Chapter 6: System Control Module (SCM)
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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The C4 CMTS is now operating with SCM 3s and its configuration file is backupMMDDYY.cfg. It is running on Release 8.x.x.x
software, which has been committed. If the image currently on the SCM cards is not the desired load, then upgrade to the
desired load using the normal upgrade procedure. Refer to the Release Notes for more information.
Compact Flash
CAUTION: Flash disks from Rev. B SCMs are not compatible with the flash drives of Rev. E and later SCMs, and vice versa.
The older SCMs use a disk with a 70-pin connector; newer SCMs use a disk with a 50-pin connector. Also, the two types of
disk do not have the same physical dimensions. If you attempt to insert the removable flash disk from one type into the
flash drive of the other, you can damage the module and render it unusable.
The flash disk drive of the SCM II EM (U) and SCM 3 changes to a new physical format. The following description covers the
4GB compact flash disk for the SCM II EM (U) and higher models only.
Physical Dimensions
The compact flash disk has a standard 50 pin connector consisting of two rows of female contacts as illustrated in the
following graphic.
Figure 50:
Pin-out of 4GB Flash Disk Connector