Chapter 5: C4c CMTS Installation Requirements
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 144
Midplane
Between the front and back slots is the midplane of the chassis. The midplane connects the front modules to the rear
modules. The midplane is a necessary point of communication for all modules inserted in the C4c CMTS. The midplane is
used as follows:
By the power modules to provide power to the rest of the system
By the SCM and RCM to exchange control information and packets
By the CAMs (client modules) to pass packets to the RCM
By the RCM to pass packets to the CAMs and SCM.
Filler Panels
The C4c CMTS has three types of filler panels:
Front filler panels — used for any unequipped front module slot.
Rear filler panels — used for any unequipped rear PIC slot.
Power Module filler panel - used for an unequipped power module.
All unused module slots, front and rear, must be equipped with filler panels. Filler panels are required for proper EMC
emission levels and sufficient airflow to properly cool the C4c CMTS system. Failure to cover empty slots reduces the air
flow through the chassis and could result in overheating.
Storing Modules
Retain the packaging in which each module was shipped and follow these guidelines for storing modules to avoid damage:
Store each module in a separate antistatic bag. Ideally, store the item in its antistatic bag within the protective
packaging or padded box in which the item was shipped.
Installing Modules in the C4c CMTS
CAUTION: Before removing or replacing any C4c CMTS modules, obtain and attach an antistatic grounding wrist or ankle
strap to protect against damage to components resulting from static electricity.
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