3.13.1 Starting the PBX
Confirming the CO Line Connection
After initialization, program the PBX and connect CO lines to the PBX.
To confirm that the CO lines are successfully connected, dial [ ] [3] [7] + CO line number (3 digits) on a PT,
or press the PT's S-CO button. You will hear a dial tone if the CO line is available and connected.
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Installation Manual
Document Version 2011-10