Alcatel-Lucent OmniPCX Office Installation Manual page 59

Category 5 cable, FTP or STP, impedance 100 Ohms: maximum length 100 m.
4.2.1.7 CONNECTING AUXILIARY EQUIPMENT
All auxiliary equipment is connected via the AUDIO-IN, AUDIO-OUT and DOORPHONE
connectors of the CPUe-1, CPUe-2, CPU-1, CPU-2, and CPU-3 boards.
4.2.1.7.1 Connecting a Please-Wait message player
This is connected via the AUDCTRL output (control contact open when idle) and the AUDIN
input of the AUDIO-IN connector.
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