Pro Intercom MSM301 3-Circuit Add-On

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Master Station Module, Adds 3-Circuits to MS301 The MSM301 is an accessory to the MS301. When connected by its single cable, it adds 3 more circuits, for a total of 6, to the MS301 . The new circuits have all the functions of the original three, and are operated in the same manner. The MSM301 is powered by the MS301 and so does not add extra power to the system. It does allow the operator to communicate independently with three more circuits. Because each circuit of the MS301 and the MSM301 are capable of being either intercom or IFB channels, the need for a whole separate IFB system may be eliminated. The MSM301 occupies one rack space. Show more