PART I Charges for our HiNet dial-up service include a monthly fee entitling the customer to a fixed number  of minutes of service, with an additional charge per minute when the fixed number of minutes is exceeded.  Alternatively, we offer our customers an unlimited number of minutes for a fixed monthly fee. Charges for our  ADSL and FTTx services include one-time installation charges and monthly subscription fees. These charges for  our ADSL and FTTX services vary based on connection speed.  The following table sets forth our average revenue per user for each of the periods indicated.  The decline of our ADSL average revenue per user over the last three years was due to the National  Communications Commission mandated tariff reduction and the decline of FTTx average revenue per user  was due to the promotional packages and discounts provided for existing customers. However, we expect our  average revenue per user for broadband services to remain stable going forward as many customers will continue  to migrate towards more expensive and higher speed FTTx services which will offset the declining average  revenue per user of ADSL and FTTx themselves. For more details of the National Communications Commission  mandated tariff reduction, please see “Item 5. Operating and Financial Review and Prospects—Overview—Tariff  Adjustments”.  We are the leading provider of domestic leased line services in Taiwan. Leased line services involve  offering exclusive lines that allow point-to-point connection for voice and data traffic. Leased lines are used  by business customers to assemble their own private networks and by telecommunications service providers to  establish networks to offer telecommunications services.  We provide data transmission services to major corporate customers in Taiwan. We also provide leased  lines to other mobile and fixed line service operators for interconnection with our fixed line network and for  connection within their networks.  The following table shows the bandwidth of local and domestic long distance lines leased to third parties as  of each of the dates indicated.  29 Leased Line Services—Local and Domestic Long Distance  (1) Average revenue per user for HiNet dial-up services per month is calculated by dividing the sum of local  telephone usage revenues generated by HiNet dial-up subscribers and internet access revenues by the  average of the number of our HiNet dial-up subscribers on the first and last days of the period and dividing  the result by the number of months in the relevant period.  (2) Average revenue per user for ADSL service services per month is calculated as the sum of (a) ADSL access  revenues for the relevant period divided by the average of the number of our ADSL customers on the first  and last days of the period divided by the number of months in the relevant period and (b) HiNet ADSL  service revenues divided by the average of the number of HiNet ADSL subscribers on the first and last days  of the period divided by the number of months in the relevant period.  (3) Average revenue per user for FTTx service services per month is calculated as the sum of (a) FTTx access  revenues for the relevant period divided by the average of the number of our FTTx service customers on the  first and last days of the period divided by the number of months in the relevant period and (b) HiNet FTTx  internet service provider revenues divided by the average of the number of HiNet FTTx subscribers on the  first and last days of the period divided by the number of months in the relevant period.  Year ended December 31, 2008 2009 2010 NT$ NT$ NT$ Average revenue per user for HiNet dial-up services per month (1) 33  24  17  Average revenue per user for ADSL services per month (2) 701  638  598  Average revenue per user for FTTx services per month (3) 1,085  1,022  1,019 