Revised: January 25, 2017,
Q & A
Q: Cisco has a newer Power Injector (AIR-PWR-INJ5). Can I use this with the AP 1850?
A: The newer AIR-PWR-INJ5 is a low cost injector for use with the AP 1600 and AP 2600 series products. It is an 802.3af
(15.4 W injector) and will power the AP 1850 at reduced functionality. It is recommended to use AIR-PWR-INJ4, which is a
30 W injector, as the AP 1850 draws roughly 20 W for full functionality.
Q: Can industrial wireless motion or smoke detectors cause WLAN interference?
A: Yes, some products such as United Technologies DD475 and Optex MX-50 operate in the 2.4 GHz band as do other wireless
chimes, cameras, and other industrial equipment from other manufacturers.
Q: What if I am in a country where the regulatory agency may not approve the AP to be used outdoors because of UNII-1
band restrictions or if I wish to use higher gain antennas?
A: Consider deploying the Cisco Mesh products (1570, 1550, and 1530 series) or look for access points ending in “P” for
professional install, such as the 3602P and 3702P series.
Q: Any other thoughts when installing wireless APs?
A: When installing wireless APs, consider the following:
•
Place the APs as reasonably close to the actual users as possible.
•
Make sure that you have coverage (to a known requirement) and compensate for nulls or dead spots regardless of what
product you choose to deploy. This is called a site survey.
•
Installations should be done based on lessons learned from the site survey. The better the survey the less likely any
connectivity problems will occur.
•
Cisco has an advanced services team that can perform WLAN surveys or help with the wireless design if a partner is not
available or able to do the same.
•
When possible, use Cisco brand antennas listed in this document (with the orange band).
•
Do not mount antennas against metal objects. Similar to a light bulb, antennas work best when there are no obstructions
in the path.
•
AP 1600, 1700, 1850, 2600, 2700, 3600, and 3700 are not weatherproof and have an IP rating of 40.
Q: Why am I seeing 6.x.x.x address in CDP Neighbour table on Cisco 1832/1852 AP?
A: The 1830 and 1850 access points have a default IP address, in the form 6.x.x.x, which they revert to if they do not receive
an IP address through DHCP. You can see this IP address when you use the command show cdp neighbor from the connected
switch. This IP address will exist until any DHCP issues in the network are resolved and the APs are assigned an IP address
via DHCP.
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