diff --git a/configs/zapata.conf.sample b/configs/zapata.conf.sample
index ae8e268709..22ce75b4c3 100755
--- a/configs/zapata.conf.sample
+++ b/configs/zapata.conf.sample
@@ -199,7 +199,9 @@ immediate=no
 ; progress attempts to determine answer, busy, and ringing on phone lines.
 ; This feature is HIGHLY EXPERIMENTAL and can easily detect false answers,
 ; so don't count on it being very accurate.  Also, it is ONLY configured for
-; standard U.S. tones 
+; standard U.S. tones.  This feature can also easily detect false hangups.
+; The symptoms of this is being disconnected in the middle of a call for no
+; reason.
 ;
 ;callprogress=yes
 ;