OfficeConnect ® Ethernet Hub 16C (3C16702A) User Guide
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Introduction 5 Environmental Statements 18 End Of Life Statement 18 Regulated Materials Statement 18 Environmental Statement about the Documentation 18 Environmental Statement about the Product Packaging 18 Creating Your Network 6 Ethernet Hub 16C—Front 6 Ethernet Hub 16C—Rear 7 Before You Start 8 Product Registration 8 Workstation Connections 8 Hub Connections 8 Stacking the Units together 9 The Rubber Feet 9 The Stacking Clip 9 Positioning Your OfficeConnect Hub 10 Securing the OfficeConnect Hub 10 Conn
INTRODUCTION Welcome to the world of networking with 3Com® . In the modern business environment, communication and sharing information is crucial. Computer networks have proved to be one of the fastest modes of communication but, until recently, only large businesses could afford the networking advantage. The OfficeConnect® product range from 3Com has changed this, bringing networks to the small office.
CREATING YOUR NETWORK Ethernet Hub 16C—Front Alert LED Power LED Collision LED Port Status LEDs Network Utilization LEDs orange Alerts you to excessive network use or an isolated (partitioned) 10BASE-T port. green Indicates that the power supply to the hub is present. yellow Flashes each time a collision is detected on the network. Collisions are part of normal network operation. green/yellow Indicates the status of each port.
Ethernet Hub 16C—Rear 7
2 An operating system (for example, Netware or Windows Before You Start 95/98) with network support configured, running on your workstations. Your OfficeConnect hub comes with: ■ One power adapter for use with the OfficeConnect hub. ■ Four rubber feet. ■ A stacking clip. ■ One Support and Safety Information Sheet ■ One Warranty Flyer 3 One ‘Straight-through’ 10BASE-T cable for every workstation or piece of equipment.
If you want to connect additional hubs using 10BASE-T, you need: ■ 4 Push the clip down gently to secure it, ensuring the fastening pieces snap into the slots on the unit. One ‘Straight-through’ 10BASE-T cable for each additional hub. To fit another unit: 1 Rest the second unit on top of the clip and align it with the front of the unit below.
Positioning Your OfficeConnect Hub Securing the OfficeConnect Hub When installing your OfficeConnect hub, ensure: There are two slots on the underside of the OfficeConnect hub which can be used for wall mounting. It is recommended that you mount the hubs with the LEDs facing upwards to prevent dust entering the cooling vents. ■ It is out of direct sunlight and away from sources of heat.
The hub detects all port connections, so you can start using your network immediately. When you need more ports, simply add more OfficeConnect hubs. Connecting Workstations and Other Equipment to Your Hub If you are using port 16 to connect to a workstation, ensure the Uplink/Normal switch is set to Normal (out). WARNING: Please read the ‘Important Safety Information’ sheet before you start.
Figure 3 Connecting Hubs Using 10BASE-2 (Coaxial) When using 10BASE-2 (Coaxial) cable, it is important that both ends of the segment are properly terminated with 50 Ohm terminators (end pieces). Only use 50 Ohm 10BASE-2 (Coaxial) cables and use a ‘Y’ piece for each hub. You can use ‘T’ pieces but ‘Y’ pieces provide optimum clearance of the other ports. Connect a 10BASE-2 ‘Y’ piece to each of your hubs. Daisy-chain each ‘Y’ piece with 10BASE-2 (Coaxial) cable to form a single segment (as shown in Figure 3).
Figure 4 Connecting Hubs Using 10BASE-T Correct Hub Connections Using 10BASE-T You can connect hubs together with 10BASE-T in a number of ways, but for simplicity we recommend the following method: 1 Starting from the bottom, connect port 16 of the lower PO W hub to port 15 of the hub immediately above. Repeat for each hub (as shown in Figure 4). COA X 2 Set all Uplink/Normal switches to Uplink (in) except for Cabling is secure and not pulled taut.
PROBLEM SOLVING The OfficeConnect hub has been designed to aid you when detecting and solving possible problems with your network. These problems are rarely serious; the cause is usually a disconnected or damaged cable, or incorrect configuration. If this section does not solve your problem, contact your supplier for information on what to do next. Link between two OfficeConnect hubs not working.
Refer to Figure 5 below to compare the wiring of a straight-through and a crossover cable.
NETWORKING TERMINOLOGY A Network is a collection of workstations (for example, IBM-compatible PCs) and other equipment (for example, printers), connected for the purpose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents. A Network Loop occurs when two pieces of network equipment are connected by more than one path. Your hub detects this and partitions (isolates) one of its ports to break the loop.
DIMENSIONS AND STANDARDS Dimensions and Operating Conditions 6.73 W 23.00 BThU/hr power requirement Functional: ISO 8802/3 IEEE 802.3 Safety: UL 1950 EN 60950 CSA 22.2 #950 IEC 60950 EMC: EN 55022 Class B† EN 55024 FCC Part 15 Class B†* ICES-003 Class B VCCI Class B† CNS 13438 Class A Environmental: EN 60068 (IEC 68) Various parts 228 mm (9.12 in.) 54.6 mm (2.1 in.) 0 to 40°C (32 to 105°F) operating temperature 0 to 90% (non-condensing) humidity Standards 960 g (2.1 lb) 185.4 mm (7.3 in.) + 15.
ENVIRONMENTAL STATEMENTS It is the policy of 3Com Corporation to be environmentally-friendly in all operations. To uphold our policy, we are committed to: End Of Life Statement 3Com processes allow for the recovery, reclamation and safe disposal of all end-of-life electronic components. ■ Establishing environmental performance standards that comply with national legislation and regulations. Regulated Materials Statement ■ Conserving energy, materials and natural resources in all operations.
REGULATORY NOTICES VCCI STATEMENT FCC STATEMENT This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules, and the Canadian Department of Communications Equipment Standards entitled, “Digital Apparatus,” ICES-003. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Wall mounting screw hole guide 142mm (5.6in.
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