The system is usable by end-user, with little or no impact to the function of the system. Enhancement to the Software is proposed by Client based on a detailed requirement to be validated by Phonexia and included into Phonexia’s Software roadmap after Phonexia’s acceptance. Client shall test internally whether the Minor Issue is present also in the latest possible Software Update, regardless Software version used by the customer. A Minor Issue is generally fixed within a Software Update. When a Minor Issue is fixed within a Software Upgrade, the Software Upgrade is provided under the Maintenance & Support services at no additional fee.