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Connecting a PA (Public Address) amplifier
Any of the extensions on the system, with the exception of the programming extension, can
be programmed as a PA position. The PA is connected to the AB pair of the extension.
Mitel 3000 can work with two types of paging amplifiers on an extension port; those designed
to work on telephone systems, and those that only offer a microphone input.
If the PA Amplifier is one designed to work on telephone systems then the extension port can
be directly connected to the PA amplifier. On the amplifier, typically, the input is marked
"telephone" and has the internal 600 ohm transformer isolated input built in.
If the paging amplifier is the type that provides a microphone input a 1:1 Audio Isolation
transformer with a 600 to 900 ohm impedance must be connected between the extension port
and the microphone input.
Connecting a PC or Printer to the Serial Port
A 2 metre RS232 (Serial) to V24 (RJ10) cable is provided.
Connect the cable to the RJ10 connector on the CCU.
Connect the serial port RS232 to the PC or to the DB9-DB25 converter if connecting to the
printer.
The pinouts from the RS 232 interface of the DB9 to the RJ10 are:
Central Bell
If a central bell is required, connect it to a spare extension position and include the extension
in the Ringing Groups that require the bell.
Mitel 3000 Australia Installation and Maintenance Manual
DB9 connector
RJ11 plug
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