User's Manual Part 1

3: Detailed Description
APCD-LM043-8.0 (DRAFT C) 19
Figure 10 CCU Functional Blocks
The CCU forwards packets received from the CCU radio port
• to internal CCU processes,
• through the CCU Ethernet port to any router on the Ethernet network, such as the
Network Access Point, or
• back out the radio port to other EUMs (EUM-to-EUM packets).
The CCU forwards packets that are received from the Network Access Point through the
Ethernet port
• to internal CCU processes, or
• through the radio port to the destination EUM.
The CCU can be installed in a standalone configuration, or in a CCU shelf, as shown in Figure
11, with other operating CCUs. The CCU is powered by an AC/DC power supply, which can
also stand alone or be installed in the CCU shelf. The CCU operates independently of other
CCUs and can be swapped out without interrupting the operation of other CCUs.
Figure 11 CCU Shelf
Up to four operating CCUs can be installed at the same CAP, each with its own cavity filter,
lightning protector, transmission line, and antenna.
The CCU comes with a setup antenna, which can be used during CCU configuration and test,
prior to deployment.
Baseband
Controller
Radio
Baseband
Processor
Power
Amplifier/
Low-noise
Amplifier
Up/Down
Converter
Media
Access
Controller
Ethernet Port
10 BaseT
Console Port
DB9, RS232
CCU3000
Antenna
7.5 VDC
Radio
Power
Baseband