Aastra X Series, Installation And Implementation Manual

Page: 83 / 217

Page 4-83 10/2008 AMT/PTD/TR/0020/2/7/EN
Table8: Description of switches SW3 to SW6 on the LD4 RJ card
SW7
and
SW8
: the jumpers allow the selection of a 40 V or 48 V power supply.
Note:
The power supply units of the NeXspan range do not supply ISDN 40 V. To supply 40 V
to sets and/or base stations, connect an external power supply unit to the T3 connector
on the LD4 RJ card.
Table9: Description of switches SW7 and SW8 on the LD4 RJ card
4.4.3 Installing the LD4 RJ card
The possible slots and restrictions for the LD4 card in a NeXspan cabinet are the same as for the
LD4NX card (see Section 4.6.5).
4.4.4 Connecting base stations
Each base station is connected to an ISDN S0 (BRI) interface of an LD4 RJ card, and uses two
pairs: 1 transmit pair and 1 receive pair.
Note:
If there are a DECT base station and an S0 terminal (other than the base station) on the
same card, the base station must be powered with 40V. The NeXspan power supply
SW7 and SW8 Positions Function
1-2 48 V selected
2-3 40 V selected
40
48
3
2
1 3
2
1
40
48
3
2
1 3
2
1