Note- Read an d understand the instructions in this chapter before starting the maintenance
work.Also see the contents of "Chapter 1 BeforeStarting MaintenanceW ork."
Table27-1 Typesof maintenance for the XSCF DUAL control cables
Configuration Active/hot Active/cold Inactive/hot Inactive/cold Systemstopped
Building block configuration
(withoutcrossb ar box)
Supported(*) Supported Supported Supported Supported
Building block configuration
(withcrossbar b ox)
Supported(*) Supported Supported Supported Supported
*:The XSCF must be configured as a slave before maintenance is started.If it is operating as the master XSCF, switch it to a standby
XSCF.
Table27-2 Maintenanceflow
Task Replacement
1 Preparation 27.3
2 Removingthe XSCF DUAL control cables 27.4
3 Installingthe XSCF DUAL control cables 27.5
4 Restoringthe system 27.6
27.2 Before Maintaining an XSCF DUAL
Control Cable
Thissectio n describes the types and the flow of the maintenance of the XSCF DUAL
controlcables.

27.2.1 T ypes of maintenance

Table27-1 lists the types of maintenance for the XSCF DUAL control cables. For the
definitionof maintenance, see "4.3 UnderstandingTypes of Maintenance."

27.2.2 Maintenance flow

Table27-2 lists the sequence of the mai ntenance procedure for the XSCF DUAL
controlcables.
Chapter27 Maintainingthe XSCF DUAL Control Cables 415