--- contrib/scripts/sip_to_pjsip/sip_to_pjsip.py	(Asterisk 13.10.0)
+++ contrib/scripts/sip_to_pjsip/sip_to_pjsip.py	(working copy)
@@ -442,2 +445,5 @@
     ['qualifyfreq',        set_value('qualify_frequency', type='aor')],
+    ['maxexpiry',          set_value('maximum_expiration', type='aor')],
+    ['minexpiry',          set_value('minimum_expiration', type='aor')],
+    ['defaultexpiry',      set_value('default_expiration', type='aor')],