The bit access service allows the incumbent operator to retain control over the rate of delivery of broadband access services and the geographic regions in which these services are introduced. From a regulatory point of view, these services are therefore seen as complements to other unbundled forms of access without replacing them. The main elements that define access to binary stream are: the incumbent operator can also offer transmission services to its competitors using its asynchronous transmission mode (ATM) or IP network to transfer competitors` traffic from the digital access multiplexer to the subscriber network (DSLAM) to a higher level in the network hierarchy, where new entrants may already have a point of view (for example). B a transit switch). Bit flow transfer points can therefore be found at different levels: binary stream access refers to the situation in which an established instigator installs a broadband connection to the customer`s premises (for example. B by installing ADSL devices on the local access network) and then making this connection available to third parties so that they can offer high-speed services to customers. This type of access does not include third-party access to the copper pair in the local loop.  As a result, bitumen access is a wholesale product consisting of access services (usually ADSL) and basic (ATM) network (data) backhaul services. Access to the network is now seen as a key tool for opening up competition in the broadband market. It allows competitors to offer their own products to their consumers, even if they do not operate the local loop (the last kilometer). Internet access allows the new entrant to use high-speed modems and other equipment provided by the incumbent operator, thus avoiding maintenance and investment in the local loop. This affects the profitability of the service and limits the type of modems that the new entrant`s customer can buy or rent.
Unlike unbundling access, the provision of bandwidth access services is not compulsory under EU law, but where a incumbent operator makes DSL bitstream services available to its own services, subsidiaries or third parties, it must also, in accordance with EU law, provide others with transparent and non-discriminatory forms of access on transparent and non-discriminatory terms (Article 16 of Directive 98/10/EC).