My XAH also continues to call on a regular basis, but because of my lack of responsiveness, he usually resorts to an email (if it is important). Otherwise, the calls would be much more frequent. At least he is no longer referring to me as his wife; only as his "dear friend". Sheesh!
I use a specific ring tone for him so that I can put him on ignore, and check his voicemails at my convenience. I have also mastered the art of "quick calls". He tends to go on at length or talk in circles in order to continue the conversation. I am able to redirect and conclude the calls very efficiently now (being a First Grade teacher has its merits).