3Com AP3750 quick start Connecting External Antennas, Mounting the Access Point

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3 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.

Antenna Model

Type

Restrictions

3CWE591

3Com 6/8 dBi Dual-Band Omnidirectional Antenna

 

 

3CWE597

3Com 6/8 dBi Dual-Band Hallway Antenna

 

 

3CWE598

3Com 8/10 dBi Dual-Band Panel Antenna

Not supported for IEEE 802.11 a-band channels 36-48 for the United States, Canada, Mexico, Peurto Rico, Panama, Guatemala, Dominican Republic and Colombia

Cable Model

Type

Length

Gain

Connectorsa

3CWE580

3Com Ultra-Low-Loss

1.8 m

2.4

GHz: -0.6 dBl

SMA (male) to N-type

 

6-foot Antenna Cable

(6 ft)

5.0

GHz: -1.2 dBl

(male)

 

 

 

 

 

 

3CWE581

3Com Ultra-Low-Loss

6.1 m

2.4

GHz: -2.0 dBl

SMA (male) to N-type

 

20-foot Antenna Cable

(20 ft)

5.0

GHz: -4.0 dBl

(male)

 

 

 

 

 

 

3CWE582

3Com Ultra-Low-Loss

15.2 m

2.4

GHz: -5.0 dBl

SMA (male) to N-type

 

50-foot Antenna Cable

(50 ft)

5.0

GHz: -10.0 dBl

(male)

 

 

 

 

 

 

a.Each 3Com cable includes a separate 50 Ohm SMA terminator.

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.

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

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

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.

4 Mounting the Access Point

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

Suspended ceiling — flush ceiling tiles

Suspended ceiling — drop ceiling tiles

Junction box

Solid wall or ceiling

Tabletop

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Contents About This Guide AP3750 Managed Access PointDiameter 16.76 cm 6.6 inches Height 69 cm Inches 3Com AP3750 Managed Access Point FeaturesRJ-45 Cable Ports Observing Safety PrecautionsPreparing for Installation Unpacking the Access PointPower CablingMounting the Access Point Connecting External AntennasSuspended Ceiling Flush Ceiling Tiles Cable RequirementAttach the mounting bracket to the T-bar clamp Attach the access point to the mounting bracketBar Slide together Bar clamp halves Suspended Ceiling Installation Drop Ceiling Tiles840-9502-0002 Point Bracket Junction Box InstallationAttach the bracket to the junction box Point Template template Bracket bracket Solid Wall or Ceiling InstallationCable Universal mounting bracket 840-9502-0016 Lock Point Bracket bracket Tabletop InstallationConfiguring the Access Point Connecting the Access Point to a SwitchRadio 2 LED Radio 1 LED Health LED Checking the LED IndicatorsUSA-FEDERAL Communications Commission FCC EMC Compliance Regulatory InformationIndustry Canada IC RF Compliance Manufacturers FCC Declaration of ConformityEurope EU Declaration of Conformity Outras disposições da Directiva 1999/5/CE Allowed Frequency Bands Allowed Channel Numbers Countries Brazil RF Compliance