3Com AP2750 Bedienungsanleitung

Quick Start Guide

AP2750 Managed Access Point

3CRWX275075A

The 3Com AP2750 Managed Access Point provides IEEE 802.11a or 802.11b/g wireless access to the

network. The access point is designed for use with a 3Com Wireless LAN Switch, and requires

hardware installation only. All configuration for the access point takes place on the 3Com Wireless

LAN Switch.

You must have a wireless switch device to operate the access point. Two WLAN switch devices can be

connected to the access point:

• 3Com WX4400

• 3Com WX1200

Power can be supplied via Power Over Ethernet (PoE) or by an external power supply. Four 3Com PoE

devices supply power to the access point:

• 3Com PoE Injector

• 3Com 4400PWR PoE Switch

• 3Com Multi-port PoE power supply

• 3Com WX1200

About This Guide

This Quick Start Guide describes the basic installation of the access point. It covers the following topics:

•3Com AP2750 Managed Access Point Features

•Observing Safety Precautions

•Step1:Unpacking the Access Point

•Step2:Preparing for Installation

•Step3:Attaching the Antennas

•Step4:Mounting the Access Point

•Step5:Connecting the Access Point to a Switch

•Step6:Checking the LED Indicators

•Troubleshooting

10015413-AA_AP2750_QSG.fm Page 1 Wednesday, July 26, 2006 4:50 PM

3Com AP2750 Managed Access Point Features

Feature Description

Power Port The access point can be powered either via Power Over Ethernet (PoE), or by an

external power supply (not included) that is plugged into the Power Port.

Serial Port The serial port is not supported.

Ethernet Port The Ethernet port provides a 10/100BASE-TX Ethernet connection to a 3Com Wireless

LAN switch. The connection can be direct to a 3Com switch or indirect through an

intermediate Layer 2 or Layer 3 network.

Use a standard Category 5 cable with straight-through signaling and standard RJ-45

connectors to connect the access point to the switch on the network.

LEDs The LEDs indicate power and activity. See “Checking the LED Indicators” on page 8

for details.

Antenna Connectors Two SMA-female antenna connectors allow you to connect antennas that operate in

2.4 GHz and 5.3 GHz bands.

Reset Button The reset button is accessible from the back of the access point as well as through the

mounting bracket. Push the reset button to restore the access point to its factory

default settings.

Mounting Bracket The mounting bracket comes attached to the access point. This mounting bracket

allows the access point to be mounted to a wall or ceiling.

Power Port

Serial Port

Ethernet Port

Mounting

Bracket

LEDs Antenna

Connectors

Reset

Button

10015413-AA_AP2750_QSG.fm Page 2 Wednesday, July 26, 2006 4:50 PM

Observing Safety Precautions

This equipment must be installed in compliance with local and national building codes, regulatory

restrictions, and FCC rules. For the safety of people and equipment, only professional network personnel

should install the access point.

1 Unpacking the Access Point

Make sure that you have the following items, which are included with the access point:

• Two external 2.4 GHz and 5.3 GHz dual-band antennas

• Mounting bracket (attached to the access point)

• Wall-mounting hardware:

•Locking bar (used for securing a wall- or ceiling-mounted installation)

•Two sheet metal screws

•Two thread screws

•Two wall anchors

• Four adhesive rubber feet (used for a flat-surface installation).

2 Preparing for Installation

It is advisable to connect the power (if using an external power supply) and check the Ethernet cables

and LEDs before installing the access point in a hard-to-reach location. Additionally, observe the

following items before mounting or connecting the access point:

WARNING: To comply with FCC radio frequency (RF) exposure limits, a minimum body-to-

antenna distance of 20 cm (8 in.) must be maintained when the access point is operational.

WARNING: To avoid possible injury or damage to equipment, you must use power supply equipment

that is safety certified according to UL, CSA, IEC, or other applicable national or international safety

requirements for the country of use. All references to power supply in this document refer to equipment

meeting these requirements.

Installation Item Description

Switch port 3Com recommends that you install and configure the 3Com Wireless LAN switch

before installing the access point. Set the port type on the switch to an AP2750

access point.

Cabling Make sure that standard Category 5 cable with straight-through signaling is

installed at the site before you install the access point.

Make sure that the cable is highly flexible and that there is no extra covering on the

RJ-45 connector that could prevent the cable from being routed through the

mounting bracket.

Power Requirements Power can be supplied via an 802.3af Power Over Ethernet (PoE)-compliant device

or by an external power supply with a minimum 5v @ 2.0 amp.

If using an external power supply, make sure the power outlet is accessible. The

power supply plug is the only means of disconnecting the access point from power.

MAC Address Record the access point MAC address in a safe place before the access point is

installed in a hard-to-reach location.

The MAC address is printed on the back of the access point. Additional MAC

address labels are shipped with the access point.

10015413-AA_AP2750_QSG.fm Page 3 Wednesday, July 26, 2006 4:50 PM

3 Attaching the Antennas

Carefully unpack the standard detachable antennas. Screw the antennas on to the antenna connectors

on the access point and hand-tighten them. After network startup, you may need to adjust the antennas

to fine-tune coverage in your area.

For best results, adjust the antennas so that they are perpendicular with the floor and ceiling.

Connecting External Antennas

The access point has connectors for attaching optional external antennas and antenna cables. The tables

below list the external antenna and cable models that are certified for use with the access point.

The 3Com antennas are dual-band, which means that they operate in both 2.4GHz and 5GHz spectra.

You can use these antennas with either the 802.11b/g radio or the 802.11a radio.

Each antenna requires the purchase of a separate antenna cable.

For installation instructions, see the documentation that is supplied with the antenna.

CAUTION: Do not handle the antenna tips, especially after they are connected to the access

point. This could lead to electrostatic discharge (ESD), which could damage the equipment.

