User manual

SM User Manual January 2004
Software Release 4.1
3 SYSTEM OVERVIEW
The Canopy network uses the Canopy components that are defined in Table 1.
Table 1: Definitions of Canopy components
Component Definition
Access Point Module (AP)
One module that distributes network or Internet services in a 60°
sector to 200 subscribers or fewer.
Access Point cluster
(AP cluster)
Two to six APs that together distribute network or Internet services to
a community of 1,200 or fewer subscribers. Each AP covers a 60°
sector. This cluster covers as much as 360°.
Subscriber Module (SM)
A customer premises equipment (CPE) device that extends network
or Internet services by communication with an AP or an AP cluster.
Cluster Management
Module (CMM)
A module that provides power, GPS timing, and networking
connections for an AP cluster. If this CMM is connected to a
Backhaul Module (BH), then this CMM is the central point of
connectivity for the entire site.
Backhaul Module (BH)
A module that provides point-to-point connectivity as either a
standalone link or a link to an AP cluster through a selected AP.
3.1 MODULE-TO-MODULE COMMUNICATIONS
Each SM communicates with an AP in an assigned time slot that the AP controls. The AP
coordinates the needs of SMs for data in both the downlink and the uplink to provide seamless
communication across the entire network. The BH communicates with another BH, a collocated
connection to the network, and a collocated AP.
The AP uses a point-to-multipoint protocol to communicate with each registered SM. The BH timing
master uses a point-to-point protocol to communicate with a BH timing slave.
For more information about the AP, see Canopy Access Point Module (AP) User Manual. For more
information about the BH, see Canopy Backhaul Module (BH) User Manual.
3.2 TYPES OF SM APPLICATIONS
Subscriber modules are available in 2.4-GHz, 5.2-GHz, and 5.7-GHz frequency bands. Due to
regulatory agency restrictions, a 5.2-GHz SM cannot be used with a reflector in the U.S.A. or
Canada.
A 2.4-GHz or 5.7-GHz SM can be used with a Canopy Passive Reflector dish. This reflector
extends the maximum span of a link as defined in Table 2.
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