As service providers kill the public switched telephone network in favor of IP phone services, users ponder how VoIP vs. PTSN issue affects business.

VoIP vs. PSTN: VoIP heats up as the PSTN moves into retirement
Gina Narcisi(Gnarcisi@techtarget.com
Thu, 31 Jan 2013 15:11:30 GMT

Barry Hesk
Intrinsic Network Solutions