Page 80 01/2007 AMT/PTD/PBX/0020/2/4/EN
4.5.2 Switch settings
Note:
The Master/Slave micro-switch of previous LD4 cards no longer exists. The LD4NX ST
card is always in DECT slave mode; it cannot generate the DECT clock.
The LD4NX ST card has no micro-switch for downloading the flash memory with a BOF3
type tool (automatic detection).
• Micro-switch CA1 (HVAL) is used to configure synchronization (T0).
Table 12: Description of the CA1 switch on the LD4NX ST card
• Jumpers J1_1, J1_2, J1_3 and J1_4 are used to enable the remote power supply (40 V or
48 V) of each interface where an S0 interface is connected:
Caution: In T0, remove the jumpers (conflict between the 48V supplied by the
system and the 40V supplied by the public exchange).
• J1_1: Remote power supply for interface 0
• J1_2: Remote power supply for interface 1
• J1_3: Remote power supply for interface 2
• J1_4: Remote power supply for interface 3
Note:
J2_1, J2_2, J2_3 and J2_4 are storage positions for jumpers.
• A jumper positioned on SW5 or SW6 is used to select the 40V or 48V remote mains supply.
• Jumper positioned on SW5 (factory position) is used to select the 48V power supply.
• Jumper positioned on SW6 is used to select the 40V power supply.
Note:
The jumper status of remote supply and synchronization for an LD4NX ST card in LD4X
mode can be displayed by MMC (menu 3-2-4, "ISDN board switches status", see Figure
4-18).
• Jumper J14 is used to select the card's operating mode (LD4N or LD4X) :
• leave the jumper in factory position 2-3 for a LD4N configuration,
• plug the jumper into pins 1 and 2 or remove the jumper for a LD4X configuration used to
implement additionnal functions.
MICRO-SWITCH CA1 (HVAL) EXPLANATION
ON Leave set to ON position. If the LD4NX ST card is fitted in a synchronising
slot, the ON position allows the PBX to take the ISDN network clock as
reference clock. In a non-synchronising slot, CA1 has no impact. The
synchronising positions in an XL cabinet are slots 1-00 to 1-05. For an XS
cabinet, all positions are synchronising.
OFF Do not set it to OFF position (in OFF position, the ISDN clock is not taken
as reference, whatever the slots).
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