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

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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