum DS880 Dual-Speed Stackable Hubs Magnum DS880-A: Dual-Speed 10/100 Stackable Hub with eight RJ-45 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.
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.
Magnum DS880 Dual-Speed Stackable Hubs 2.2 Installation and User Guide (05/01) Product Description - General Magnum DS880 Dual-Speed hubs have eight RJ-45 ports, each 10/100Mb auto- sensing. 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.
Magnum DS880 Dual-Speed Stackable Hubs 2.2 Product Description - General (continued) 1 PWR BR ACT LK RX 1 2 7 8 2 3 4 5 6 7 DS880B Bridge Module DS880A COL Installation and User Guide (05/01) 8 UPLINK 3 4 5 6 PWR BR 1 2 ACT LK COL RX 3 4 5 6 7 8 1 2 3 4 5 6 7 8 UPLINK Figure 2.2.2 : DS880B is a DS880A with a bridge module built-in for 10 to 100 bridging Only one DS880-B unit is needed to support a stack. Additional 8-port units of the DS880-A “add-on” hubs . . .
Magnum DS880 Dual-Speed Stackable Hubs 2.2.1 Installation and User Guide (05/01) Magnum DS880 Chassis The Magnum DS880 chassis houses one main PC board, a bridge module daughter- board in the Model DS880-B, and an internal power supply unit. The front side of the chassis has eight RJ-45 twisted-pair ports and one cascading (UP-LINK) switch for Port 8 on the right. LEDs to indicate operating status are on the left front side. There are power (PWR) and bridge-inside (BR) indicators for the unit.
Magnum DS880 Dual-Speed Stackable Hubs 2.3 Installation and User Guide (05/01) Stacking Magnum DS880s Up to four Magnum DS880s can be stacked to operate as one 10/100 dual-speed repeater with up to 32 dual-speed ports. Normally, one Magnum DS880-B hub per stack is needed to provide a switched interconnection between the two separate OUT IN OUT IN OUT IN OUT IN 100Mb and 10Mb traffic domains in the stack. Additional stacked units are normally Model DS880-A “add-on” units, which cost less.
Magnum DS880 Dual-Speed Stackable Hubs 2.4 Installation and User Guide (05/01) Bridge Module between the 10Mb and 100Mb Domains Bridge Module Figure 2.4 : Internal view of DS880-B with bridge module installed Magnum DS880-B’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.
Magnum DS880 Dual-Speed Stackable Hubs 2.6 Installation and User Guide (05/01) Features and Benefits Supports 10 or 100Mb network connections on each of eight RJ-45 ports Magnum DS880 Dual-Speed 10 / 100 hubs combine two logical hubs . . . one at 10Mb and one at 100Mb . . . in one physical box supporting two traffic domains. Each port can operate at either 10 or 100Mb, independently of the other ports.
Magnum DS880 Dual-Speed Stackable Hubs 2.7 Installation and User Guide (05/01) Applications Example 1 : A Magnum DS880-B serves a small office with mixed speed requirements. Some users operate at 100Mb, and some users and utility devices (such as print servers) run at 10Mb. All share the same hub, and talk to each other via the bridge module inside. Any node can change speed at any time without affecting network operation or impacting other users.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) Example 3 : For additional expansion, DS880s can be expanded by stacking DS880-A “add-on” units. The additional stacked ports are all auto-sensing dual-speed, and can be used at either 10Mb or 100Mb on a per-port basis. The stacking cables connect the DS880 units and carry the signals for both the 100Mb and the 10Mb domains.
Magnum DS880 Dual-Speed Stackable Hubs 3.0 Installation and User Guide (05/01) Magnum DS880 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 500C. 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.
Magnum DS880 Dual-Speed Stackable Hubs 3.1.2 Installation and User Guide (05/01) Wall (or Vertical Surface) Mounting Each Magnum DS880 Dual-Speed Hub 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 attaching to the Magnum DS880 through the round hole of the bracket.
