Start Here Congratulations on your purchase of the NETGEARTM Model EN104, Model EN108, or Model EN116 Ethernet hub. The hubs deliver standards-based, plugand-play networking solutions for small businesses, home offices, and lowdensity workgroups of larger companies. In this installation guide, all three hubs are referred to collectively as the Model EN104/EN108/EN116 hub. Each hub is listed individually when information is provided that refers to a specific model. Features The Model EN104/EN108/EN116 hub has the following features: · Four (on the Model EN104 hub), eight (on the Model EN108 hub), and sixteen (on the Model EN116 hub) vista 10BASE-T network ports (RJ-45) that provide 10 megabit per second (Mbps) networking using simple unshielded twisted pair (UTP) wiring Built-in LED indicators for at-a-glance status checks by vista networks ports AUI (not on the Model EN104 hub) or coaxial BNC backbone support for connecting to an existing Ethernet segment or external transceiver, or for network expansion by connecting multiple hubs together using twisted pair or coaxial cabling Uplink port for connecting to other hubs using simple straight-through cables Clear front-panel light-emitting diode (LED) indicators to monitor overall hub status Plug-and-play installation with no software to configure Complete hub functions including packet retiming, collision detection, preamble regeneration, and fragment extension Automatic partitioning and reconnection of a port that has excessive collisions or is jabbering Automatic polarity detection for recognizing and correcting incorrect polarity on the receive pair Compact design, enabling easy tabletop or rack-mounting installation External power adapter Limited lifetime warranty on the unit and three-year warranty on the power supply · · · · · · · · · · · Model EN104/EN108/EN116 Ethernet Hub Installation Guide Package Contents Model EN104 hub 10 BASE-T HUB Model EN108 hub or 10 BASE-T HUB EN104 LINK Rx Pwr Col EN108 LINK Rx Pwr Col 1 2 3 4 5 6 7 8 or Model EN116 hub 10 BASE-T HUB Pwr Col EN116 LINK Rx 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Power adapter Mounting kit Installation guide, Warranty & Owner Registration Card, Support Information Card 8731FA Verify that your package contains the following: · · · · · · · Model EN104 hub, Model EN108 hub, or Model EN116 hub Mounting kit (for wall installation) BNC T-connector and BNC 50 terminator (only if you have purchased the Model EN108 hub or the Model EN116 hub) This installation guide Warranty & Owner Registration Card Support Information Card Power adapter Model EN104/EN108/EN116 Ethernet Hub Installation Guide Product Illustration Front Panel of the Model EN104 hub 10BASE-T ports Pwr (Power) Col (Collision) 10 BASE-T HUB EN104 LINK Rx Pwr Col Normal/Uplink push button Front Panel of the Model EN108 hub 10 BASE-T HUB Pwr Col EN108 LINK Rx 1 2 3 4 5 6 7 8 Front Panel of the Model EN116 hub 10 BASE-T HUB Pwr Col EN116 LINK Rx 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 8732FA Vista 10BASE-T Network Ports with Built-in LEDs The front panel of the Model EN104 hub has four RJ-45 10BASE-T ports, the Model EN108 hub has eight RJ-45 10BASE-T ports, and the Model EN116 hub has sixteen RJ-45 10BASE-T ports. Two LEDs--the Link LED and the Rx LED--are built into each 10BASE-T port. Link LED Rx LED 8724EA Model EN104/EN108/EN116 Ethernet Hub Installation Guide LEDs The table below describes the activity of the LEDs. Label Pwr (Power) Col (Collision) Color Green Amber Activity Description On Blinking Power is supplied to the hub. Data collision is occurring on the network. Note that occasional collisions are normal. The link between this port and the connected device is good. Link (located on the top left corner of each vista 10BASE-T port) Rx (located on the top right corner of each vista 10BASE-T port) Active (for BNC) Rx (for BNC) Active (for AUI) Rx (for AUI) Green On Green Blinking There is incoming data on the port. Green Green Green Green On Blinking On Blinking The link between the BNC port and the connected device is good. There is incoming data on the BNC port. The link between the AUI port and the connected device is good. There is incoming data on the AUI port. Normal/Uplink Push