Aastra X series Installation And Implementation Manual page 154

Indicators
There are several LEDs on the front panel of UCT cards providing information about
synchronisation clock operation and DECT multi-site synchronisation:
Note: "S.DECT" and "MST DECT" LEDs are not available on the front panel of UCT-S12 and
UCT-C cards.
Note: For NeXspan D, "S.DECT" and "MST DECT" LEDs are available on the IUCT-D card
front panel.
INDICATOR
S.EXT ON green
(green/red) Off
S.DECT ON green
(green/red) ON red
Flashes green
Flashes red
MST DECT On
(green)
Table7: Meaning of UCT/IUCT-D card synchronisation LEDs
• Operation in Simplex mode
1
Normal operation: the master is synchronised on the network (S.EXT, S.DECT and
MST.DECT LEDs lit). The slaves receive the DECT synchronisation signal from the master
(S.DECT LED lit green).
2
Break in the cable between the master and the first slave: the slave detects a malfunction
(S.DECT LED lit red); after a few moments the slave becomes master and generates its own
synchronisation to the other slaves (S.DECT and MST DECT LEDs lit).
• Operation in Duplex mode
1
Normal operation: it is assumed that the two masters, "priority" and "not priority", are
connected to the PSTN network. The priority master supplies the entire multi-site network
with the synchronisation single (S.EXT, S.DECT and MST.DECT LEDs lit). The "not priority"
master and the slaves receive the DECT synchronisation signal from the priority master
(S.DECT and S.EXT LEDs lit on the not priority master, and S.DECT LED lit green on the
slaves).
2
The link between the "priority" master and the PSTN is broken (S.EXT LED out). This
information is sent (see wiring in section 8.4.3) to the "not priority" master. The "not priority"
master takes over, becomes master and supplies the synchronisation signal (S.EXT,
S.DECT and MST.DECT LEDs lit) to the entire network (S.DECT LED lit green on "priority"
master and slaves).
AMT/PTD/TR/0020/2/7/EN
STATE
Network synchronisation clock correct
Synchronisation clock fault alarm
DECT synchronisation correct
DECT synchronisation loss alarm
Synchronisation search
Polarity inversion in the wiring of the DECT synchro signal
Synchronisation master PBX
10/2008
EXPLANATION
Page 8-154