3Com 10BASE-T manual Mounting KIT Instructions, Problem Solving

Page 4

Power Supply

Power problems can be the cause of serious failures and down- time in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen net- work outages. We recommend that you install power condition- ing, especially in areas prone to black outs, power dips and electrical storms.

he unit is intended to be grounded. Ensure it is connected to earth ground during normal use. Installing proper grounding helps to avoid damage from lightning and power surges.

Power Up

Use the following sequence to power up the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T:

Check the network connections and cables.

Connect the power supply cable to the appropriate power

Tsocket on the rear panel of the unit; refer to 7 or 8.

Connect the plug to the power supply outlet socket and switch on the power supply at the socket. If you are using

the Advanced Redundant Power System, ensure it is pow- ered on.

When the switch is powered on, the Power/Self Test LED should first flash green, then stay lit. If it does not, refer to 6.

Spot Checks

At frequent intervals you should visually check the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T. 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 the following:

Cabling

Check that all external cabling connections are

 

secure and that no cables are pulled taut.

Cooling fans

Where possible, check that the cooling fans are

 

operating by listening to the unit. The fans are

 

fitted near to the front right hand side of the

 

unit (when viewed from the front).

If you experience any problems operating the Baseline 10/100 Switch

24Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T, refer to “Problem Solving” on page 4.

MOUNTING KIT INSTRUCTIONS

Introduction

The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T 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 19-inch rack and secure with suitable screws (not provided).

6Reconnect all cables.

Rack Mounting the Units

he Baseline 10/100 Switch is 1U high and will fit a standard 19-inch rack.

CAUTION: Disconnect all cables from the unit before continuing. Remove the self-adhesive pads from the underside of unit, if already fitted.

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.

PROBLEM SOLVING

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:

Link Status LED not lit for a port that has a connection.

here 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. That you are using a TP cable that is:

‘Straight through’, to connect an MDIX port to an MDI port.

‘Cross-over’, to connect an MDIX port to an MDIX port, or an MDI port to an MDI port.

TThe cable 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-

Tplied with the unit)

A brief description of the fault

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Contents Introduction DUA1646-7AAA02Connecting to a Network Device Connecting to another Switch or HubFront Panel 1000BASE-T PortInstallation Recommendations Positioning the SwitchRear Panel Connections Rack Mounting or Free StandingProblem Solving Mounting KIT Instructions’INFORMATION DE Sécurité Importante Safety InformationWichtige Sicherheitsinformationen Technical Information Limited WarrantyRelated Standards Regulatory Notices ProductsTechnical Support Legal NoticesFollowing numbers may be used for technical support United States Government Legends