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9. Mainframe alarm output, audio input and record output
1. Connect alarm flashlight and speaker onto the ALM and COM connecting terminals at the rear of the mainframe.
In case of the extension calling the mainframe, the alarm indicator light blinks, and the speaker will flash and give
an alarm.
2. Input audio signals (for example, audio signal output of recorder and player, CD, MP3 and CD) from the music and
com connecting terminals at the rear of the mainframe to serve as playing background music.
3. Connect recording equipment (LB-PT is recommended) to the REC and COM connecting terminals of the
mainframe to record the talk between the extension and mainframe.
10. Check and testing
A. Mainframe to failing extension check
Connect the wires and be sure there is no error after check. Turn on the power of the mainframe, and the mainframe
will automatically detect extensions. The mainframe checks extensions one by one from extension 1, the extension
is normal, and the indicator light blinks once, if there is any extension wrong or the channel is not connected with an
extension, the corresponding routing indicator light will turn green and hold, after all 30/60 channels of extensions
are checked, the green indicator light maintains for five seconds before going out (please record the code for the
green indicator light, manual selection is available for the extension routing switch on the mainframe, if the extension
cannot be chosen, it means that there is something wrong. Shut down the device and recheck). After check, the
mainframe will automatically recover to the standby status.
B. Mainframe to display check
After the mainframe is started up, the dot matrix display displays year, month, date, time and 'Please keep quiet!' In a
rolling manner, and then waits for calls from extensions.
Digital and analog recording cards/log
Alarm indicator light
Sound source equipment
Mainframe rear diagram
