Nortel Networks 1000E User Manual

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 System components
553-3041-210 Standard 4.00 September 2007
The CS 1000E Call Server has a second processor running in “warm standby” 
mode. This processor (Core Call Server 1) resides in a duplicate chassis that 
can be located anywhere. 
Figure 2
CS 1000E Core Call Server (front view)
Backup and restore enhancements
The backup rules group of commands was introduced in CS 1000 Release 4.0 
with the single rule type Secondary Call Server (SCS). Backup and restore