User's Manual

Manual for ION™-M7P/17P (M-cab)
& Subassemblies
Page 35 MF0145A7A_uc_FCC_modif.doc
5. ALARMS
5.1. BITe AND ALARMS
The Built-In Test (BITe) concept comprises the monitoring of the power supplies, the
power amplifiers and the optical interface.
All alarms occurring can be checked via software at the Master Unit.
5.2. HANDLING OF ALARMS
A message is transmitted to the Master Unit when the software acknowledges a valid
alarm.
A new alarm message will not be repeated if the reason for the alarm is cleared or if
the alarm continues.
A new alarm message will be generated if the alarm is interrupted for at least five
seconds after acknowledgement.
5.3. ALARM STATUS
Refer to the corresponding software documentation of the Master Unit for details.
5.4. STATUS LED ALARMS
For local supervision, a status LED on the connector flange of the Remote Unit gives
an indication of possible reasons for alarms. This table shows possible on-site
measures that could be checked before referring to the Master Unit alarm list.
Status LED Indication Alarms Possible on-site measures
Green
No alarm 
Status ok
Door alarm Close the door (RUs with door).
Alarms not directly related to RU:
External alarms
Check externally connected devices.
Optical alarm Rx
Check fibre loss of optical link.
Check optical connectors.
Clean optical connectors.
(MU: Check optical output power of
corresponding OTRx at Master Unit).
Orange
ALC alarm
(MU: Decrease DL input power of
affected band).