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Aria-34e
Digital Key Telephone System
External Paging Ports
One (1) external paging amplifier may be connected to the External Paging port on
the Aria-34e MBU. Connection for this feature is made via an AUSTEL Approved
MOH LIU (must be fitted as close as possible to the connecting device) through the
External Paging port on the MBU.
Alarm Switch Connection
There is an alarm function port on the MBU which provides for a normally open or
closed dry contact set as an input. Connections for this feature are made on the MDF
and CHAMP cable assemblies to the MDF must be fitted. AUSTEL Approved dry
contact devices assessed as TNV do not require an LIU. An AUSTEL Approved LIU
must be fitted to this port when non-AUSTEL Approved devices are specified, and
this LIU must be connected as close as possible to the connecting device.
Figure 8. MBU with MODU, SIU, MEMU and PLLU2
The MBU contains a lithium dry-cell to retain the contents of the programming database and
real-time clock functions during power off conditions. The battery is soldered to the MBU, and is
enabled by an on/off DIP switch (SW3). Please ensure the DIP switch is ON before the MBU
installation. Please refer to Figure 9.
Aria Communications Pty Ltd.
A.C.N. 090 723 925
4-14
Installation
Rev 1.3
Comment [N1]:
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