3Com 3C16467 Gebruikershandleiding - Pagina 4

Blader online of download pdf Gebruikershandleiding voor {categorie_naam} 3Com 3C16467. 3Com 3C16467 9 pagina's. Superstack 3 baseline 10/100 switch 24-port 10base-t/100base-tx plus 1-port 1000base-t (3c16467)

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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.

The 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

socket 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

OUNTING

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.

Rack Mounting the Units

The 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.

1 Place the unit the right way up on a hard, flat surface with

the front facing towards you.

2 Locate a mounting bracket over the mounting holes on one

side of the unit.

ROBLEM

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.

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.

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.

The 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

NSTRUCTIONS

OLVING

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

24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T, refer to

"Problem Solving" on page 4.

3 Insert the two screws supplied in the mounting kit and fully

tighten with a suitable screwdriver.

4 Repeat the two previous steps for the other side of the unit.

5 Insert the unit into the 19-inch rack and secure with suitable

screws (not provided).

6 Reconnect all cables.

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