Stephan Bieri Email & Phone Number

Technical Expertise;Responsible for VoIP tracing and monitoring at Swisscom.Responsible for VoIP Aggregation WirelineResponsible for VoIP TappingDeep knowledge: OCOM (Palladion), Netscout, ANUE (IXIA), Network Critical, Allegro Packets, vTAPs, Cubro Deep knowledge of SIP, SS7 and SDPAnalyzing E2E IMS signaling traces(wireshark, cloudshark.. )Good understanding of 3GPP protocols (IPSec, ISUP, SIGTRAN, TCP/IP,DIAMETER, MEGACO and DNS)Different brand of voice platforms/equipments experience(Ericsson, Genband, Acme, AudicodesConfident in the operation of Linux systemsMCSA/MCSEExpert at MS Excelcomptia network+Business Expertise: Procurement and ordering tracing infrastructure.Maintenance contracts with suppliersAccomplishments:Gained experience on wholesale,retail,B2B,vendor sides of voice businessWorked on technical, business and hybrid rolesWorked closely with core voice, network ,commercial, rating, assurance teams of operators.Identified & developed variety of fraud handling mechanismsDeveloped variety of commercial models to improve revenues or minimize costs/fraud threats