code: private Connector findSipConnector(String ipAddress, int port,
  			String transport) {
  		Connector connectorToRemove = null;
  		for (Connector connector : connectors) {
  			final ProtocolHandler protocolHandler = connector.getProtocolHandler();
  			if(protocolHandler instanceof SipProtocolHandler) {
  				final SipProtocolHandler sipProtocolHandler = (SipProtocolHandler) protocolHandler;
  				if(sipProtocolHandler.getIpAddress().equals(ipAddress) && sipProtocolHandler.getPort() == port && sipProtocolHandler.getSignalingTransport().equalsIgnoreCase(transport)) {
  //					connector.destroy();
  					connectorToRemove = connector;
  					break;
  				}
  			}
  		}
  		return connectorToRemove;
  	}
docs: Find a sip Connector by it's ip address, port and transport
  @param ipAddress ip address of the connector to find
  @param port port of the connector to find
  @param transport transport of the connector to find
  @return the found sip connector or null if noting found