12
Cisco Aironet 2.4-GHz/5-GHz 8-dBi Directional Antenna (AIR-ANT2588P3M-N)
Communications, Services, and Additional Information
Note:
Cisco recommends grounding the antenna. See
Grounding the Antenna, page 12
.
Antenna Cable Information
The antenna is to be used with the Cisco 1552E access point. The port-to-port designations are as follows: port A of
the antenna must be connected to port 4 of the access point, port B of the antenna must be connected to port 6 of the
access point, and port C of the antenna must be connected to port 5 of the access point.
Note:
Coaxial cable loses efficiency as the frequency increases, resulting in signal loss. The cable should be kept as short
as possible, because cable length also determines the amount of signal loss (the longer the run, the greater the loss).
Cisco offers low-loss 5 ft. and 10 ft. coaxial cables, parts AIR-CAB005LL-N and AIR-CAB010LL-N, respectively, for
connection from the antenna to the access point. These cables have one straight male type-N connector and one right
angle male type-N connector. To use all of the ports on the AIR-ANT2588P3M-N three cables will be needed.
After the cable is attached to the antenna, make sure that the connections are sealed (if outdoors) to prevent moisture
and other weathering elements from affecting performance. Cisco recommends using a coax seal (such as CoaxSeal)
for outdoor connections. Silicone sealant or electrical tape are
not
recommended for sealing outdoor connections.
Grounding the Antenna
Follow these steps to ground the antenna in accordance with national electrical code instructions.
1.
Use No. 10 AWG copper or No. 8 or larger copper-clad steel or bronze wire as ground wires for both mast and
lead-in. Securely clamp the wire to the bottom of the mast.
2.
Secure the lead-in wire to an antenna discharge unit and the mast ground wire to the building with stand-off
insulators spaced from 4 ft (1.2 m) to 8 ft (2.4 m) apart.
3.
Mount the antenna discharge unit as close as possible to where the lead-in wire enters the building.
4.
Drill a hole in the building’s wall as close as possible to the equipment to which you will connect the lead-in cable.
Caution:
There may be wires in the wall. Ensure that your drilling location is clear of obstruction or other hazards.
5.
Pull the cable through the hole and form a drip loop close to where it enters the building.
6.
Thoroughly waterproof the lead-in area.
7.
Install a lightning arrestor.
8.
Connect the lead-in cable to the equipment.
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