The Corporate Information Technology Services (TCIS) department of the African Development Bank is actively seeking information regarding a consultancy for the development of a customized Session Border Controller (SBC) and voice gateways management solution. The consultancy should encompass advice on a comprehensive management dashboard, the ability to monitor and manage firmware version statuses, capabilities for firmware upgrades, and the provision of SIP trunk statuses. The objective of this Request for Expressions of Interest (REOI) is to meticulously gather extensive details about potential solutions and to identify potential vendors in the market who can provide such a solution. The Bank is interested in understanding the capabilities, features, and benefits of different solutions, as well as the experience, expertise, and capabilities of potential vendors in delivering such solutions.