External Alarms And Controls; Orderwire - Cisco ONS 15454 DWDM Installation And Operation Manual

Chapter 14 Card Reference

14.2.2.1 External Alarms and Controls

The AIC card provides provisionable input/output alarm contact closures for up to four external alarms
and four external controls. The physical connections are made using the backplane wire-wrap pins. The
alarms are defined using CTC and Transaction Language One (TL1). For instructions, see the
Install Alarm Wires on the Backplane (ANSI Only)" task on page
Each alarm contact has a corresponding LED on the front panel of the AIC that indicates the status of
the alarm. External alarms (input contacts) are typically used for external sensors such as open doors,
temperature sensors, flood sensors, and other environmental conditions. External controls (output
contacts) are typically used to drive visual or audible devices such as bells and lights, but they can
control other devices such as generators, heaters, and fans.
You can program each of the four input alarm contacts separately. Choices include:
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The output contacts can be provisioned to close on a trigger or to close manually. The trigger can be a
local alarm severity threshold, a remote alarm severity, or a virtual wire:
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You can also program the output alarm contacts (external controls) separately. In addition to
provisionable triggers, you can manually force each external output contact to open or close. Manual
operation takes precedence over any provisioned triggers that might be present.

14.2.2.2 Orderwire

Orderwire allows a craftsperson to plug a phoneset into an ONS 15454 and communicate with
craftspeople working at other ONS 15454s or other facility equipment. The orderwire is a pulse code
modulation (PCM) encoded voice channel that uses E1 or E2 bytes in section/line overhead.
The AIC allows simultaneous use of both local (section overhead signal) and express (line overhead
channel) orderwire channels on a SONET ring or particular optics facility. Local orderwire also allows
communication at regeneration sites when the regenerator is not a Cisco device.
You can provision orderwire functions with CTC similar to the current provisioning model for
DCC/GCC channels. In CTC, you provision the orderwire communications network during ring turn-up
so that all NEs on the ring can reach one another. Orderwire terminations (that is, the optics facilities
that receive and process the orderwire channels) are provisionable. Both express and local orderwire can
be configured as on or off on a particular SONET facility. The ONS 15454 supports up to four orderwire
December 2004
Alarm on Closure or Alarm on Open
Alarm severity of any level (Critical, Major, Minor, Not Alarmed, Not Reported)
Service Affecting or Non-Service Affecting alarm-service level
63-character alarm description for CTC display in the alarm log. You cannot assign the fan-tray
abbreviation for the alarm; the abbreviation reflects the generic name of the input contacts. The
alarm condition remains raised until the external input stops driving the contact or you provision the
alarm input.
Local NE alarm severity: A hierarchy of Not Reported, Not Alarmed, Minor, Major, and Critical
alarm severities that you set to cause output closure. For example, if the trigger is set to Minor, a
Minor alarm or above is the trigger.
Remote NE alarm severity: Same as the local NE alarm severity but applies to remote alarms only.
Virtual wire entities: You can provision any environmental alarm input to raise a signal on any
virtual wire on external outputs 1 through 4 when the alarm input is an event. You can provision a
signal on any virtual wire as a trigger for an external control output.
Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7
14.2.2 AIC Card
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