7705 SAR-8 Overview
7705 SAR-8 Installation Guide Page 45
Figure 5 identifies the slots used for the CSMs, adapter cards (MDA), and Fan module. In
redundant systems, the CSMs are installed in slots CSM A and CSM B, and the adapter
cards are installed in slots MDA 1 through MDA 6. In simplex systems, the CSM is installed
in slot CSM A, a filler plate is installed on slot CSM B, and the adapter cards are installed in
slots MDA 1 through MDA 6.
.
CSM
The 7705 SAR-8 supports two variants of the CSM: a –48 VDC variant and a +24 VDC
variant.
The Control and Switching Module (CSM) has three main functions:
• it provides the management and console interfaces to the 7705 SAR-8
• it provides system synchronization interfaces for external synchronization input and
output signals
• it controls the routing, switching, and services functions for the entire system
Each CSM is shipped with one compact flash memory device that stores system boot
software, OS software, and configuration files and logs. The compact flash device is field-
replaceable; see Compact Flash in Installing Components on page 96.
Figure 5: 7705 SAR-8 Slot Identification
CSM A
MDA 1
MDA 3
MDA 5
CSM B
MDA 2
FAN
Batt B
MDA 4
MDA 6
Batt A
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