SOCIETA’ ITALIANA COSTRUZIONI ELETTRONICHE S.r.l.
VIA TAZIO NUVOLARI, n° 53 - 55061 CARRAIA - (LU)
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E - M a i l : i n f o @ s i c e t e l e c o m. i t
5
Fault Management
5.1.
General Fault Management Functions
Fault Management performs the detection, localisation, isolation and reporting of failures of the
transmission signals processed by the equipment. The failures may occur due to:
Transmission Failures
Equipment Failures.
Failures are reported via the management interface to the CT/OS and generate alarm indications
at the CT/OS.
In addition the system supports
Visual indication by means of LEDs on the front panel of the PSE
External alarm contacts, which can be used for summary signalling to supervisory systems.
Note:
These additional facilities are not available in the PoE configuration.
Card Alarms Indication
The following LEDs are provided at the front plate unit of the PSE:
In case the link between ODU and PSE does not work properly, all LEDs (other than Power LED)
blink.
Alarm Contacts and Housekeeping Contacts
The system provides some dry contacts which can be used to:
Flag failures detected inside the system (summary alarms) by 3 output contacts (Actors)
Send configuration commands to outside equipment by 2 output contacts (Actors). These
commands are controlled by CT (Inventory
and Housekeeping
window par. 2.12)
receive failure conditions detected outside the unit (external alarms) by 2 input contacts
(Sensors). This external alarms are displayed by the CT (Inventory
and Housekeeping
window par. 2.12)
Table 5-23: Internal Alarm Contacts
