Aastra NeXspan C, Руководство по установке

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Page 156 01/2007 AMT/PTD/PBX/0020/2/4/EN
Case of multisite F4/F6 or F4/F1 device with F4 equipped with an FPHBG
back plane and CSH, LDS and/or LDT cards
The slave PBX must be synchronized via an inter-site link (2.048 MHz clock).
The base stations must be wired in three pairs (combination of LD4/LDS (or LDT), LD4NX/LDS
(or LDT) card). The synchronization pair carries the 800 ms clock.
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 7-21: Contiguous multisite F4/F6 or F4/F1 (with F4 fitted with FPHBG/CSH/LDS/LDT card)
synchronising inter-site link
2.048 MHz clock
R
S
P
F4
L
D
S
/
L
D
T
F1
or
F6*
L
D
4
or
L
D
4
N
X
IP network
(2)
master base
slave base
slave base stations
800 ms clock synchro pairs
S0 bus
S0 bus
master PBX
slave PBX
* on F6, base stations can be connected to the front panel of UCT-S cards.