Button The Normal/Uplink push button allows you to select Normal (MDI-X) wiring for direct PC connection. The push button also allows you to select Uplink (MDI) wiring for connection to a hub or a switch through port 4 on the Model EN104 hub, port 8 on the Model EN108 hub, or port 16 on the Model EN116 hub. This uplink configuration eliminates the need to use a crossover cable. The other 10BASE-T ports are permanently configured for normal wiring for connection to a PC. Model EN104/EN108/EN116 Ethernet Hub Installation Guide Rear Panel The rear panel of the hub has a BNC port that you can use to connect to a backbone network or other PCs using thin coaxial cable. The rear panel of the Model EN108 hub and the Model EN116 hub also has an AUI port in addition to the BNC port. You can use the AUI port with the appropriate transceiver to connect the hub to a backbone network using thin coaxial cable, thick coaxial cable, fiber optic cable, or 10BASE-T wiring. The rear panel also includes a DC power receptacle. BNC port LEDs BNC port Active Rx BNC 12Vdc 1.2A -- + Rear Panel of the Model EN104 hub AUI port LEDs AUI port Power receptacle Active Rx AUI Active Rx BNC 12Vdc 1.2A -- + Rear Panel of the Model EN108 hub Active Rx AUI Active Rx BNC 12Vdc 1.2A -- + Rear Panel of the Model EN116 hub 8738FA Model EN104/EN108/EN116 Ethernet Hub Installation Guide Installation Procedures Prepare the Site Before you begin installing your hub, prepare the installation site. Make sure your operating environment meets the operating environment requirements of the equipment. Characteristic Temperature Requirement Ambient temperature between 0° and 40° C (32° and 104° F). No nearby heat sources such as direct sunlight, warm air exhausts, or heaters. Maximum relative humidity of 90%, noncondensing. Minimum 2 inches (5.08 cm) on all sides for cooling. Adequate airflow in room or wiring closet. At least 6 feet (1.83 m) to nearest source of electromagnetic noise (such as photocopy machine or arc welder). Minimum 12 inches (19.68 cm) front and back for service access and maintenance. Front and back clearance for cables and wiring hardware such as punchdown blocks. Adequate power source within 6 feet (1.83 m). Wiring hardware, such as punchdown blocks or patch panels, should be complete before installing the hub. Operating humidity Ventilation Operating conditions Service access Power Wiring hardware Install the Hub To install your hub on a flat surface, you do not need any special tools. Be sure the hub is positioned with at least 2 inches of space on all sides for ventilation. To install the hub on a wall, measure the distance between the mounting holes on the back of the hub and mark the wall to match the location of the mounting holes on the hub. At the marked location, screw into the wall the two screws that you received with the mounting kit included in your package contents. Be sure to choose a location that is near the devices to be connected, is close to an electrical outlet, and provides at least 2 inches of space all around the hub for ventilation. Model EN104/EN108/EN116 Ethernet Hub Installation Guide Connect a PC to the Hub You can connect PCs, Apple Macintosh computers, UNIX workstations, or any device equipped with a 10BASE-T Ethernet interface to the RJ-45 ports on your hub by using twisted pair Ethernet cables. To connect any of the RJ-45 ports on your hub to a PC, use a regular straightthrough UTP cable. If you are connecting using port 4 on the Model EN104 hub, port 8 on the Model EN108 hub, or port 16 on the Model EN116 hub, set the Normal/Uplink push button to Normal. (The Model EN108 hub is shown in the illustration.) Pwr Col 1 2 3 4 5 6 7 8 Normal/U plink 8734FA Note: Ethernet specifications limit the cable length between your PC or server and the hub to 328 feet (100 meters) in length. Model EN104/EN108/EN116 Ethernet Hub Installation Guide Connect the Hub to a Network Cascading refers to connecting hubs together to increase the number of ports or the number of users supported on the network. The 10BASE-T ports can be used to cascade hubs together. The twisted pair cable extended from a 10BASE-T port (or UTP port) is called a twisted pair segment and can be up to 100 meters (m) in length. The 