Page 154 01/2007 AMT/PTD/PBX/0020/2/4/EN
7.6.3 F1/F2/F4 or F6/F2/F4 contiguous multi-site configuration
The slave PBXs must be synchronized via inter-site links (2.048 MHz clock).
The base stations must be wired in three pairs (F2 has no synchronization port + LD4/LDS,
LD4NX/LDS combination). The synchronization pair carries the 800 ms clock.
Note:
F2 has no synchronization ports; so for a multisite configuration between an F2-F4 fitted
with FPHBG/CSH or an F2-F4 fitted with FPHBG2/CSI/BCSI, the configuration of the
multisite synchronization is the same.
Note: The LD4X mode (removing the J14 jumper on an LD4NX card and used to implement
additional functions) is only compatible on NeXspan S/L/D with software release R4.1
and above.
(1)
: use a repeater if there are more than 5 slave base stations
(2)
: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 7-19: F1/F2/F4 or F6/F2/F4 contiguous multi-site configuration
synchronizing
intersite link
R
S
P
F2
L
D
S
F1
or
F6*
L
D
4
or
L
D
4
N
X
IP network
(2)
master base station
slave base stations
(1)
slave base stations
(1)
800 ms clock synchro pairs
S0 bus
S0 bus
slave PBX
slave PBX
F4
L
D
S
or
L
D
T
master PBX
slave base stations
(1)
S0 bus
synchronizing
intersite link
* on F6, base stations can be connected to the front panel of UCT-S cards.
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