Plural form of duplex.

What is the correct plural of duplex?

duplex. /ˈduːˌplɛks/ Brit /ˈdjuːˌplɛks/ plural duplexes.

Is it duple or duplex?

As adjectives the difference between duplex and duple

is that duplex is double, made up of two parts while duple is (rare) double.