Join our TeamAbout this opportunity Ericsson is seeking a highly skilled MS Core Cloud Specialist – Fixed Voice to join our team in Sydney, NSW.
This senior role requires deep expertise in Ribbon and GENBAND voice switching platforms to support and evolve Fixed Voice network infrastructure across Australian Data Centers.What you will doOperate and maintain Ribbon/GENBAND Fixed Voice nodes (DMS100, CS****/CS2K, C20 and sub-elements) across Sydney-based and national Data CentersPerform fault management, incident resolution, and root-cause analysis for voice platform outagesExecute software upgrades, patch management, and planned maintenance on GENBAND/Ribbon platformsConfigure and manage C20 elements: GWC, CCA, USP/SP2K, AMS, MAS, NGSS/SST, SSL/SESM/A2, CS-LAN, CBM, CMT/IEMT, IEMS, RTP MP EM, PMDM, MG3.5K, MG15K, NDM, TNSIMonitor network KPIs using Grafana and Kalix; resolve degradations proactivelyManage SBC provisioning, SIP trunking, and policy rules via Ribbon NMSDevelop and review MOPs for change management and maintenance windowsCollaborate with IMS, PS CORE, and NOC teams on cross-domain incidentsProvide Level 3 support and escalation management with Ribbon/GENBAND vendor TACMaintain accurate network documentation and knowledge-base articlesEducation and experienceEducation: Bachelor's in Telecom, Electronics, Computer Science or equivalentExperience: 15+ years Wireline/Fixed Voice — hands‐on experience on Ribbon or GENBAND platformsMandatory technical skillsDeep expertise in DMS100, CS**** (CS2K),



and C20 platform elementsStrong operational knowledge of Ribbon/GENBAND Fixed Voice architectures and SBC platformsTool knowledgeGrafanaKalixRibbon NMSServiceNow / ITSMUnix / Linux CLIProtocol and technology knowledgeSIP (RFC ****)H.248 / MEGACOSS7 / ISUPSIGTRANTDM E1 / T1 / PRIRTP / RTCPG.711 / G.729DTMF RFC ****LNP / ENUMIPv4 / IPv6Node types and platformsRibbon / Nortel – DMS100: Class 5 wireline switch — operation, provisioning, fault resolutionGENBAND / Ribbon – CS**** (CS2K): Softswitch — call control, trunk management, signalling configurationGENBAND / Ribbon – C20 Softswitch: GWC, CCA, USP/SP2K, AMS, MAS, NGSS/SST, SSL/SESM/A2, CS-LAN, CBM, CMT/IEMT, IEMS, RTP MP EM, PMDM, MG3.5K, MG15K, NDM, TNSIRibbon – SBC: Session Border Controller — SIP trunking, media policy, SIP/TDM interworkingAdditional advantages and requirementsAdded advantage: Good understanding of network KPIs (call completion rate, ASR, NER, MOS) for Fixed Voice, with ability to interpret and act on KPI degradation trendsCertifications: Ribbon/GENBAND certifications and CCNA/CCNP Voice (preferred)Right to Work: Full right to work in Australia; Sydney-based or relocatingWhy join Ericsson?
At Ericsson, you'll have an outstanding opportunity.
The chance to use your skills and imagination to push the boundaries of what's possible.
To build solutions never seen before to some of the world's toughest problems.
You'll be challenged, but you won't be alone.
You'll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do.
We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth.
We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team.
Ericsson is proud to be an Equal Prospect Employer.
learn more.Primary country and city: Australia (AU) || Sydney
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📌 Ms Core Cloud Specialist Fixed Voice (New South Wales)
🏢 Ericsson
📍 New South Wales