11.1.3 Message Waiting
If Distinctive Dial mode is enabled, dial tone 4 will be sent to an extension when a message has been left on the extension. (→ 4.1.3 Dial Tone)
•SLT with a Message Waiting Lamp
The lamp activates in the same way as the MESSAGE button on a PT provided an EMSLC or MSLC card is connected to the PBX. The preferred Message Waiting Lamp light pattern can be selected from the twelve patterns shown below. System programming for each extension port is required to use this feature.
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