doc: Clarify CallRemoved behavior

diff --git a/doc/voicecallmanager-api.txt b/doc/voicecallmanager-api.txt
index 56dba8b..c1087f7 100644 (file)
--- a/doc/voicecallmanager-api.txt
+++ b/doc/voicecallmanager-api.txt
@@ -189,6 +189,12 @@ Signals            CallAdded(object path, dict properties)
                        released.  The object path is no longer accessible
                        after this signal and only emitted for reference.
 
+                       NOTE: If the VoiceCallManager interface becomes
+                       unavailable, this signal is not guaranteed to be
+                       emitted for remaining calls.  The applications are
+                       expected to monitor changes in Modem.Interfaces
+                       property.
+
                PropertyChanged(string property, variant value)
 
                        Signal is emitted whenever a property has changed.