57MN024-010
TFAM
Case B
Once the TFAx has been switched on, its behaviour can be summarized as per the following
indicators:
1. When the Remote Unit is turned on, both the LEDs upon the warm side turn on for a
couple of seconds
2. After that, the unit’s green LED remains on (thus indicating proper power supply), while
the red LED switches off as soon as the master unit is turned on (meaning that DL optical
power is OK and no alarms are present).
3. Once the master unit has been switched on, the status of both LEDs should be
those indicated in Table 3.3.1. In case the red LED remains on, please refer to the
Troubleshooting section.
4. After being switched on, the Remote Unit should start up correctly and in order to be
recognized by the supervision management system, the corresponding TFLN master
optical TRX should carry out the discovery phase (please refer to the Supervision System
Manual for more details). During this phase, which can last for up to a max. 4min,
depending on the system complexity, the TFLN LED
blinks. Do not connect/disconnect
any cables or pieces of equipment during the discovery phase! This may result in the
identifi cation failure of the Remote Unit.
Note: in case discovery doesn’t start automatically, check through either the LMT or the
remote supervision for whether it has been disabled (refer to LMT or remote Supervision System
manuals for further information).
TFAx Case B Troubleshooting
Faults can be revealed by LEDs on the TFAx front panel, as well as by LMT or the Supervision
System (running on the remote supervision unit)
Both the LMT and the Supervision System are able to provide complete information about the
cause of the alarm. As a consequence, troubleshooting procedures can be immediate when
failure detection is carried out directly through either the LMT or the Supervision System.
ION-B modules are designed to exchange information, meaning that each Remote Unit can
receive failure notifi cations from its external equipment through dry-contact connections.
Moreover, the TFAx constantly monitors the optical signal received from its TFLN unit to control
optical losses.
Tables 3.3.2 shows a brief description of the alarms related to the Case B Remote Unit, with
reference to the corresponding alerted LEDs and to the actions to be carried out in case of a
fault.
As the Tables show, minor alarms (low priority alarms) are revealed only by either the LMTs or
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