Antenna Model Typ e

3CWE591 3Com 6/8 dBi Dual-Band Omnidirectional Antenna

3CWE592 3Com 3/4 dBi Dual Band Ceiling Antenna

3CWE597 3Com 6/8 dBi Dual-Band Hallway Antenna

Cable Model Typ e

3CWE580 3Com Ultra Low Loss 6-Foot Antenna Cable

3CWE581 3Com Ultra Low Loss 20-Foot Antenna Cable

3CWE582 3Com Ultra Low Loss 50-Foot Antenna Cable

NOTE: Antenna cables introduce loss of the RF signal. Always use the shortest cable that your

application allows.

NOTE: During the installation, connect the antenna to the access point before connecting the

Category 5 Ethernet cable. This ensures that the access point is not powered on when the

access point is connected to the network.

10015413-AA_AP2750_QSG.fm Page 4 Wednesday, July 26, 2006 4:50 PM

4 Mounting the Access Point

The access point can be mounted on the following types of surfaces:

• Wall, ceiling, or electrical box (NEMA enclosure)

•Tabletop

Wall, Ceiling, or Electrical Box Mounting

To mount the access point to a wall, ceiling, or electrical box:

1Remove the access point from the mounting bracket.

2Screw the mounting bracket to a wall, ceiling, or electrical box (NEMA enclosure):

•If mounting to a solid surface wall or ceiling, use the two sheet metal screws.

•If mounting to drywall, use the two sheet metal screws and two wall anchors.

•If mounting to an electrical box (NEMA enclosure), use the two threaded screws.

3Route the power cable (if using an external power supply) and Ethernet cable

through the large opening on the back of the mounting bracket.

CAUTION: The access point is intended for indoor use only. Do not install the access point

outdoors unless you install it in a properly installed outdoor access point enclosure.

CAUTION: For easy installation and removal of the access point from the mounting

bracket, make sure that there is sufficient flexibility with the cable and that there is

adequate service loop (that is, enough cable routed through the mounting bracket

to easily connect the cable to the access point.) If not enough cable is routed

through the back of the mounting bracket, or if the cable is inflexible, it can be

difficult to install or remove the access point from the mounting bracket.

10015413-AA_AP2750_QSG.fm Page 5 Wednesday, July 26, 2006 4:50 PM

The figures below show the mounting bracket being mounted to a wall, and then a cable

being routed through the large opening on the back of the mounting bracket.

4Connect the Ethernet cable (and power cable, if applicable) to the port(s) on the

front of the access point.

5Snap the access point onto the mounting bracket.

To install the locking bar, push the locking bar through the opening in the side of the

mounting bracket until the hole on the locking bar is exposed. Insert a lock (not provided)

through the hole on the locking bar, and then close the lock to secure it in place.

Installing the mounting bracket Routing a cable

Inserting the locking bar Securing the bar with a lock

.11g

.100

.10

.11a

.11g

.100

.10

.11a

10015413-AA_AP2750_QSG.fm Page 6 Wednesday, July 26, 2006 4:50 PM

Tabletop Mounting

To install the access point on a flat surface such as a table or desktop:

1Remove the backing from the four rubber feet and attach them on the bottom of

the mounting bracket that is attached to the access point.

2Place the access point on the table.

3Connect the Ethernet cable (and power cable, if applicable) to the port(s) on the

front of the access point.

5 Connecting the Access Point to a Switch

3Com recommends that you install and configure the 3Com Wireless LAN switch before installing the

access point. If the switch is already installed and configured for the access point, you can immediately

verify the cable connection when you plug the cable into the access point.

You can connect the access point directly to a 3Com Wireless LAN Switch port or indirectly to

3Com Wireless LAN switches through an intermediate Layer 2 or Layer 3 network. In either case, use

Category 5 cable with straight-through signaling for each access point connection.

• To connect the access point directly to a 3Com Wireless LAN Switch, configure the switch port

as an AP2750 access point and then insert the cable into the switch and verify the link.

• To connect the access point indirectly to a 3Com Wireless LAN Switch through the network,

configure a Distributed Access Point connection on the switch.

CAUTION: Do not place the access point on any type of metal surface. Select a location that

is clear of obstructions and provides good reception.

WARNING: Do not connect or disconnect cables or otherwise work with the access point

during periods of lightning activity.

Note: For instructions on configuring the access point, see the Mobility System

Configuration Guide or the 3Com Wireless LAN Switch Reference Manual.

10015413-AA_AP2750_QSG.fm Page 7 Wednesday, July 26, 2006 4:50 PM

trademarks of 3Com Corporation. All other company and product names may be trademarks of the

respective companies with which they are associated.

Part Number 10015413 Rev. AA

Published July 2006

6 Checking the LED Indicators

When the access point is connected to power, LEDs indicate activity as follows (solid LED indicates

connection; blinking LED indicates activity):

Troubleshooting

Refer to the Mobility System Configuration Guide or to the 3Com Wireless LAN Switch Reference

Manual to obtain the access point status.

LED Color Indicates

Power Green

Off

The access point is powered up

and operating normally.

The access point is not receiving

power or there is a fault with the

power supply.

11a Green

Off

The access point has WLAN

frame transmission over the

802.11a 5.3 GHz radio band.

No link is present.

11b/g Green

Off

The access point has WLAN

frame transmission over the

802.11b/g 2.4 GHz radio band.

No link is present.

100 Green

Off

The access point has a 100 Mbps

Fast Ethernet connection.

No link is present.

10 Green

Off

The access point has a 10 Mbps

Ethernet connection.

No link is present.

11b/g

11a

POWER

100

10015413-AA_AP2750_QSG.fm Page 8 Wednesday, July 26, 2006 4:50 PM

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