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Aria-34e
Digital Key Telephone System
When the MODU is allocated to a station port, the port does not require a station to be
connected.
If the MODU is installed the SIU(2) must be removed from the system.
Please refer to Figure 8.
4.5.13 SERIAL INTERFACE UNIT (SIU) INSTALLATION
The Serial Interface Unit is a plug in option card which locates on the MBU. The SIU provides
one (1) RS-232C port and provides an optional data path for a range of data streams generated by
the system. The SIU locates on the MBU by CN21. The system supports a total of two (2) SIU
cards when the MODU is not installed. The SIU is used for the functions of system maintenance,
PC-Admin, SMDR facilities and SMDI.
The following is a list of the system SIU outputs:
Admin database
Off-line SMDR (on demand)
On-line SMDR
SMDI
Statistical Information
System Trace data
It should be noted that two (2) SIU boards can be installed when the MODU in NOT installed.
In this case a shorting strap packed with the SIU must be inserted on pin #1 and #2 of MODU
connector CN21 on the MBU.
To install the SIU, plug edge connecting pins into locating sockets on MBU and push in. Ensure
screw on KSU frame is loose and then slide SIU mounting plate under screw and tighten.
Please refer to Figure 10 and Figure 11.
Aria Communications Pty Ltd.
A.C.N. 090 723 925
4-17
Installation
Rev 1.3
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