3COM 10BASE-T User Manual

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3COM 10BASE-T User Manual

SuperStack® 3 Baseline 10/100 Switch 24-Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T (3C16467) User Guide

DUA1646-7AAA02

INTRODUCTION

The SuperStack® 3 Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T is a versatile, easy-to-use unmanaged switch. It is ideal for users who want the high-speed performance of 10/100 switching with the added functionality of a 1000BASE-T link but do not need sophisticated management capabilities. The Baseline 10/100 Switch is shipped ready for use. No configuration is necessary.

The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T has 24 shielded RJ-45, 10/100Mbps auto-negotiating ports and one shielded RJ-45, 1000BASE-T port on the front panel. Each 10/100Mbps port automatically determines the speed and duplex mode of the connected equipment and provides a suitable switched connection. The 1000BASE-T port is a fixed speed port that operates in full duplex mode.

The Baseline 10/100 Switch is suited for office use where it can be free standing, or rack mounted (in a wiring closet or equipment room).

The Baseline 10/100 Switch comes with:

TOne power cord

TFour self-adhesive rubber pads

TOne mounting kit

The Switch can be powered either from the AC mains supply, or through an optional 3Com SuperStack 3 Advanced Redundant Power System (3C16071B). Contact your supplier for details.

The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T provides high performance switched connections to 10Mbps and 100Mbps hubs, servers and workstations that need a dedicated switched link and a switched fixed speed 1000 Mbps port that can connect to other 1000BASE-T ports or servers/workstations.

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HOW TO USE THE BASELINE 10/100 SWITCH 24-PORT

The numbers in this diagram refer to numbered sections in the text.

Front Panel

1 24 RJ-45 10/100 Ports and 1 RJ-45 1000 Port

WARNING: RJ-45 ports. These are shielded RJ-45 data sockets. They cannot be used as telephone sockets. Only connect RJ-45 data connectors to these sockets. Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets.

AVERTISSEMENT: Les ports RJ-45. Il s’agit de prises femelles blindées de données RJ-45. Vous ne pouvez pas les utiliser comme prise de téléphone. Branchez uniquement des connecteurs de données RJ-45 sur ces prises femelles. Les câbles de données blindés ou non blindés, avec les jacks blindés ou non blindés, l’un ou l’autre, peuvent être branchés à ces prises de courant de données.

WARNUNG: RJ-45-Anschlüsse. Dies sind abgeschirmte RJ-45-Datenbuchsen. Sie können nicht als Telefonanschlußbuchsen verwendet werden. An diesen Buchsen dürfen nur RJ-45-Datenstecker angeschlossen werden. Diese Datenstecker können entweder mit abgeschirmten oder unabgeschirmten Datenkabeln mit abgeschirmten oder unabgeschirmten Klinkensteckern verbunden werden.

10BASE-T/100BASE-TX Ports

The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T has 24 10/100Mbps auto-negotiating ports. Ports 1–23 are MDIX ports. Each can be connected to a device with an MDI port (such as a workstation) using a normal ‘straight through’ TP (twisted pair) cable. Alternatively, you can connect to a device with MDIX ports using ‘cross-over’ TP cable.

Port 24 is ‘switch selectable’ MDI/MDIX using the MDI switch, as described in 2. Using this port, you can connect to any other device without the need for ‘cross-over’ cable.

Ports 1 to 24 are auto-negotiating: their speed and duplex mode (half duplex or full duplex) are automatically determined by the capabilities of the connected device. Each port can be connected to either a 10BASE-T or a 100BASE-TX device.

CAUTION: The Baseline 10/100 Switch supports full

duplex auto-negotiation. If the connected device does not ! support auto-negotiation, the Switch will operate in half duplex mode (even if the device is operating in full duplex

mode). In such a configuration, you may notice some degradation of network performance. 3Com recommends that you use devices that are capable of auto-negotiation (and that you ensure that auto-negotiation is enabled, if it is a configurable option).

1000BASE-T Port

Port 25 is a 1000BASE-T port capable of auto-negotiation with the connected port to operate at 1000BASE-T full duplex. It auto-senses an MDI/MDIX connection and can be used to connect

to either another 1000BASE-T switch port or to a 1000BASE-T server or workstation without additional configuration.

Connecting to a Network Device

To connect a device to the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T, use Category 5 unshielded or shielded (screened) 100 Ohm TP cable (or Category 3 cable for a 10Mbps connection). The maximum length of cable for each connection is 100m (328ft). Connect one end of the cable to an RJ-45 port on the Baseline 10/100 Switch, and the other end to the appropriate RJ-45 port on the connecting device.

Connecting to another Switch or Hub

If you connect two Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T units together, 3Com recommends that you use the 1000BASE-T ports on both units for the link. You must use Category 5 cable when connecting the units.

1000BASE-T connection: To connect a Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to another Switch using the 1000BASE-T port, use a normal ‘straight through’ cable and connect each end to the 1000BASE-T port on each unit.

100BASE-TX connection: To connect the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to a SuperStack 3 hub using a normal ‘straight through’ cable, connect any port on the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to the MDI/MDIX port on the hub, as shown below. Ensure that the MDI switch on the hub is in (MDI).

