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  Comes with a Red/White/White/Black (R/W/W/B) Plug.
This Handset will work even if your current Handset has a Red/Green/Black/Yellow combination.  In this case, you will have to cross-reference the Wiring Scheme on the Internet for proper wiring instructions.  There is a Black modular four-pin plug on this cord. 
 
 
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