User Manual

128
User Manual
RF ports
• 1 DL RF input port
• 1 auxiliary DL RF input port
• 1 UL RF output port
• 1 auxiliary UL RF output port
Note: nominal input levels required at RF ports is +10dBm (please refer to
datasheet for further information), as well as RF outputs may require a power
adjustment to fill within the BTS receiving range.
In order to fulfil these requirements, external UL and DL attenuations may be
required (see TBSI module)
.
Optical ports
• 4 DL optical output ports (SC/APC)
• 4 UL optical input ports (SC/APC)
TFLN visual alarms
The TFLN front panel is provided with 6 LEDs (see on the right), showing
status and alarm information.
LED meaning is reported on the rightward table.
Further information about alarm status is delivered by Britecell Plus
supervision system.
Note: In case the four TFLN optical output ports are not all connected to
remote units, the unused ports must be properly masked at commissioning in
order to avoid spurious alarms (please refer to LMT manual).
TFLN
Label LED colour Meaning
= Green
Power supply status OK
┌┘
Red
General TFLN failure, it can be:
- TFLN laser failure
- UL or DL amplifier failure
- TFLN short circuit
1 Red
Low UL optical power received
from remote unit 1 (fault in optical
link 1 or remote unit 1 failure)
2 Red
Low UL optical power received
from remote unit 2 (fault in optical
link 2 or remote unit 2 failure)
3 Red
Low UL optical power received
from remote unit 3 (fault in optical
link 3 or remote unit 3 failure)
4 Red
Low UL optical power received
from remote unit 4 (fault in optical
link 4 or remote unit 4 failure)
Fig. 5.10 :LED panel
on TFLN front side
Tab. 5.4: Meanin
g
s of the LEDs on TFLN front
-
side