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Aria-34e
Digital Key Telephone System
4.5.8 SOFTWARE ROM INSTALLATION
Software ROMS contain the integrated software to operate the system.
In the event of a software upgrade or change the ROM chips are inserted into their correct socket
by an authorised technician. Please refer to anti-static procedures in section 4.1.12 when
handling the boards and ROM chips.
Note: Correct tools and procedure for changing ROM chips must be followed.
4.5.9 MAIN BOARD UNIT (MBU) INSTALLATION
The MBU is installed during production. It comprises of the main processor, six(6) digital
terminal interface circuits, seven(7) card slots for optional boards, system memory, real-time
clock circuitry and data communication circuits which transmit and receives to/from peripheral
cards. The MBU may be equipped with four daughter boards; a MEMU for RAM expansion, a
MODU for remote access to the system, a PLLU2 for system synchronization when using digital
exchange line services and a SIU for serial data transmission. The MBU also provides ports and
contacts for the external paging, external Music On Hold , Alarm contacts and external control
contacts.
Refer to Figure 7 and Figure 8.
It should be noted that two SIU boards can be installed when the MODU is NOT installed. An
optional jumper pin which is contained in the SIU must be inserted between pin#1 and pin#2 of
MODU connector (CN21) in this case.
Background Music and Music On Hold Connection
Music On Hold, as well as background music, can be connected via a customer
provided radio, tape-deck etc. 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 MOH port on the MBU.
General Purpose Relay Contacts
The Aria-34e provides two (2) dry relay contacts to activate optional external
equipment such as Loud Sounding Alarms on CO line ring etc. Connections for this
feature are made on the MDF and CHAMP cable assembly devices must be fitted.
AUSTEL Approved devices with ports assessed as TNV do not require an LIU. An
AUSTEL Approved LIU must be fitted to these ports when non-AUSTEL Approved
devices are specified, and this LIU must be connected as close as possible to the
connecting device.
Aria Communications Pty Ltd.
A.C.N. 090 723 925
4-13
Installation
Rev 1.3
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