AMT/PTD/PBX/0020/2/4/EN
01/2007
Page 123
6.2.5 INSTALLING THE LDT CARD
Proceed as follows to install an LDT card:
•
"Insert the LDT card in a CLX slot with synchronous bus access.
•
"Connect it to the synchronous bus with a plug.
•
"Connect it to a synchronizing clock input in the PBX in the case of a synchronizing T0
interface on the LDT card.
•
"Connect the remote power supply if S0 terminals or DECT base stations are used on
the LDT card.
•
"Connect the DECT synchronization (800 ms time signal) if retrieved by DECT base
stations from the S interface (M bit); the synchronization can be made in master or slave
mode.
6.2.6 LDT card layout
The LDT card can be fitted in the shelves in accordance with the configuration file. The card is
linked to the synchronous bus via the AVADQ plug connected in the front CFX position 23
(corresponding to the CLX position 7 on the LDT card).
For more detailed information, refer to document [12] in the reference documents.
The LDT card must be connected to a synchronising clock input in the PBX if a T0 interface is
synchronising on the LDT card.
Each group of 8 S interfaces must be connected to a complete junction (32 TS) on the
synchronous bus of the NeXspan 50. The LDTA card thus requires two junctions.
TOPRAD jumpers allows to recover the DECT synchronization signal sent to the LDT cards via
the backplane through the loop.
6.2.7 ISDN CLOCK INTERFACE
If a T0 interface is synchronizing on the LDT card, the RSU is connected with a cable HG4302A/
B or AHG0013A/B (21-pin J3 connector).
The synchronizing T0 can be allocated with any channel of the LDT card. The synchronizing
card (no more than one for simplex and duplex configurations) must be installed in the main rack
of the PBX because of the length of the clock cable. The maximums may be 2 or 4 if there is no
network or intersite T2.
CLX0
CLX1
CLX2
CLX7
Terminator
HR5124B
Trunks
J8 + J12
J9 + J13
J10 + J14
J11 + J15
Capacity
8 S (J8)
16S (J8, J12)
8 S (J9)
16 S (J9, J13)
8 S (J10)
16 S (J10, J14)
8 S (J24)
16 S (J11, J15)
Summary of Contents for NeXspan C
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