An alternative method of connecting the Baseline 10/100 Switch to a hub using a normal ‘straight through’ cable is to connect any MDIX port on the hub to the MDI/MDIX port on the Baseline 10/100 Switch, ensuring that its MDI Switch is set to in (MDI). You can use ‘cross-over’ TP cable to connect any MDIX port on the Baseline 10/100 Switch to any MDIX port on a hub.

2

2 MDI Switch

This switch affects port 24 only:

 

 

 

Out

Port 24 is an MDIX port.

 

 

 

 

It can be connected to a device with an MDI

MDIX

port (such as a workstation) using a normal

 

 

 

 

‘straight through’ TP cable.

 

 

 

In

Port 24 is an MDI port.

MDI

It can be connected to an MDIX port on a

device (such as a hub) using a normal

 

 

 

 

‘straight through’ TP cable.

3 Display Function Switch

This switch affects the Status LEDs described in 4 and 5:

Out This is the normal position of the switch. The Status LEDs show the Activity and Link Status of each port.

In When the switch is pressed in, the Status LEDs show the Duplex and Speed Status of each port. The switch returns to the out position when released. This switch does not affect port 25.

4 Activity/Duplex Status LEDs

The first (top) and third row of LEDs, which are colored yellow, show the activity or duplex status of the related ports:

TWhen the Display Function switch is out (its normal position), these LEDs show the activity of each port. The LED flashes when packets are received or transmitted on the port.

TWhen the Display Function switch is pressed in, these LEDs show the duplex status of each port:

On The port is operating in full duplex mode.

Off Ports 1 to 24: If the link is established, the port is operating in half duplex mode.

Port 25: No link is present.

5 Link/Speed Status LEDs

The second and fourth (bottom) row of Status LEDs, which are colored green, show the link or speed status of the related ports:

TWhen the Display Function switch is out (its normal position), these LEDs show the link status of each port:

On The link has been established and the segment attached to the port is functional.

Off The link has not been established. Either nothing is connected to the port, or there is a problem:

Check that the attached device is powered on.

Check that the cable is the correct type and is not faulty.

If the LED is off for port 24, check the setting of the MDI switch. Refer to 2. Try toggling the MDI switch.

If the port is connected to another unit’s MDI/MDIX port, check the other unit’s MDI switch position.

If these checks do not identify the cause of a problem, it may be that the unit or the device connected to the port is faulty. Contact your supplier for further advice.

TWhen the Display Function switch is pressed in, these LEDs show the speed status of each port:

On Ports 1 to 24: The port is operating at 100Mbps. Port 25: The port is operating at 1000 Mbps

Off Port 1 to 24: If the link is present, ports 1 to 24 are operating at 10Mbps.

Port 25: The link has not been established.

6 Power/Self Test LED

The Power/Self test LED lights green when the unit is powered on and ready for use.

Rear Panel Connections

7 Power Supply

The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T automatically adjusts to the supply voltage. Only use the power cord that is supplied with the unit.

8 Socket for Redundant Power System (RPS)

Only connect a 3Com SuperStack 3 Advanced RPS (3C16070, 3C16071, 3C16071A or 3C16071B) to this socket. An appropriate power module and cable is required. The connector on the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T is a Type 2 socket. For details, follow the installation instructions in the guides that accompany the Advanced RPS and the power module.

9 Self-adhesive Pads

The unit is supplied with four self-adhesive rubber pads.

You do not need to apply the pads if you intend to rack mount the unit.

If the unit is to be part of a free standing stack, apply the pads to each marked corner area on the underside of the unit. Place the unit on top of the lower unit, ensuring that the pads locate with the recesses of the lower unit.

INSTALLATION RECOMMENDATIONS

Positioning the Switch

When deciding where to position the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T ensure:

TIt is accessible and cables can be connected easily.

TCabling is away from sources of electrical noise. These include lift shafts, microwave ovens, and air conditioning units. Electromagnetic fields can interfere with the signals on copper cabling and introduce errors, therefore slowing down your network.

TWater or moisture cannot enter the case of the unit.

TAir flow around the unit and through the vents in the side of the case is not restricted (3Com recommend that you provide a minimum of 25mm (1in.) clearance).

TThe air is as free from dust as possible.

TTemperature operating limits are not likely to be exceeded. It is recommended that the unit is installed in a clean, air conditioned environment.

It is always good practice to wear an anti-static wrist strap when installing network equipment, connected to a ground point. If one is not available, try to keep in contact with a grounded rack and avoid touching the unit's ports and connectors, if possible. Static discharge can cause reliability problems in your equipment.

Rack Mounting or Free Standing

The unit can be mounted in a 19-inch equipment rack using the Mounting Kit. Refer to “Mounting Kit Instructions” on page 4, or it can be free standing. Do not place objects on top of the unit or stack.

CAUTION: If installing the Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T in a free standing stack of different size SuperStack 3 units, the smaller units must be installed above the larger ones. Do not have a free standing stack of more than six units.

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