LED status
LED
function
OFF ON
FLASHING
(...)
GREEN
Correct connection with
public exchange modem
LINE
RED
Device initialization
Alternate
RED
GREEN
,
during establishment
of physical level or
connection failed (no
line).
LAN
GREEN
No data flow
Normal operation with
data flow
GREEN
4
3
2
1
GREEN
Free line
Busy line
Short switching on
during ring phase
2
1
ISDN
GREEN
Level 1 of line not
active
Level 1 of line active
GREEN
Power supply from
mains
EMERG
RED
No power supply from
mains. Operation with
backup battery
2
.
Slow (1Hz):
powering up
initialization.
Asymmetric:
initialization
RDY
(
FAIL
)
GREEN
Successful
initialization
Fast-3Hz:
malfunctioning
PWR
RED
No power supply
Power supply
Table 4-1: LED’s
2
Only with optional PBU.
Pag. 17
