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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To Replace the Air Filter
CAUTION: Due to the heat generated by the C4c CMTS system, it is critical that preparations are made in advance to
change the fan filter. The fan filter replacement must be completed within a 60-second window or damage may occur to
the chassis and/or the boards.
1.
Be sure you are wearing an ESD strap when handling any modules.
2.
Open the right side panel to access the Fan Tray Module.
3.
Flip open the ejector levers away from each other to open and unlock the Fan Tray Module from the slot. Carefully
slide the module out of the seating rails.
4.
Quickly remove the air filter by sliding it up and out of the Fan Tray Module. Replace it with a new filter. Ensure that
the diamond-shaped mesh is facing toward the modules and away from the fans.
5.
Carefully align the Fan Tray Module on the rails and with the ejector levers open, slide the module firmly all the way
into the slot. Apply equal pressure to the top and bottom of the Fan Tray Module.
6.
Flip the ejector levers toward each other to close and lock the Fan Tray Module in place. As the teeth of the levers
engage the seating rails, the Fan Tray Module clicks into place if seated correctly.
CAUTION: The air filter can be incorrectly positioned and cause interference when inserting or removing the Fan Tray
Module.
Note: The diamond-shaped mesh side of the air filter should face toward the modules, away from the fans.
Replacement filters may be ordered from ARRIS in kits of four — normally a year’s supply for one chassis. For ordering
information contact your ARRIS sales representative.
Power Module and Cabling
The C4c CMTS can operate on a single -48V DC or a 115V AC power source, but requires two -48V power feeds, A and B, for
redundancy. In the event that one feed fails or is removed from service for maintenance, the other feed continues to
supply power to the C4c CMTS with no interruption in service.