Partyline: What is the wiring pin-outs for the CC-300 / CC-400 headsets to a 4-pin XLR-F connector?

Shown below are the 4-pin XLR-F connector wiring diagram for the recently released Clear-Com CC-300 and CC-400 series headsets.  Note that the wiring diagram shows the wire connections from the 4-pin XLR to a removable headset connector.  This allows for the rapid replacement of the entire headset cable assembly when the need arises for 4-pin XLR-F, 5-pin XLR male and female, 6-pin XLR male and 7-pin XLR female.
Also listed below are the impedance specifications for both models. 










Headphone
Type:  Closed-back
Driver: 40mm diameter, neodymium magnet, copper-clad aluminium wire voice coil
Frequency Response: 40Hz - 20kHz
Microphone
Element: Dynamic
Polar Pattern: Hyper-cardioid
Frequency Response: 300Hz - 20kHz
Impedance
CC-300 Headphone: 400 ohms ±30%; at 1kHz typical
CC-400 Headphone: 200 ohms ±30%; at 1kHz typical
Microphone: 200 ohms ±30%; at 1kHz typical

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