Product manual

Installation instructions, Central Processing Unit (CPU2 with External Synchronisation) – REX BRD9032,
REX BRD9033 and REX BRD9034,
Technical Product Manual - DCT1800-GAP
TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C
© 2006
37
Chapter 8 Central Processing Unit (CPU2 with External
Synchronisation) – REX
BRD9032, REX BRD9033
and REX
BRD9034,
8.1 General
This CPU2 board can be used in a stand alone Radio Exchange (RE) system, or in REs connected
to a Switch Module (SWM) in an Enterprise Mobility Node (EMN) system.
Maintenance
The CPU2/EMN contains the following field-exchangeable parts (see figure 24):
• CPU2/EMN poller firmware
• Lithium battery (LithiuMCell BR2325-1Hc) (soldered)
The lithium battery is a back-up power supply for the real-time clock on the CPU2/EMN board. This
clock updates the system date (year, month, day) and time (hours, minutes, seconds).
Note:
See warning about lithium battery in section ‘Safety and regulatory information’ in this manual.
8.2 Board description
Jumpers
• J4 synchronization jumper
The framing of the digital trunk between the Switch Module (SWM) in the EMN, and the RE must be
synchronized. The jumper determines whether the CPU2/EMN runs synchronous with a host PBX or
not. The jumper must be set as follows:
– DTU is used and the SWM (switch module) is synchronised with a PBX having a clock stability
better than 2 p.p.m.: Set the jumper to the ‘DCT1800-GAP slave’ position.
• J13 battery activation jumper
• J14 synchronization jumper, and
• J16 synchronization jumper
If several Radio Exchanges (RE) are used in a system the DECT line between the CPU2/EMN boards
must be synchronized. One CPU2/EMN board can support nine (3 x 3) CPU2/EMN slaves, see figure
23. The jumper must be set as follows:
– The CPU2/EMN board is used as a master for other CPU2/EMN boards in the system. Set
the jumpers J14 and J16, to the ‘CPU2/EMN master’ position. In this case the jumper J4 must
be set to the ‘DCT1800-GAP slave’ position.
– The CPU2/EMN board is used as a slave in the system. Set the jumpers J14 and J16, to the
‘CPU2/EMN slave’ position. In this case the J4 jumper has no function.