This paper describes the implementation of order-wire functionality in NG-SDH devices ODS2G5 and OTS622 IRITEL.The paper also describes biomat for sale the operation of order-wire in networks with arbitrary topologies, as well as the configuration of order-wire functionality by using network management software SUNCE.The presented solution for order-wire functionality is compared with VoIP solutions.The paper shows that the presented orange zinger tomato solution provides fast reaction to network failures, while keeping the implementation simple.