Determine Range & Clearance
Determine the Outdoor Range
3-8
Avaya Outdoor Antenna Installation Guide
This is due to local radio regulations and legislation that do not allow the
use of the 6 m. (20 ft.)/10 mm (0.4 in.) cables in ETSI countries, France
or Japan. See the example on Point-to-MultiPoint Links (page 3-15) for
more details.
!
CAUTION:
The 6m (20 ft.) cables with a diameter of 5mm (0.2 in.) can be used with
all antenna types. The Cable Loss of these cables equals the value of
the 15m.(50ft.) cables. Use of the 6m (20 ft.) cables with a diameter of
10mm (0.4 in.) is subject to local radio regulations. Consult Appendix
G “Introduction” for information whether you are allowed to use the 6m/
10mm cable in your country in combination with the antenna of your
choice.
Determine the Clearance Factor
For optimal performance of your outdoor antenna link, it is important that the
signal path between the two Avaya Wireless Outdoor Routers provides sufficient
clearance.
NOTE:
A wireless outdoor antenna link that lacks sufficient clearance will suffer
from poor performance, which is typically perceived as slow network
response times.
Although your Avaya Wireless Outdoor Router equipment will
automatically retransmit every data frame that got lost due to an out-of-
range situation or frame collision, the larger the number of
retransmissions attempts, the lower the throughput efficiency of your
wireless link.
This section will explain how to determine the clearance that applies in your
environment, and (if applicable) the effect of insufficient clearance on the range
of your outdoor antenna link.
In Chapter 2 “Preparing for Installation” we described the shape of the radio
beam being “bulged” in the middle, as pictured in Figure 3-1 on page 3-9.