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Deutsche Telekom AG - Interim Group report - January 1 to September 30, 2011

82 Visitor. Visitors are customers of international mobile communications net- work operators who use voice or data services in a mobile network operated by a company of the Deutsche Telekom Group. The call or the transmitted data is routed via the network of the national company in question and terminated in another mobile or fixed network in the same or another country, or in the national company’s own network (see also Roaming). VoIP – Voice over Internet Protocol. Technology used to make telephone calls via the Internet. Three methods are available: PC to PC, PC to fixed-network lines, and telephone calls via IP-based internal networks. Wholesale. The business of selling services to third parties who in turn sell them to their own end customers either directly or after further processing (see also Resale). Wholesale bundled lines (IP-Bitstream Access (IP-BSA)). Wholesale product for which Deutsche Telekom leases DSL lines to the competitor and transports the datastream via its concentrator network to the associated broadband point of presence (PoP) where the datastream is handed over to the competitor. In contrast to voluntary DSL resale, IP-BSA is a wholesale service required by the regulatory authority. This product is available in conjunction with a Deutsche Telekom PSTN line or as a DSL stand-alone variant (please refer to Wholesale unbundled lines). The totals reported in the interim Group management report were calculated on the basis of precise figures and rounded to millions. Per- centages were calculated on the basis of the figures shown. Wholesale unbundled lines (e.g., IP-BSA Stand Alone (IP-BSA SA)). Wholesale product not bundled with a Deutsche Telekom PSTN line, which allows competitors to offer an all-IP product range to end-customers. The totals reported in the interim Group management report were calculated on the basis of precise figures and rounded to millions. Percentages were calculated on the basis of the figures shown. WLAN – Wireless Local Area Network. Wireless networks for mobile Internet access. The network can also connect multiple computers to each other or to a central information system, a printer, or a scanner (often referred to as WiFi).