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However, there is no guarantee that interference will not occur in a particular installation. If you suspect this equipment is causing interference, turn your hub on and off while your radio or TV is showing interference to determine the source of the interference. You can try to correct the interference by one or more of the following measures: 1. Reorient the receiving radio or TV antenna where this may be done safely. 2. To the extent possible, relocate the radio, TV or the other receiver away from the equipment. 3. Plug the computer which has the equipment installed into a different power outlet so that equipment and the receiver are on different branch circuits. If necessary, you should consult the place of purchase or an experienced radio/ television technician for additional suggestion. CAUTION : The phone jack cannot be connected to telephone system. Contents Chapter 1 Introduction ....................................1 Chapter 2 Features & Specifications .................3 Chapter 3 Package Contents .............................5 Chapter 4 Physical Description ........................6 Chapter 5 Installation ......................................9 Chapter 6 Trouble-shooting .............................12 1 Introduction Congratulations on your purchase of this rackmount stackable dual-speed hub. Migrating from traditional 10Mbps Ethernet to 100Mbps Fast Ethernet is now simple and affordable with these dual-speed hubs. These high performance 16-port, 24-Port, 32-port 10/100Mbps stackable dualspeed hubs are equipped with 16, 24, 32 RJ45 dual-speed ports, one uplink port and one internal 2-port switch. Typically a dual-speed hub has two independent internal network segments: 10Mbps segment and 100Mbps segment. Depending on the speed of attached network devices, each individual port of a dual-speed hub provides Auto-Negotiation capability which automatically senses and selects optimum speed at 10Mbps or 100Mbps. A 10Mbps network device attached to the dual-speed hub will be able to communicate with other network devices attached to the hub running at 10Mbps. On the other hand, a 100Mbps network device attached to the dual-speed hub will be able to communicate with other devices attached to the hub running at 100Mbps. Therefore, dual-speed hub can be 10Base-T hub when all the connecting nodes are running at 10Mbps as illustrated in Figure 1-1, or can be 100Base-TX hub when all the connecting nodes are running at 100Mbps as illustrated in Figure 1-2. These stackable dual-speed hubs are the ideal hubs for both 10Base-T and 100Base-TX networks. 10Mbps 100Mbps 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Uplink LNK/ACT 100M 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Power Switch 10M COL 1 3 5 10 30 50+ UTIL % 100M COL 1 3 5 10 30 50+ UTIL % 24-Port 10/100MbpsDual Speed Stackable Ethernet Huwitbh Internal Switch 10Mbps 100Mbps 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Uplink LNK/ACT 100M 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Power Switch 10M COL 1 3 5 10 30 50+ UTIL % 100M COL 1 3 5 10 30 50+ UTIL % 24-Port 10/100MbpsDual Speed Stackable Ethernet Huwitbh Internal Switch 1 Figure 1-1 10Mbps segment connecting 10Mbps devices Figure 1-2 100Mbps segment connecting 100Mbps devices 10Mbps 10Mbps 10Mbps 10Mbps 100Mbps 100Mbps 100Mbps 100Mbps Dual-Speed hub with internal switching function automatically switches data traffic between devices running at different speed, which allows communications between ports running at 10Mbps and ports running at 100Mbps. Dual-Speed hub with internal switching function can save money by eliminate the need to purchase expensive Switches for users with mixed speed network environment. The connection of the Dual- Speed hub with internal switching function is illustrated as in Figure 1-3: When you ready to expand your network, the Uplink port provides an easy way to connect to another hub with regular straight-through Category 5 cable These Dual Speed Hubs provide the stackable feature. They can stack together up to 6 hubs to form a logically Big dual-speed Hub. These Dual-Speed hubs can be set up as stand-alone units or it can be mounted on a standard 19" rack (rack mounting kits are included with the unit). Figure 1-3 Internal switch links 10Mbps and 100Mbps segments 10Mbps 100Mbps 10Mbps 100Mbps 10Mbps Internal Switch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Uplink LNK/ACT 100M 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Power Switch 10M COL 1 3 5 10 30 50+ UTIL % 100M COL 1 3 5 10 30 50+ UTIL % 24-Port 10/100MbpsDual Speed Stackable Ethernet Huwitbh Internal Switch 100Mbps 2 2 Features & Specifications (1) FeaturesConsists of one internal 10Mbps Ethernet segment and one internal 100Mbps Fast Ethernet segment. Supports Auto-Sensing RJ45 ports which automatically sense and select optimum speed and route data traffic to corresponding internal segments. Built-in U...
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