Appia's Co-Founder and VP of Legacy Systems, Bill Bollinger, discusses his tips for IT Departments on SIP Security. As someone who's been around VoIP for as long as anyone and who's company has thousands of SIP hack attempts everyday, Bill knows his stuff and has some simple yet great tips when it comes to how to choose a secure SIP provider, how to set up your credentials in a way that reduces risk and what to do if you're getting hit with a barrage of phantom calls.