AAPT operates a large national voice and data telecommunications network via a national high-bandwidth fibre optic backbone over a combination of AAPT and Optus networks. The backbone links 63 PoPs located in state capitals and regional centres, providing coverage to 98% of Australians. AAPT interconnects with Telstra in 66 major exchanges to supplement its backbone infrastructure and for last-mile access to customers. In major cities and metropolitan areas AAPT delivers fibre optic cable to 1145 buildings of high-volume customers, broadband wireless LMDS to corporate and government users and DSL to SMEs. In October 2007 AAPT launched a new ADSL2+ broadband service with access speeds of up to 20Mb/s. By June 2008, AAPT had an installed base of 150 DSLAMs nationally, in conjunction with PowerTel’s network.