Connecting to a Network Device
Follow these guidelines to connect a device to the Baseline 8 Port Gigabit Switch:
Use Category 5 unshielded or shielded (screened) 100 Ohm TP cable (or Category 3 cable for a 10 Mbps connection).
The maximum length of cable for each connection is 100 m (328 ft).
Connect one end of the cable to an
Power Supply
Power problems can be the cause of serious failures and downtime in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages. 3Com recommends that you install power conditioning, especially in areas prone to black outs, power dips and electrical storms.
The unit is intended to be grounded. Ensure it is connected to earth ground during normal use. Grounding the unit helps to avoid damage from lightning and power surges.
Powering Up
Use the following sequence to power up the Baseline 8 Port Gigabit Switch:
1Check the network connections and cables.
2Connect the power supply cable to the appropriate power socket on the rear panel of the unit; see reference 5 in “Features of the Baseline 8 Port Gigabit Switch.”
3Connect the plug to the power supply outlet socket and switch on the power supply at the socket.
When the switch is powered on, the Power LED lights green. If it does not, see reference 4 in “Features of the Baseline 8 Port Gigabit Switch.”
MOUNTING KIT INSTRUCTIONS
Introduction
The Baseline 8 Port Gigabit Switch is supplied with two mounting brackets and four screws. These are used for rack mounting the unit. When mounting the unit, you should take note of the guidelines given in “Positioning the Switch” on page 3.
3Insert the two screws supplied in the mounting kit and fully tighten with a suitable screwdriver.
4Repeat the two previous steps for the other side of the unit.
5Insert the unit into the
6Reconnect all cables.
Rack Mounting the Units
The Baseline 8 Port Gigabit Switch is 1U high and will fit a standard
CAUTION: Disconnect all cables from the unit before continuing. Remove the
1Place the unit the right way up on a hard, flat surface with the front facing towards you.
2Locate a mounting bracket over the mounting holes on one side of the unit (refer to the figure following step 6).
PROBLEM SOLVING
At frequent intervals you should visually check the Baseline 8 Port Gigabit Switch. Regular checks can give you an early warning of a possible failure; any problems can then be attended to when there will be least effect on users.
Check that all external cabling connections are secure and that no cables are pulled taut.
Refer to the information about LEDs given earlier in this guide to see if the problem can be identified and rectified. Here are some common problems that can occur:
Activity Status LED not lit for a port that has a connection. There is a problem with this connection. Check that:
The device being connected to is powered on and operating correctly.
The cable is connected at both ends.
You are using a TP cable that is not damaged.
If the connection is to a workstation, that the workstation’s network interface is installed and configured correctly.
All Activity LEDs appear to be lit continually. There may be broadcast storms on the network. Remove port connections one at a time, waiting a few seconds between each port. If the LEDs go off after removing a port connection, the device that was connected to that port is introducing an excessive amount of broadcast frames to the network (some pieces of network equipment operate by sending out broadcast frames regularly). Refer to the documentation that accompanies the device for information on disabling the broadcast operation.
If the problem persists and the unit still does not operate successfully, contact your supplier with the following information before returning the unit:
Product number and serial number (printed on a label sup- plied with the unit)
A brief description of the fault
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