ISDN to SIP – what does it mean?
ISDN to SIP – what does it mean? Traditionally, Integrated service digital network (ISDN) technology allowed inbound and outbound voice calls through a ‘digital’ line – through the internet. But SIP trunking is now replacing ISDN services, which means ISDN will slowly be phased out over the next 5 years. Why? Because it’s better technology. …