The presentation will describe a case study of usage of JBoss in developing an application solution for the management of PDH, SDH and ATM transport networks. The benefits of choosing a J2EE AS are introduced, including: Facilitates support for integration of legacy components of the NetViewer Suite, therefore allowing to migrate one component at a time, rather than abruptly discarding everything and restarting from scratch; Facilitates implementation of chosen data model (TMF 814); Facilitates implementation of the northbound interfaces SNMP, CORBA, OSSJ/XML/SOAP. Why JBoss is the preferred J2EE AS for this project: technical problems faced with other J2EE application servers are described, ranging from bugs to integration issues; the absence of faults and the very good performance of Jboss are described; the economic advantages.