Chapter 5: C4c CMTS Installation Requirements
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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The figure below shows the LEDs and power for Buses A and B. The system power indicator and fan status LED is in the
middle of this panel.
Figure 39:
LED and Power Bus Status
Power Protection Description
The C4c CMTS chassis power configuration consists of three levels of protection:
A and B power feeds controlled by circuit breaker in the PM
Internal chassis branch fuses located in the PM
Fuses located on the front modules (These fuses are not field replaceable).
The C4c CMTS must be installed only by trained service personnel who are familiar with the precautions required when
working in a –48V DC or 115V AC power delivery environment. Power requirements are listed in Power Requirements.
A and B Power Feeds
Power is supplied to the C4c CMTS via A and B feeds located at the rear of the unit. The power feeds are protected by two
30-amp breakers located on the rear of the chassis, shown in Power Requirements (DC PM) and Power Requirements (AC
PM). This is the first level of protection.
They also serve as the master disconnect switch for the unit. The breakers protect the cables within the CMTS which carry
high current and the power connectors located at the rear of the unit.