Page 6-123
10/2008
AMT/PTD/TR/0020/2/7/EN
•
For remote clusters: the transmission time compensation on the loop must be configured in
the RMH board(s) of all the clusters that contain LDT boards to which DECT base stations are
connected. This configuration is performed using 11 switches (binary value: ON = 0; OFF =
1).
•
For a coaxial loop (each switch = no 12 metres):
•
For a fibre-optic loop, the value to be configured is given with the formula:
L = total length (in meters) of cable or fibre sections from the USB.
N = number of clusters between the USB and the cluster for which the calculation is
made.
•
For the DECT clock to be transmitted correctly on the loop, switches CA1, CA3 and CA4 on
the CSI card must be configured as follows (factory configuration):
Distance
(in metres)
RET11RET10 RET9 RET8 RET7 RET6 RET5 RET4 RET3 RET2 RET1 RET0
0 to 12
on
on
on
on
on
on
on
on
on
on
on
on
12 to 24
on
on
on
on
on
on
on
on
on
on
on
OFF
24 to 36
on
on
on
on
on
on
on
on
on
on
OFF
on
36 to 48
on
on
on
on
on
on
on
on
on
on
OFF
OFF
.......
192 to 204
on
on
on
on
on
on
on
OFF
on
on
on
on
204 to 216
on
on
on
on
on
on
on
OFF
on
on
on
OFF
216 to 228
on
on
on
on
on
on
on
OFF
on
on
OFF
on
228 to 240
on
on
on
on
on
on
on
OFF
on
on
OFF
OFF
.......
V
L
5 5
,
×
N
1
+
(
)
40
×
+
61
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=
Содержание X Series
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