How to write dial plan for NANP Area Code (JAMAICA)

how to write dial plan for JAMAICA which area code starts with +1 i tried to write dial plan in international out-bound but call is not getting placed.

No, the Area code for Jamaica is 876 , the + is a meta-character to reference your local international dial code, the 1, to the fact that Jamaica is in “Country Code” 1 which is NANP, i.e The US , Canada and some other locales including much of the Caribbean, check with your VSP as to how to dial.