code: @Override
  	public List<Connector> getSipConnectors() {
  		List<Connector> connectors = new ArrayList<Connector>();
  		
  		Connector[] conns = service.findConnectors();
  		
  		for (Connector conn : conns) {
  			if (conn.getProtocolHandler() instanceof SipProtocolHandler){
  				connectors.add(conn);
  			}
  		}
  		
  		return connectors;
  	}
docs: Return the SipConnectors