Magnum DS880 Dual-Speed Stackable Hubs 3.2.2 Installation and User Guide (05/01) 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.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) 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 must 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.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) lengths are up to 100 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.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) Instructions for connecting the Magnum DS880 Dual-Speed Hubs to the various Fast Ethernet media are given in the following sections. 3.2.3 Connections to NICs which support Auto-Negotiation The Magnum DS880 Dual-Speed Hub will function properly with NICs (Network Interface Cards) which support Auto-Negotiation.
Magnum DS880 Dual-Speed Stackable Hubs 4.0 Installation and User Guide (05/01) OPERATION This chapter describes the function and operation of the Magnum DS880 hubs. 4.1 Dual-Speed Functionality The Magnum DS880-A handles the two different traffic domains separately (unless it is stacked with a DS880-B). The DS880-B provides switched (bridged) connectivity between the Ethernet (10Mb/s) and Fast Ethernet (100Mb/s) domains.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) Packet Source Destination Address Table Filter/Forward Source Address Address Maintenance Action 10 Mb Not in table Not in table Add source to table Forward 10 Mb Not in table In table Add source to table Filter 10 Mb In table Not in table None Forward 10 Mb In table In table None Filter 100 Mb Not in table Not in table Add source to table Forward 100 Mb Not in table In table Add source to table Filter 100 Mb In table Not in table No
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) Port Speed Settings for 10,100Mbps Or 10/100Mbps Mode only Port 3 SW3 SW2 Port 2 Port 1 ON 10/100 Port 8 Port 7 Port 6 Port 5 ON 100 1 2 3 4 5 6 7 8 10/100 Port 4 OFF 100 1 2 3 4 5 6 7 8 4.2 OFF Figure 4.2: Switch Settings for 10/100Mbps and 100Mbps Speed The latest Magnum DS880 unit is equipped with Switches for setting Port Speed.
Magnum DS880 Dual-Speed Stackable Hubs 4.3 Installation and User Guide (05/01) Auto-negotiation and speed-sensing All eight RJ-45 ports independently support auto-negotiation for shared 10BASE-T and 100BASE-TX modes. When the ‘100’ LED is flashing, it means that the corresponding port is sending out auto-negotiation pluses out that port. When a connection is made, the other device should respond and both sides should agree to the speed being advertised.
Magnum DS880 Dual-Speed Stackable Hubs 5.0 Installation and User Guide (05/01) TROUBLESHOOTING All Magnum Ethernet products are designed to provide reliability and consistently high performance in all network environments. The installation of the Magnum DS880 10/100 Dual Speed Stackable Hub is a straightforward procedure (see INSTALLATION, Section 2.6); the operation is also straightforward and is discussed in Section 4.
Magnum DS880 Dual-Speed Stackable Hubs 5.2 Installation and User Guide (05/01) 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.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) GarrettCom will carefully test and evaluate all returned products, will repair products that are under warranty at no charge, and will return the warranty-repaired units to the sender with shipping charges prepaid (see Warranty Information, Appendix A, for complete details). However, if the problem or condition causing the return cannot be duplicated by GarrettCom, the unit will be returned as: No Problem Found.
Magnum DS880 Dual-Speed Stackable Hubs Installation and User Guide (05/01) APPENDIX B : Optional 48V DC Power Supply, Addendum B1.0 SPECIFICATIONS - FOR DUAL-SPEED DS880 HUBS Power Supply (Internal 48 VDC Option) DC Power Connector: 3 terminals: “-“, “GND”, “+” Input Voltage: 36 - 70 VDC (auto-ranging) Power Consumption: Model DS880: 12 watt typical, 20 watts max.
Magnum DS880 Dual-Speed Stackable Hubs B4.0 Installation and User Guide (05/01) INSTALLATION This section describes the installation of the 48 VDC power source leads to the 48 VDC power terminal block on the Magnum DS880s. (see figure below). _ Figure B4.1: 48 VDC Terminal Block GND + ON on Magnum DS880-48VDC OFF The 48 VDC terminal block on the Magnum DS880s is located on the rear of the unit and is equipped with three (3) 36-70VDC screw-down lead posts.
