8018653 1.1 Introduction • 1-5
1.3
Base station controller
The BSC (shown in figure 1-4) is responsible for controlling one or more
base transceiver stations (via T1 trunk circuits) and providing connec-
tions between them and the MSC via E1 trunk circuits. The BSC
performs call processing and hand-off procedures together with audio
compression and decompression.
Subsidiary of
Hughes
Aircraft Company
HUGHES
NETWORK SYSTEMS
Figure 1-4. BSC equipment rack
1.4
Base transceiver station
The BTS includes antennas, transmitters, and receivers that communicate
with the mobile stations, and digital multiplex equipment that deliver
audio traffic (via T1 links) to the BSC for further processing.
The BTS includes the following equipment:
•Antennas: omnidirectional and sectorized
•Radio frequency modular cabinets (RFMCs)
• Channel unit modular cabinets (CUMCs)
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