BT Senior Network Designer – IP Voice Core in Ipswich, United Kingdom

Job title: Senior Network Designer – IP Voice Core


Adastral Park - Ipswich


£35,360 - £53,040

10% on Target Bonus / Contributory Pension / 25 Days Holiday / Employee Broadband & TV Package

Key purpose of role:

The role exists within BT’s Session Distribution and Interworking Network (SDIN), which provides the core IP Voice routing and interworking for all BT’s current and strategic, fixed and mobile voice platforms.

The Senior Network Designer – IP Voice Core is responsible for contributing to the production of E2E designs and configuration of platform components. The functional elements of the platform are:

  • Genband Quantix Session Border Controller (SBC)

  • Genband C3 Media Gateway Controller (MGC)

  • Genband G9/ M5 Media Gateway (MGW)

The role holder is also responsible for providing technical input on early stages of new requirements specification, technical support throughout the platform lifecycle, in-life performance of the call control components, assistance with resolution of live incidents involving design issues, and assistance with definition of operational processes

The Senior Network Designer – IP Voice Core has significant technical domain knowledge and skills/experience and uses them in delivery of designs and business solutions.

BT is looking for an individual who wants to develop into an industry wide expert in IP Voice technologies.

Key responsibilities:

  • Develop and agree design scope for known network design activities.

  • Develop and recommend design scope for more complex and/or new network design activities.

  • Set up network models for design testing.

  • Produce standardised designs in a range of areas including core and customer specific network design.

  • Provide design support and information down streaming on their feature and/or component design to more senior network designers or testing team, systems team.

  • Collaborate with more senior network engineers to resolve implementation issues, with suppliers and other designers Provide technical guidance to more junior network designers.

  • Document and deliver training and coaching of less experienced team members.

  • Identify opportunities to follow design best practice.

Key decisions made by this role:

  • Decide on design and/or design testing scope of a network feature and/or component for known network design activities.

  • Decide on design and/or design testing scope of a network feature and/or component for unknown network design activities.

  • Decide on network model for design testing.

  • Decide on the network design for network platforms and/or customer solutions.

Problem Solving:

  • Solve problems typically specific to components across the network platform and/or customer solution.

  • Solve problems that are a mix of both concrete and known, and more complex and unknown problem scenarios. Most complex problems will be typically related to a network component or multiple network components.

  • Deal with most problems independently although may require technical guidance as appropriate.

Required Experience:

  • Expertise in the Genband C3 Media Gateway Controller (or equivalent)

  • Expertise in the Genband G9 Media Gateway (or equivalent)

  • Expertise in the Genband Quantix SBC (or equivalent)

  • Expertise in the SIP protocol

  • Good working knowledge of ISUP and BICC protocols

  • Good working knowledge of IP protocols

  • Working knowledge of the UK PSTN

  • Design Validation for Performance

  • Design and capacity delivery, process improvement, including automation

Five Key Skills must be evidenced in the CV:

  • A proven track record in network design, ideally with voice and or IP networks.

  • Knowledge and experience in SIP and or ISUP protocols.

  • Knowledge of IP Voice interconnect services, such as BT’s IP Exchange product.

  • Expertise in the design of SBC, MGC and MGW technology (esp. Genband).

  • A deep interest in networks and a willingness to learn and keep digging deeper into the technology.

At BT, we’re creating an inclusive working environment where people from all backgrounds can succeed. Diversity makes sense for us, for our customers and for our future.

We value different perspectives, skills and experiences. We’re happy to consider ways of working that will mean you can perform at your best. If you want to talk about working part-time or as a job share in this role, please apply and we’ll do our best to get the balance right.

Job: IT, Systems and Security

Title: Senior Network Designer – IP Voice Core

Location: GBR %26 Ireland-GBR-Suffolk-Ipswich

Requisition ID: 71066