User guide

March 2005 Understanding Canopy Networks
Through Software Release 6.1
Page 38 of 425 Issue 1
Canopy System User Guide
5.1.3 Subscriber Module
The Subscriber Module (SM) is a customer premises
equipment (CPE) device that extends network or
Internet services by communication with an AP. The
SM is configurable through a web interface.
An SM mounted directly to a structure is pictured in
Figure 2.
Figure 2: Structure-mounted SM
5.1.4 900-MHz AP and SM
Canopy 900 MHz AP and SM modules operate at 3.3
Mbps (compared to 10 Mbps for other Canopy frequency
bands). With Downlink Data set to 75% on the AP
Configuration page, the AP supports high throughput to
an SM.
These 900-MHz modules run the same software and
provide the same parameters, network features, and
connections as all other Canopy APs and SMs. The
physics of longer-wavelength 900 MHz, the power
allowed by regulatory authorities, and the low Canopy
Carrier-to-Interference (C/I) ratio combine to support:
◦ LOS range of 40 miles (over
64 km)
◦ increased NLOS range, depending on RF
considerations such as foliage, topography,
and obstructions.
When collocated with a Canopy SM of another frequency
band range, the 900-MHz AP may serve, without a tower
or BH, as a remote AP. The SM provides the Spectrum
Analyzer feature.
900-MHz modules operate on only the unique Canopy
System Release 4.2.2 or later releases, but can be used
in networks that also consist of modules in other
frequency bands operating on earlier Canopy system
releases.
Figure 3: 900-MHz radio
with flat panel antenna
Figure 4: Other flat panel
antenna