@article{423240,
      author = {Robar, Alex.},
      url = {http://library.usi.edu/record/423240},
      title = {FreePBX 2.5 powerful telephony solutions configure,  deploy, and maintain an enterprise-class VoIP PBX /  [electronic resource] :},
      publisher = {Packt Publishing,},
      recid = {423240},
      pages = {v, 277 p. :},
      address = {Birmingham, UK :},
      year = {2009},
}