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3 Using Cisco Transport Controller 78-11719-02 July 2001
Cisco ONS 15327 User Documentation3-40
Figure 3-22 Setting timing parameters
Step 4
Click Apply.
3.12 Setting Up External User-Provisionable Alarms
You can use CTC to provision up to six external input alarms and two external output controls for
the ONS 15327. The XTC card houses the control logic for external alarm inputs and outputs.
3.12.1 Using Virtual Wires
Provisioning the external alarms provides a “virtual wires” option that you can use to route external
alarms and controls from different nodes to one or more alarm collection centers. For example, in
Figure 3-23, smoke detectors provisioned as external alarms at Nodes 1, 2, 3, and 4 are assigned to
Virtual Wire #1, and Virtual Wire #1 is provisioned as the trigger (external output control) for an
external bell at Node 1.