Back in 2002 when Grandstream was founded, we were one of the first companies in the world to manufacture SIP products – and one of the very first products we made were analog telephone adapters (ATAs). We now have over 15 years of expertise building SIP devices, and we have more experience building VoIP gateways and ATAs than almost any one in the world. Thanks to close relationships with service providers and partners, all of our ATAs and Gateways are not only thoroughly tested within Grandstream, but they are stringently tested with the help from some of the largest service providers in the world. Our devices provide a variety of high-end features and functionalities that allow analog phones not only to be integrated with VoIP networks, but provide VoIP functions for analog devices as well. Let’s take a look at some of the features and functionalities of Grandstream’s gateways and ATAs that you may have missed.