I Wants to build a telephone billing system which will be connected to the web for customers to be able to control and view there account.
packages expertise needed:: drupal, asterisk and Astbill. if u are not familiar with any one of them, plz dont bid. Only serious queries plz. I need it done within 30 days. More details via pmb.
22 freelancers estão ofertando em média $3479 para esse trabalho
i have experience of working wid asterisk,drupal, GNU GK,PSTN gateway and Radius Servers..I have already developed billing system for GNU GK for customers to view and related functions...