3Com AP3750 quick start Observing Safety Precautions, RJ-45 Cable Ports

RJ-45 Cable Ports

The access point has two RJ-45 ports. Each port provides a 10/100BASE-TX Ethernet connection to a WX switch. The connection can be direct to an WX switch or indirect through an intermediate Layer 2 or Layer 3 network.

The access point receives power and data through the RJ-45 ports. Use a Category 5 (Cat 5) cable with straight-through signaling and standard RJ-45 connectors to connect an access point to a WX switch or other device in the network. The access point supports 802.3af, and also can receive PoE from 3Com switches and 3Com-approved power injectors.

The two RJ-45 ports support dual-homed configurations for redundancy. The access point uses only one link for booting, configuration, and data transfer. If the link becomes unavailable, the access point can reboot using the other link.

The ports are identical except for logical numbering (1 or 2). You can use either port to connect the access point to a WX switch. However, the access point always attempts to boot on port 1 first. Only if the boot attempt on port 1 fails does the access point attempt to boot on port 2. If one port becomes unavailable, the other port can provide full power to the access point.

Note: The access point does not support daisy-chain configurations. Do not connect the access point to another AP3750 access point.

External Antenna Connectors

The access point has connectors for attaching optional external antennas. See “Connecting External Antennas” on page 5 for more information.

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

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WARNING: To comply with FCC radio frequency (RF) exposure limits, a minimum body-to- antenna distance of 20 cm (8 inches) 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.

WARNING: Do not operate the access point near unshielded blasting caps or in an otherwise explosive environment unless the device has been modified for such use by qualified personnel.

WARNING: Do not touch or move the access point when the antennas are transmitting or receiving.

WARNING: Do not hold any radio device so that the antenna is very close to or touching the face, eyes, or other exposed body part while the device’s radio antenna is transmitting.

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