code: protected void computeOutboundInterfaces() {
  		if(logger.isDebugEnabled()) {
  			logger.debug("Outbound Interface List : ");
  		}
  		List<SipURI> newlyComputedOutboundInterfaces = new CopyOnWriteArrayList<SipURI>();
  		Set<String> newlyComputedOutboundInterfacesIpAddresses = new CopyOnWriteArraySet<String>();
  		Iterator<MobicentsExtendedListeningPoint> it = getExtendedListeningPoints();
  		while (it.hasNext()) {
  			MobicentsExtendedListeningPoint extendedListeningPoint = it
  					.next();
  									
  			for(String ipAddress : extendedListeningPoint.getIpAddresses()) {
  				try {
  					newlyComputedOutboundInterfacesIpAddresses.add(ipAddress);
  					javax.sip.address.SipURI jainSipURI = SipFactoryImpl.addressFactory.createSipURI(
  							null, ipAddress);
  					jainSipURI.setPort(extendedListeningPoint.getPort());
  					jainSipURI.setTransportParam(extendedListeningPoint.getTransport());
  					SipURI sipURI = new SipURIImpl(jainSipURI, ModifiableRule.NotModifiable);
  					newlyComputedOutboundInterfaces.add(sipURI);
  					if(logger.isDebugEnabled()) {
  						logger.debug("Outbound Interface : " + jainSipURI);
  					}
  				} catch (ParseException e) {
  					logger.error("cannot add the following listening point " +
  							ipAddress + ":" +
  							extendedListeningPoint.getPort() + ";transport=" +
  							extendedListeningPoint.getTransport() + " to the outbound interfaces", e);
  				}
  			}
  		}				
  
                  outboundInterfaces  = newlyComputedOutboundInterfaces;		
                  outboundInterfacesIpAddresses  = newlyComputedOutboundInterfacesIpAddresses;
  
  		
  	}
docs: Compute all the outbound interfaces for this manager