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Cisco ONS 15600 SDH Reference Manual, Release 9.0
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Chapter 11 Alarm Monitoring and Management
11.6.3 Virtual Wires for External Alarms in Mixed Networks
shows an ONS 15600 SDH Virtual Wires window with a DCC connection to an
ONS 15454 SDH node. The Virtual Wires window shows 10 virtual wire columns, but 16 are available.
The first 12 are available for other ONS 15600 SDHs. Only the last four are available for the ONS 15454
SDH, because it can only support four virtual wires.
Figure 11-7
Virtual Wires Seen from an ONS 15600 SDH