UNIPER - Independent Consultants in Telecommunications & IT Have specialist knowledge and vast experience of establishing processes with related organisation, procedures and systems within the following areas: Prepay Services Online charging based on Diameter Credit-Control Application (DCCA), e.g. Gy for PS Data, or on IN technology. Top up methods, IVR prompts and notifications. Requirements and acceptance tests. Service deployment and market launch. Billing Collections Roaming Mediation Customer Management Revenue Assurance Outsourcing Network Extension Network Upgrade O&M Product Management Service Development Service Deployment Procurement/Purchase Suppliers & Contracts