Index: apps/app_dial.c
===================================================================
--- apps/app_dial.c	(revision 36170)
+++ apps/app_dial.c	(working copy)
@@ -471,8 +471,12 @@
 						o->chan = ast_request(tech, in->nativeformats, stuff, &cause);
 						if (!o->chan)
 							ast_log(LOG_NOTICE, "Unable to create local channel for call forward to '%s/%s' (cause = %d)\n", tech, stuff, cause);
-						else
+						else {
 							ast_channel_inherit_variables(in, o->chan);
+							/* make sure that channels can talk to each other */
+							/* (avoid "Dropping incompatible..." messages) --mike@firmix.at */
+							ast_channel_make_compatible(o->chan, in);
+						}
 					} else {
 						if (option_verbose > 2)
 							ast_verbose(VERBOSE_PREFIX_3 "Too many forwards from %s\n", o->chan->name);
@@ -1068,8 +1072,13 @@
 				tmp->chan = ast_request(tech, chan->nativeformats, stuff, &cause);
 				if (!tmp->chan)
 					ast_log(LOG_NOTICE, "Unable to create local channel for call forward to '%s/%s' (cause = %d)\n", tech, stuff, cause);
-				else
+				else {
 					ast_channel_inherit_variables(chan, tmp->chan);
+					/* make sure that channels can talk to each other */
+					/* (avoid "Dropping incompatible..." messages */
+					/* not sure if it is needed here too or only above) --mike@firmix.at */
+					ast_channel_make_compatible(tmp->chan, chan);
+				}
 			} else {
 				if (option_verbose > 2)
 					ast_verbose(VERBOSE_PREFIX_3 "Too many forwards from %s\n", tmp->chan->name);