10BASE-T ports, with the exception of port 4 on the Model EN104 hub, port 8 on the Model EN108 hub, or port 16 on the Model EN116 hub, are MDI-X (or Normal) ports. Use the following table as a guide for selecting the appropriate network cable. Connecting Port on the Hub Model EN104 hub: Ports 1­3 Ports 1­3 Model EN108 hub: Ports 1­7 Ports 1­7 Model EN116 hub: Ports 1­15 Ports 1­15 PC, server, or router Hub or switch Straight-through cable Crossover cable PC, server, or router Hub or switch Straight-through cable Crossover cable PC, server, or router Hub or switch Straight-through cable Crossover cable Connecting Device Cable Used Set the Normal/Uplink Push Button If you are connecting to port 4 on the Model EN104 hub, port 8 on the Model EN108 hub, or port 16 on the Model EN116 hub, use the following table. Determine the type of cable to use and how to set the Normal/Uplink push button. Connecting Port Connecting Device Cable Used Straight-through cable Straight-through cable Port 4, port 8, or port 16 set to PC, server, or router Normal Port 4, port 8, or port 16 set to Hub or switch Uplink Model EN104/EN108/EN116 Ethernet Hub Installation Guide Cascade the Hub The following illustration shows cascading hubs together in a hierarchical star through the 10BASE-T ports and indicates the setting of the Normal/Uplink push button on each hub. Hub 1 10 BASE-T HUB Pwr Col EN116 LINK Rx 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Normal Hub 2 10 BASE-T HUB Hub 3 10 BASE-T HUB Pwr Col EN108TP Pwr EN108TP 1 2 3 4 5 6 7 8 Uplink Col 1 2 3 4 5 6 7 8 Uplink Hub 4 Uplink Hub 5 Uplink A B 8735FA Note: Ethernet specifications limit the number of hubs with twisted pair links in any communication path to five, as shown in the example. When PC "A" communicates with PC "B," the communication path goes from hub 4 to hub 2, to hub 1, to hub 3, and then to hub 5. The following illustration shows cascading hubs together daisy-chain style and indicates the setting of the Normal/Uplink push button on each hub. Model EN104 hub 10 BASE-T HUB EN104 LINK Rx Pwr Col Normal Model EN108 hub 10 BASE-T HUB Pwr Col EN108 LINK Rx 1 2 3 4 5 6 7 8 Uplink Model EN116 hub 10 BASE-T HUB Pwr Col EN116 LINK Rx 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Uplink 8733FA Model EN104/EN108/EN116 Ethernet Hub Installation Guide Connect to a Network Using the BNC Port The BNC port on the rear panel of the hub is used for connecting to a thin coaxial segment. You can connect other Model EN104/EN108/EN116 hubs, servers, workstations, or other devices to the BNC port. A BNC-T connector is inserted in the port, and the 50 terminator terminates the connection at each end device. By using the BNC port for cascading, you treat each connected hub as just another node on the coaxial segment. The separation marks in the coaxial cable between the hubs in this illustration represent the incorporation of other devices and show that interconnection is not limited to hubs. BNC T- connector Model EN104 hub BNC 50 terminator Model EN108 hub Model EN116 hub BNC 50 terminator 8736FA Note: Ethernet specifications limit a BNC segment to 30 BNC connections, specify a minimum of 1.64 feet (0.5 m) between any two stations, and limit segments to 607 feet (185 m) in length. Model EN104/EN108/EN116 Ethernet Hub Installation Guide Connect to a Network Using the AUI Port The AUI port on the rear panel (found only on the Model EN108 hub and the Model EN116 hub) is normally used for connecting a thick coaxial segment. With the right type of transceiver, you can use the AUI port to connect to most types of network media, including 10BASE-T twisted pair cable or thin coaxial, thick coaxial, and 10BASE-FL fiber optic cables. Note: All transceivers connected to the AUI port must have the signal quality error (SQE) test function disabled. Refer to your transceiver documentation for information about disabling the SQE test function. Cable terminator device AUI cable Thick coaxial cable 10BASE-5 transceiver Model EN108 hub and Model EN116 hubs 8737FA Note: Ethernet specifications limit thick coaxial segments to 100 stations and 1,640 feet (500 m) in length, and they specify that the AUI cable between the hub and the transceiver is limited to 164 feet (50 m ...