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Speakerphone (digital duplex)
Each digital key phone allows an additional two wire device to be connected to the system with a unique extension number
In recognition of their superior user-friendliness
Support for 12 and 24 button expansion modules
3M™ PELTOR™ Boom Microphone and Down Lead Category_Best4Systems/Avalle Headsets/QD Headsets Speakerphone (digital duplex)220 ohm dynamic noise cancelling microphone, Military Standard 2 pin nexus plug Used on all MT series headsets
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