What did ancient egyptians communicate with?

This is an extremely broad question. Ancient Egypt spanned some 3000 years, and hence, methods of communication changed drastically over time.
In summary, some more 'trivial' communication (eg taxes, medical texts etc) was written on papyrus scrolls, writing in hieratic script (a kind of 'short hand' heiroglyphs) but more pressing matters, such as letters between countries were chiseled. The Amarna Letters from the 18th Dynasty reign of Amenhotep IV (Akhenaten) are written on large stone slabs, in the Babylonian language (the contemporary political language.) The most unimportant of things were written on bits of pottery.

In conclusion, the Egyptians communicated in many ways, over many years. You'll have to look up specific things if you want a specific answer.