AMT/PTD/TR/0020/2/7/EN
10/2008
Page 7-134
7.2.5 installing the ldt board
Proceed as follows to install an LDT board:
•
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 board.
•
Connect the DECT synchronization (800ms time signal) if retrieved by DECT base
stations from the S interface (M bit); the synchronization can be made in master or slave
mode.
7.2.6 LDT card layout
The LDT card can be fitted in the shelves in accordance with the configuration file. The card is
connected to the synchronous bus via the AVADQ terminator inserted only for slot 23
(corresponding to CLX7 slot on the LDT card).
For more details, refer to "Reference documents" on page 13.
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 500. The LDTA card thus requires two junctions.
Note:
TOPRAD jumpers are used to retrieve the 800 ms top from the back plane conveyed by
the loop. This top is generated by the CSI card which, by default, is configured in master
mode.
7.2.7 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
board (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
Bouchon
HR5124B
Jonctions
J8 + J12
J9 + J13
J10 + J14
J11 + J15
Capacité
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 X Series
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