3Com 3CNJ100 - Manuals

1 The 3Com Network Jack is a 4-port, unmanaged Ether net switch that fits into any standard electrical wall outlet or data port opening. The Network Jack brings switching capabilities to any single port on an Ethernet network by allowing up to four networking devices, such as computers, printers, Vo...

Installation Guide 2 About the Network Jack The following diagram shows the front view of the Network Jack. 3 2 1 4 1 2 3 4 5

Installation Guide 4 The following diagram shows the back view of the Network Jack. C US Net wo rk In terf ace No de Mo del 3C3 000 AS SE MB LE D IN U.S. A. Tes ted to C om ply with FC C St and ard s 1 3 2 4

Installation Guide 6 Before You Begin Before you begin installation, register your product at: www.3com.com/productreg. The Network Jack is available in single- and 20-packs. Before you begin the installation, make sure you have the following items, which are included with the Network Jack: ■ 6x32 s...

Obtaining Optional Components 7 Obtaining Optional Components The Network Jack works with the following optional components, all of which are available from 3Com. Order online at www.3com.com or by calling 1-877-949-3266. Component Purpose 3C Number(s) Adapter plates For installing pass-through port...

Installation Guide 8 Installing the Network Jack Installing the Network Jack consists of the following steps: 1 Set up the power supply (page 10). 2 Set the Power Over Ethernet dip switches (page 13; optional, required only if your network supports Power Over Ethernet or if you are using a single-po...

Installing the Network Jack 9 8 Connect the local power supply (page 23; optional) not required if your network supports Power Over Ether net or if you are using a single-port or multi-port power supply). 9 Connect network devices to the Network Jack (page 23). The following diagram displays an over...

Installation Guide 10 Setting up the Power Supply Power to the Network Jack can be supplied one of the following ways: ■ Over the network via an integrated switch that supports Power Over Ethernet. ■ Over the network via a multi-port Ether net power supply. ■ Over the network via a single-port Ether...

Installing the Network Jack 11 The multi-port Ethernet power supply from 3Com connects to an existing Ethernet or Fast Ethernet infrastructure with standard Category 5 or Category 5e UTP cabling, and powers up to 24 Network Jacks. See “Obtaining Optional Components” on page 7 for ordering informatio...

Installation Guide 12 Using a Single-port Ethernet Power Supply To use a single-port power supply, connect the power supply to the network hub or switch and to the Network Jack, as shown in the following illustration. See “Obtaining Optional Components” on page 7 for ordering information. For comple...

Installing the Network Jack 13 Setting the Power Over Ethernet Dip Switches If your network switch or power supply supports Power Over Ethernet, you must set the dip switches on the Network Jack to the appropriate setting: Capacitive Power Discovery/24V, Capacitive Power Discovery/48V, or IEEE 802.3...

Installation Guide 14 2 Set the appropriate dip switches (labeled 3 and 4) for the type of Power Over Ethernet supported. The default setting is IEEE 802.3af-compatible Power Over Ether net. 3 Replace the dip switch cover. Power Over Ethernet Supported Dip Switch Numbers Setting Capacitive Power Dis...

Installing the Network Jack 15 Installing the Adapter Plate and Pass-Through Ports If you want to install the blank adapter plate, or if you want to use pass-through ports for connecting an analog or PBX digital telephone or for setting up a connection to a separate network segment, purchase support...

Installing the Network Jack 17 Planning the Installation When installed, the back of the Network Jack extends into a wall or cubicle opening 1.5 inches. Because the depth of some wall and cubicle openings differ, observe the following requirements and recommendations before installing the Network Ja...

Installation Guide 18 ■ Make sure the distance between the back of the Network Jack and the inside of the wall or cubicle opening is at least 1.5 inches (3 inches is recommended). ■ To ensure proper horizontal cabling functionality, adhere to the following network cabling standards during installati...

Installing the Network Jack 19 Setting up the Network Cabling at Your Site The network cabling at your site (from the wiring closet to the wall or cubicle opening) may already be installed. If it is not, install the cabling following these general guidelines. 1 Connect one end of an Ethernet cable t...

Installation Guide 22 Mounting the Network Jack After connecting the Network Jack to the network, use the two provided screws to mount the Network Jack in any standard NEMA-WD6 cubicle opening or wall outlet. If the cubicle or wall opening has a depth of fewer than fi ve inches, does not support the...

Installing the Network Jack 23 Connecting the Local Power Supply (Optional) If your network does not support Power Over Ether net, or if you are not using a single-port or multi-port Ether net power supply, you must purchase a local power supply from 3Com (see “Obtaining Optional Components” on page...

Installation Guide 24 Checking the LEDs You can verify the Network Jack installation by checking the LEDs. Troubleshooting the Network Jack If you encounter problems with the Network Jack: ■ Verify the Network Jack is receiving power by viewing the Power LED (it should be lit). If the Power LED is n...

Troubleshooting the Network Jack 25 If using Power Over Ethernet, make sure the other end of the network cable is plugged into a switch on the network that has Power Over Ethernet integrated into it, or one that feeds into an external midspan power supply that supports Power Over Ethernet. ■ Local p...

Installation Guide 26 Specifications Hardware Power consumption 5 watts without power forwarding Maximum 13 watts with power forwarding (depending on the device drawing power) Network Interface 10 Mbps Ethernet 10BASE-T Ethernet IEEE 802.3 industry standard for a 10 Mbps baseband CSMA/CD local area ...

Specifications 27 Performance Auto-negotiation Communication speed (10 Mbps or 100 Mbps) and duplex mode (full or half) is determined through auto-negotiation with the attached devices. The Network Jack attempts to negotiate the fastest connection possible (100 Mbps full-duplex). Environment Operati...

Installation Guide 28 Contacting Technical Support 3Com provides easy access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the most recent information, 3Com recomme...

Contacting Technical Support 29 Online Technical Services 3Com offers worldwide product support 24 hours a day, 7 days a week, through the following online systems: ■ World Wide Web site ■ 3Com Knowledgebase Web Services ■ 3Com FTP site World Wide Web Site To access the latest networking information...

Installation Guide 30 3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the 3Com public FTP site. This service is available 24 hours a day, 7 days a week. To connect to the 3Com FTP site, enter the following information into your FTP client: ■ Host name: ftp.3com.c...

Contacting Technical Support 31 Support from 3Com If you are unable to obtain assistance from the 3Com online technical resources or from your network supplier, 3Com offers technical telephone support services. To find out more about your support options, call the 3Com technical telephone support ph...

3Com Corporation Limited Warranty This warranty applies to customers located in the United States, Australia, Canada (except Quebec), Ireland, New Zealand, U.K., and other English language countries, and countries for which a translation into the local language is not provided 3Com ® Network Jack H ...

Limited Warranty and Regulatory Compliance Information FCC Class A Verification Statement WARNING: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules, and the Canadian Department of Communications Equipment Standards ...