Aastra X Series, Installation And Implementation Manual

Page: 164 / 217

AMT/PTD/TR/0020/2/7/EN 10/2008 Page 8-164
8.6.2 F2/F2 or F4/F2 contiguous multi-site configuration
The slave PBX must be synchronised via an inter-site link (2.048 MHz clock).
The base stations must be wired in two pairs. The synchronisation signal is carried by the M bit in
the S frame.
One LDS or LDT card must be declared master and the other slave. The master card 800 ms
clock (SYN outgoing differential signal) must be connected to the slave card (via the distribution
frame - terminal strip 4G).
Note:
F2 has no synchronization ports; so for a multisite configuration between an F2-F4 fitted
with FPHBG/CSH, F2-F4 fitted with FPHBG2/CSI/BCSI or an F2-F4 fitted with FPS/CSI/
BCSI, the configuration of the multisite synchronization is the same.
(1)
: even in an IP multi-site network, as the IP network is not synchronising, the PBXs must be
connected by a synchronising inter-site link.
Figure 7-18: F2/F2 or F4/F2 contiguous multi-site configuration
F2
L
D
S F2
or
F4
L
D
S
/
L
D
T
IP network
(1)
S0 bus
S0 bus
slave PBX
master PBX
master card
slave card
800 ms clock
DECT base
DECT base
synchronising inter-site link
2.048 MHz clock
.