diff -r 6aaf0276100e -r c76a0b1755b9 phoneengine/phoneservices/src/dtmfservice.cpp
--- a/phoneengine/phoneservices/src/dtmfservice.cpp	Thu Sep 02 20:26:16 2010 +0300
+++ b/phoneengine/phoneservices/src/dtmfservice.cpp	Fri Sep 17 08:29:19 2010 +0300
@@ -41,7 +41,7 @@
 {
     PHONE_TRACE2("keyToPlay:", keyToPlay);
     if (!hasCapability()) {
-        return;
+        return KErrPermissionDenied;
     }
     m_parameters.SetKeyCode(keyToPlay.unicode());
     TRAPD(ret, m_call.HandlePlayDTMFL() );
@@ -52,7 +52,7 @@
 {
     PHONE_TRACE;
     if (!hasCapability()) {
-        return;
+        return KErrPermissionDenied;
     }
     return m_call.HandleEndDTMF(); 
 }