Section 24.1.2 – Westermo RedFox Series User Manual
Page 537
Westermo OS Management Guide
Version 4.17.0-0
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and
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24.1.2
Alarm sources
As of WeOS v4.17.0 the following alarm sources are supported:
❼ Power failure: If the unit is equipped with redundant power feed (or redun-
dant power supply), an alarm can be triggered if one of the feeds lack input
power.
Note: if all power is lacking on all feeds, the unit is powerless and cannot
trigger alarms via SNMP traps or remote logging. To detect such a situation
remotely, the operator could poll the unit (e.g., by pinging the unit on a
regular interval). The drawback is that it is difficult to distinguish problems
in the intermediate network from problems in the monitored device.
An alternative is to use out-of-band signalling, e.g., via GPRS equipment
connected to digital-out to get an alarm notification instantly if a device
goes down.
❼ Link alarm: It is possible to configure link alarm triggers to react when a
link goes down (and up).
❼ Digital-In: Alarms can be triggered depending on the presence of input volt-
age/current on the Digital-In pins of the Digital I/O connector.
❼ Temperature sensor alarms: Temperature alarm triggers can be configured
to react when the temperature rises above (or falls below) some defined
threshold.
❼ FRNT status: The FRNT ring status trigger will react when an FRNT ring is
broken (bus mode) or healed (ring mode)
❼ Hardware failure: Hardware alarms triggers notifies that the unit has de-
tected a hardware failure (typically if an unsupported SFP is inserted).
❼ SHDSL/xDSL SNR Margin: On devices with SHDSL/xDSL ports, alarms can be
triggered when the SNR margin falls below some configured threshold.
❼ Link Fault Forward (LFF): On devices with SHDSL ports, alarms can be trig-
gered when the remote SHDSL switch indicates it has link down on its Eth-
ernet port. That is, this feature can be used in topologies where an Ethernet
1
Only an FRNT focal point can determine the ring status with certainty.
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