Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
Alarm Interface Controller Card
You can program each of the four input alarm contacts separately. Choices include Alarm on Closure or
Alarm on Open, an alarm severity of any level (Critical, Major, Minor, Not Alarmed, Not Reported), a
Service Affecting or Non-Service Affecting alarm-service level, and a 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.
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:
• Local NE alarm severity: A hierarchy of non-reported, non-alarmed, minor, major or 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.
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.
4.10.2 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
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 (i.e. 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 channel
terminations per shelf. This allows linear, single ring, dual ring, and small hub-and-spoke
configurations. Keep in mind that orderwire is not protected in ring topologies such as BLSR and UPSR.
Caution Do not configure orderwire loops. Orderwire loops cause feedback that disables the orderwire
channel.
The ONS 15454 implementation of both local and express orderwire is broadcast in nature. The line acts
as a party line. There is no signalling for private point-to-point connections. Anyone who picks up the
orderwire channel can communicate with all other participants on the connected orderwire subnetwork.
The local orderwire party line is separate from the express orderwire party line. Up to four OC-N
facilities for each local and express orderwire are provisionable as orderwire paths.