User guide

Understanding Canopy Networks March 2005
Through Software Release 6.1
Issue 1 Page 47 of 425
Canopy System User Guide
Module Housing
The HSG-01 Canopy Plastic Housing is available for
replacement of a damaged housing on a module that is
otherwise functional. The HSG-01 is pictured in
Figure 18.
The HSG-01 and all module housings of this design
provide clearances for cable ties on the Ethernet and sync
cables.
RECOMMENDATION:
Use 0.14” (40-lb tensile strength) cable
ties to secure the Ethernet and sync
cables to the cable guides on the
module housing.
For the Ethernet cable tie, the Ethernet cable groove is
molded lower at the top edge. For the sync cable tie,
removal of a breakaway plug provides clearance for the
sync cable, and removal of two breakaway side plates
provides clearance for the sync cable tie.
Figure 18: HSG-01 Housing
5.2 FREQUENCY BAND RANGES
In the 2.4-, 5.2-, 5.4-, and 5.7-GHz frequency band ranges, Canopy APs, SMs, and BHs
are available. Additionally, in the 900-MHz frequency band range, Canopy APs and SMs
are available. To avoid self-interference, a Canopy network typically uses two or more of
these ranges. For example, where properly arranged, all AP clusters and their respective
SMs can use the 2.4-GHz range where the BH links use the 5.7-GHz range. In this
scenario, subscriber links can span as far as 5 miles (8 km) with no reflector dishes, and
the BH links can span as far as 35 miles (56 km) with reflector dishes on both ends.
Within this example network, wherever the 2.4-GHz is susceptible to interference from
other sources, AP clusters and their linked SMs may use the 5.2-GHz range to span as
far as 2 miles (3.2 km) with no reflector dishes. The network in this example takes
advantage of frequency band range-specific characteristics of Canopy modules as
follows:
◦ The 900-MHz modules cover a larger area, albeit with lower throughput, than
modules of the other frequency bands. The 900-MHz modules can be used to
− penetrate foliage
− establish links that span greater distances
− add subscribers
− add overall throughput where modules of other frequency bands cannot be
used (such as where interference would result or space on a tower is
limited).