Cisco Aironet Series 1700/2700/3700 Access Point Deployment Guide
Cisco Aironet Series 3700 Access Point
Figure 47
Radiation Patterns for the AP 1600i @ 2.4 GHz
Figure 48
Radiation Patterns for the AP 1600i @ 5 GHz
Understanding External Antenna Deployments
All Cisco antenna connectors are labeled; “A,” “B,” “C,” and so on. “A” has a higher priority than “B” or “C/D” so, if the AP
supports say 3 or 4 antennas and you only have 2 antennas, you can use them on ports “A” and “B” for a short term until you
install the additional antennas.
While it is not recommended that you use less antennas–the product (in a pinch) supports 802.11a/b/g clients or single spatial
stream N clients using only one or two antennas. However, there is a significant performance hit and you will lose ClientLink
functionality. Should you do this, you might also have to configure the AP in the software so as not to use the other antennas.