The promotion for the web-hosting plans may have been so successful that you decide to try including a similar discount option for your broad-band access plans. Since the ‘Once off discount type’ of service data has already been defined, all you need to do now is attach this service-data type to the broadband plan in question. Once you have attached this data-type to the plan-type, you will be able to give values for this data-type to any users who are on the broad-band plan.