HiNet has constructed 35 POPs in its service area covering Taiwan , Penghu, Kinmen and Matsu . HiNet uses two STM-64 rings in its network to connect the three main metropolitan POPs located in Taipei , Taichung , and Kaohsiung . In addition, the high speed links between main metropolitan POPs and other POPs are all constructed with dual homing structure. The total bandwidth of HiNet backbone is 159.6Gbps (August 2004).