If you require the ability to deal with multiple phone lines and to be able to screen and manage the calls then you need a call handling system. Most call handling systems are SIP based which means instead of lots of analogue phone lines, they use digital lines usually routed through your web connection. But don't worry, we can supply converters to switch analogue lines to SIP if required.
This option is best if you have 'call in shows', phone debates or you just want a cost effective method of enabling phone-in in multiple studios.