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Aria-34e
Digital Key Telephone System
4.6.2 SIU RS-232C PORT WIRING
The SIU has one industry standard 9 pin RS-232C connector. The RS-232C ports are
connected by 9-pin "D" connectors as shown in . Note that the communication
settings are 9600 bps, 8 bits data, no parity bit and 1 stop bit.
The SIU(1) position on the MBU provides serial communication control signals such
as TXD, RXD, CTS, RTS, DSR, DTR and ground. But the SIU(2) position does not
provide all these signals and only provides three(3) control signals which are TXD,
RXD and ground. For this reason, when using two SIUs, care must be taken to ensure
correct connection.
4.6.3 INSTALLATION TAILS - TERMINATION PROCEDURE
Using a suitable wiring tool, remove sufficient outer PVC sheath to expose the
metal shielding material wound around the cluster of conductors. Carefully
remove this shielding material until the required amount of twisted pair
cabling to route to the termination point on the MDF is exposed. Care must be
taken in order to prevent breaking the cable and exposing conductive material
within. Typically a KRONE Insulation Displacement Type termination point
would be used.
Aria Communications Pty Ltd.
A.C.N. 090 723 925
Figure 26. WIRING FOR SIU(1)
Figure 27. WIRING FOR SIU(2)
4-29
Installation
Rev 1.3
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