If for some reason the message light, a bright red LED, comes on with NO message signals received, remove the telephone from the line and adjust the switch marked S1/S2 from the S1 position to the S2 position. When re- connected, the telephone should now function correctly.
It must be pointed out that various PABX types have individual system requirements in order for visual message waiting signals to be detected. If there is a signal present, the telephone will detect it. If there is no signal, then it will not be detected! If in any doubt, please refer to your telephone manager or to your supplier.
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