IMS meta switch engineer

1. Engagement Overview 

Enet is undertaking a comprehensive Core Network transformation and operational stabilization program covering Transport, Core, and Voice/IMS platforms. As part of this program, Enet requires an experienced MetaSwitch Subject Matter Expert to be deployed onsite for a period of 4 to 6 months. The consultant will work closely with Enet's NOC, Core Network, and Business teams to review, optimize, troubleshoot, and support the MetaSwitch-based voice and softswitch infrastructure, while contributing to the broader network architecture and OSS integration initiatives currently underway (including redundancy testing, DC-DR validation, and Operations automation ). 

2. Purpose of the Role 

The MetaSwitch Expert will provide hands-on technical expertise on MetaSwitch platforms (Call Feature Server, Session Border Controller, Media Gateway Controller, Perimeta SBC, and related VoIP/IMS components) to: 

• Ensure stable, reliable, and optimized operation of the existing MetaSwitch voice infrastructure. 

• Support call flow design, validation, and troubleshooting across Transport and Core network domains. 

• Assist in redundancy and failover testing for voice-related applications (AAA, DNS, DHCP, Call Control) across DC and DR sites. 

• Provide architecture-level guidance for integrating MetaSwitch systems with the proposed OSS platform. 

• Support migration planning and MOP development for upcoming Huawei equipment deployment. 

3. Key Responsibilities 

• Perform detailed review and assessment of the existing MetaSwitch deployment (CFS, MGC, SBC/Perimeta, Session Border Controllers) and produce as-built documentation. 

• Design, validate, and document end-to-end call flows for voice and signaling services across the network. 

• Provide technical leadership in troubleshooting complex voice/signaling issues (SIP, SIP-I, ISUP, MGCP/H.248) across Core and Transport layers. 

• Support DC-DR redundancy assessment and execute failover/redundancy testing for MetaSwitch and associated network applications (AAA, DNS, DHCP). 

• Collaborate with the Firewall/Security team to validate firewall architecture and scope as it pertains to MetaSwitch signaling and media traffic. 

• Work with the Transport/Core team on integration and interoperability between MetaSwitch platforms and Huawei Transport/Core equipment. 

• Participate in technical discussions with Enet NOC, Business, Call Centre, and other stakeholders to define OSS integration. 

• Assist in preparing the Method of Procedure (MOP) and migration/cutover plan for new equipment deployment, minimizing service impact. 

• Provide day-to-day operational support and act as an escalation point for MetaSwitch-related incidents raised by the NOC. 

• Deliver knowledge transfer (KT) sessions and mentor Enet's internal NOC and Core Network engineers on MetaSwitch operations and best practices. 

• Maintain accurate technical documentation, configuration records, and change logs throughout the engagement. 

• Ensure adherence to Enet's change management, security, and network operations policies. 

4. Required Skills & Technical Expertise 

• Minimum 6–10 years of hands-on experience in Core Voice Network / IMS with at least 4–5 years of direct MetaSwitch platform experience. 

• Strong expertise in MetaSwitch product suite: Call Feature Server (CFS), Media Gateway Controller (MGC), Perimeta Session Border Controller, MetaView / MetaSphere EAS, and related management systems. 

• In-depth knowledge of signaling protocols: SIP, SIP-I, SIP-T, ISUP, MGCP, H.248/Megaco, and SS7 fundamentals. 

• Proven experience in call flow design, analysis, and troubleshooting for fixed, mobile, and interconnect voice services. 

• Understanding of Transport and Core network architecture (MPLS, IP/MPLS, routing/switching fundamentals) and how voice platforms interconnect with these layers. 

• Experience with DC-DR architecture, redundancy design, and failover testing methodologies. 

• Working knowledge of network security and firewall concepts as applied to voice/signaling traffic. 

• Exposure to OSS/BSS platforms and integration concepts; prior exposure to Rakuten Symphony or similar cloud-native OSS platforms is an added advantage. 

• Familiarity with Huawei Transport and Core equipment is desirable, given ongoing vendor integration. 

• Experience preparing MOPs, migration plans, and cutover documentation for telecom network deployments. 

• Strong analytical and troubleshooting skills with the ability to work under operational (live network) constraints. 

5. Desirable / Preferred Qualifications 

• Bachelor's degree in Telecommunications, Electronics, Computer Engineering, or a related field. 

• MetaSwitch vendor certification(s) or equivalent vendor training. 

• Prior experience in a telecom operator or ISP environment in a similar onsite consulting/SME role. 

• ITIL Foundation certification or exposure to structured NOC/incident management processes. 

• Experience working alongside multi-vendor teams in a live production network. 

6. Engagement Details 

• Duration: 4 to 6 months, onsite at Enet, with possible extension based on project requirements. 

• Reporting: Direct reporting to Enet's CTO. 

• Deliverables: As-built documentation, call flow diagrams, redundancy test reports, MOP/migration plan, OSS integration inputs, and periodic progress summaries. 

• Location: Onsite at Enet facilities, with availability for NOC/DC-DR site visits as required.