diff --git a/ipaacalib/python/src/ipaaca/__init__.py b/ipaacalib/python/src/ipaaca/__init__.py
index 998fe65f7e0237293b8ef54e621c98165372b02f..9314caf9604777bf727e86235693b3c0670275f1 100755
--- a/ipaacalib/python/src/ipaaca/__init__.py
+++ b/ipaacalib/python/src/ipaaca/__init__.py
@@ -4,7 +4,7 @@
 #  "Incremental Processing Architecture
 #   for Artificial Conversational Agents".
 #
-# Copyright (c) 2009-2014 Social Cognitive Systems Group
+# Copyright (c) 2009-2016 Social Cognitive Systems Group
 #                         CITEC, Bielefeld University
 #
 # http://opensource.cit-ec.de/projects/ipaaca/
@@ -32,6 +32,7 @@
 
 from __future__ import division, print_function
 
+import os
 import threading
 
 import rsb
@@ -51,7 +52,13 @@ __RSB_INITIALIZED = False
 
 
 def initialize_ipaaca_rsb_if_needed():
-	'''Register own RSB Converters and initialise RSB from default config file.'''
+	"""Initialise rsb if not yet initialise.
+
+	   * Register own RSB onverters.
+	   * Initialise RSB from enviroment variables, rsb config file, or
+	     from default values for RSB spread host and port (via
+	     ipaaca.defaults or ipaaca.misc.IpaacaArgumentParser).
+	"""
 	global __RSB_INITIALIZED
 	with __RSB_INITIALIZER_LOCK:
 		if __RSB_INITIALIZED:
@@ -93,7 +100,16 @@ def initialize_ipaaca_rsb_if_needed():
 			rsb.converter.registerGlobalConverter(
 				rsb.converter.ProtocolBufferConverter(
 					messageClass=ipaaca_pb2.IURetraction))
-		
-			rsb.__defaultParticipantConfig = rsb.ParticipantConfig.fromDefaultSources()
+
+			if ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREAD_HOST is not None:
+				os.environ['RSB_TRANSPORT_SPREAD_HOST'] = str(
+						ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREAD_HOST)
+
+			if ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREAD_PORT is not None:
+				os.environ['RSB_TRANSPORT_SPREAD_PORT'] = str(
+						ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREAD_PORT)
+
+			rsb.__defaultParticipantConfig = \
+					rsb.ParticipantConfig.fromDefaultSources()
 
 			__RSB_INITIALIZED = True
diff --git a/ipaacalib/python/src/ipaaca/defaults.py b/ipaacalib/python/src/ipaaca/defaults.py
index 706c714b1d270838f04a84f3cd20dffe432d747c..bf3d0f00d282a90f0c908ecf92f17f7447020b45 100644
--- a/ipaacalib/python/src/ipaaca/defaults.py
+++ b/ipaacalib/python/src/ipaaca/defaults.py
@@ -4,7 +4,7 @@
 #  "Incremental Processing Architecture
 #   for Artificial Conversational Agents".
 #
-# Copyright (c) 2009-2014 Social Cognitive Systems Group
+# Copyright (c) 2009-2016 Social Cognitive Systems Group
 #                         CITEC, Bielefeld University
 #
 # http://opensource.cit-ec.de/projects/ipaaca/
@@ -33,6 +33,11 @@
 IPAACA_DEFAULT_CHANNEL = 'default'
 
 IPAACA_LOGGER_NAME = 'ipaaca'
+
 IPAACA_DEFAULT_LOGGING_LEVEL = 'WARNING'
 
 IPAACA_DEFAULT_IU_PAYLOAD_TYPE = 'JSON' # one of ipaaca.iu.IUPayloadType
+
+IPAACA_DEFAULT_RSB_SPREAD_HOST = None
+
+IPAACA_DEFAULT_RSB_SPREAD_PORT = None
diff --git a/ipaacalib/python/src/ipaaca/misc.py b/ipaacalib/python/src/ipaaca/misc.py
index 44932d5f47442df1b4ce44c5399a31433a374431..b3bec913534df397dcb44124c9ff23354b0cf04d 100644
--- a/ipaacalib/python/src/ipaaca/misc.py
+++ b/ipaacalib/python/src/ipaaca/misc.py
@@ -4,7 +4,7 @@
 #  "Incremental Processing Architecture
 #   for Artificial Conversational Agents".
 #
-# Copyright (c) 2009-2014 Social Cognitive Systems Group
+# Copyright (c) 2009-2016 Social Cognitive Systems Group
 #                         CITEC, Bielefeld University
 #
 # http://opensource.cit-ec.de/projects/ipaaca/
@@ -124,6 +124,16 @@ class IpaacaArgumentParser(argparse.ArgumentParser):
 			rsb_logger.removeHandler(__GENERIC_NO_LOG_HANDLER)
 			rsb_logger.setLevel(level=values)
 
+	class IpaacaRSBSpreadHost(argparse.Action):
+
+		def __call__(self, parser, namespace, values, option_string=None):
+			ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREAD_HOST = values
+
+	class IpaacaRSBSpreadPort(argparse.Action):
+
+		def __call__(self, parser, namespace, values, option_string=None):
+			ipaaca.defaults.IPAACA_DEFAULT_RSB_SPREADPORT = values
+
 	def __init__(self, prog=None, usage=None, description=None, epilog=None,
 			parents=[], formatter_class=argparse.HelpFormatter,
 			prefix_chars='-', fromfile_prefix_chars=None, 
@@ -136,6 +146,7 @@ class IpaacaArgumentParser(argparse.ArgumentParser):
 			conflict_handler=conflict_handler, add_help=add_help)
 
 	def _add_ipaaca_lib_arguments(self):
+		# CMD-arguments for ipaaca
 		ipaacalib_group = self.add_argument_group('IPAACA library arguments')
 		ipaacalib_group.add_argument(
 			'--ipaaca-payload-type', 
@@ -157,6 +168,7 @@ class IpaacaArgumentParser(argparse.ArgumentParser):
 			choices=['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG'],
 			dest='_ipaaca_logging_level_',
 			help="enable IPAACA logging with threshold")
+		# CMD-arguments for rsb
 		rsblib_group = self.add_argument_group('RSB library arguments')
 		rsblib_group.add_argument(
 			'--rsb-enable-logging', 
@@ -164,6 +176,20 @@ class IpaacaArgumentParser(argparse.ArgumentParser):
 			choices=['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG'],
 			dest='_ipaaca_rsb_enable_logging_',
 			help="enable RSB logging with threshold")
+		rsblib_group.add_argument(
+			'--rsb-spread-host', 
+			action=self.IpaacaRSBSpreadHost,
+			default=None,
+			dest='_ipaaca_rsb_set_spread_host_',
+			metavar='HOST',
+			help="set RSB spread host")
+		rsblib_group.add_argument(
+			'--rsb-spread-port', 
+			action=self.IpaacaRSBSpreadPort,
+			default=None,
+			dest='_ipaaca_rsb_set_spread_port_',
+			metavar='PORT',
+			help="set RSB spread port")
 
 	def parse_args(self, args=None, namespace=None):
 		self._add_ipaaca_lib_arguments() # Add ipaaca-args just before parsing