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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Use the following command to redirect the console port to the SCM that you plugged into:
configure line console 0 1 connect local
When using the local method your authentication will be local only on the standby SCM.
SCM II EM (U)
The System Control Module (SCM) has been in production since 2002. The SCM II EM (U) was implemented in Release
7.3.2.2 to extend its production life due to the replacement of some end-of-life (EOL) components. Since some of these
components are not software compatible, new software drivers were required to use the SCM II EM (U).
Due to hardware enhancements, the SCM II EM (U) is not backwards compatible with previous software releases. Because
of this incompatibility, the SCM II EM (U) will have a new product code to differentiate it from the existing SCM. Refer to
Types of System Control Modules (SCMs) for the comprehensive list of SCMs.
The SCM II EM (U) will include the 4 GB Enhanced Memory compact flash disk and replaces existing SCM hardware. With
updated software, any combination of existing SCM and SCM II EM (U) modules may be used in a duplex C4 CMTS chassis.
SCM 3
Beginning in Release 8.1, the SCM 3 processor complex including its RAM memory has been replaced in order to increase
performance. The SCM 3 maintains the same standards compliance as the SCM and SCM II.
Due to hardware enhancements, the SCM 3 is not backwards compatible with previous software releases. Because of this
incompatibility, the SCM 3 has a new product code to differentiate it from the existing SCM. Refer to Types of System
Control Modules (SCMs) for the comprehensive list of SCMs.
The SCM 3 includes the 4 GB Enhanced Memory compact flash disk and replaces existing SCM hardware. The SCM 3 can be
operated only in software Release 8.1 or later. Also, the SCM 3 is not compatible with SCMs or SCM IIs in duplex systems.