diff --git a/src/lib/ebus/filereader.h b/src/lib/ebus/filereader.h
index 62944abf..59dcfab9 100644
--- a/src/lib/ebus/filereader.h
+++ b/src/lib/ebus/filereader.h
@@ -90,6 +90,7 @@ public:
 		size_t firstDot = filename.find_first_of('.', lastSep+1);
 		string defaultDest = "";
 		string defaultCircuit = "";
+		string defaultSuffix = "";
 		if (lastSep!=string::npos && firstDot==lastSep+1+2) { // potential destination address, matches "^ZZ."
 			result_t result;
 			defaultDest = filename.substr(lastSep+1, 2);
@@ -107,7 +108,7 @@ public:
 						if (nextDot!=string::npos && nextDot>endDot+1) { // potential index suffix, matches "^ZZ.IDENT.[0-9]*."
 							parseInt(filename.substr(endDot+1, nextDot-endDot-1).c_str(), 10, 1, 16, result, NULL);
 							if (result==RESULT_OK)
-								defaultCircuit = filename.substr(firstDot+1, nextDot-firstDot-1); // IDENT.[0-9]*
+								defaultSuffix = filename.substr(endDot, nextDot-endDot); // .[0-9]*
 						}
 					}
 				}
@@ -128,7 +129,7 @@ public:
 			if (m_supportsDefaults) {
 				if (line[0] == '*') {
 					row[0] = row[0].substr(1);
-					result = addDefaultFromFile(defaults, row, it, defaultDest, defaultCircuit, filename, lineNo);
+					result = addDefaultFromFile(defaults, row, it, defaultDest, defaultCircuit, defaultSuffix, filename, lineNo);
 					if (result == RESULT_OK)
 						continue;
 				} else
@@ -173,12 +174,13 @@ public:
 	 * @param begin an iterator to the first column of the default row to read (for error reporting).
 	 * @param defaultDest the valid destination address extracted from the file name (from ZZ part), or empty.
 	 * @param defaultCircuit the valid circuit name extracted from the file name (from IDENT part), or empty.
+	 * @param defaultSuffix the valid circuit name suffix (starting with a ".") extracted from the file name (number after after IDENT part and "."), or empty.
 	 * @param filename the name of the file being read.
 	 * @param lineNo the current line number in the file being read.
 	 * @return @a RESULT_OK on success, or an error code.
 	 */
 	virtual result_t addDefaultFromFile(vector< vector<string> >& defaults, vector<string>& row,
-			vector<string>::iterator& begin, string defaultDest, string defaultCircuit,
+			vector<string>::iterator& begin, string defaultDest, string defaultCircuit, string defaultSuffix,
 			const string& filename, unsigned int lineNo)
 	{
 		defaults.push_back(row);
diff --git a/src/lib/ebus/message.cpp b/src/lib/ebus/message.cpp
index 4287a52d..36660f28 100644
--- a/src/lib/ebus/message.cpp
+++ b/src/lib/ebus/message.cpp
@@ -888,7 +888,7 @@ result_t MessageMap::add(Message* message, bool storeByName)
 }
 
 result_t MessageMap::addDefaultFromFile(vector< vector<string> >& defaults, vector<string>& row,
-	vector<string>::iterator& begin, string defaultDest, string defaultCircuit,
+	vector<string>::iterator& begin, string defaultDest, string defaultCircuit, string defaultSuffix,
 	const string& filename, unsigned int lineNo)
 {
 	// check for condition in defaults
@@ -903,7 +903,7 @@ result_t MessageMap::addDefaultFromFile(vector< vector<string> >& defaults, vect
 			return RESULT_ERR_DUPLICATE_NAME;
 		}
 		SimpleCondition* condition = NULL;
-		result_t result = Condition::create(type, ++begin, row.end(), defaultDest, defaultCircuit, condition);
+		result_t result = Condition::create(type, ++begin, row.end(), defaultDest, defaultCircuit+defaultSuffix, condition);
 		if (condition==NULL || result!=RESULT_OK) {
 			m_lastError = "invalid condition";
 			return result;
@@ -913,13 +913,20 @@ result_t MessageMap::addDefaultFromFile(vector< vector<string> >& defaults, vect
 	}
 	if (row.size()>1 && defaultCircuit.length()>0) {
 		if (row[1].length()==0)
-			row[1] = defaultCircuit; // set default circuit
+			row[1] = defaultCircuit+defaultSuffix; // set default circuit and suffix: "circuit[.suffix]"
 		else if (row[1][0]=='#')
-			row[1] = defaultCircuit+row[1]; // append security suffix to circuit prefix
+			row[1] = defaultCircuit+defaultSuffix+row[1]; // move security suffix behind default circuit and suffix: "circuit[.suffix]#security"
+		else if (defaultSuffix.length()>0 && row[1].find_last_of('.')==string::npos) { // circuit suffix not yet present
+			size_t pos = row[1].find_first_of('#');
+			if (pos==string::npos)
+				row[1] += defaultSuffix; // append default suffix: "circuit.suffix"
+			else
+				row[1] = row[1].substr(0, pos)+defaultSuffix+row[1].substr(pos); // insert default suffix: "circuit.suffix#security"
+		}
 	}
 	if (row.size()>5 && defaultDest.length()>0 && row[5].length()==0)
 		row[5] = defaultDest; // set default destination
-	return FileReader::addDefaultFromFile(defaults, row, begin, defaultDest, defaultCircuit, filename, lineNo);
+	return FileReader::addDefaultFromFile(defaults, row, begin, defaultDest, defaultCircuit, defaultSuffix, filename, lineNo);
 }
 
 result_t MessageMap::readConditions(string& types, const string& filename, Condition*& condition)
diff --git a/src/lib/ebus/message.h b/src/lib/ebus/message.h
index a590293b..5d3816eb 100644
--- a/src/lib/ebus/message.h
+++ b/src/lib/ebus/message.h
@@ -677,7 +677,7 @@ public:
 
 	// @copydoc
 	virtual result_t addDefaultFromFile(vector< vector<string> >& defaults, vector<string>& row,
-		vector<string>::iterator& begin, string defaultDest, string defaultCircuit,
+		vector<string>::iterator& begin, string defaultDest, string defaultCircuit, string defaultSuffix,
 		const string& filename, unsigned int lineNo);
 
 	/**