Complex sentence: Basically, it is an indirect dialling service designed to work seamlessly on POTS and VoIP that builds on the great value of the e.164 numbers: billons of people knowing how to dial using numbers.
Split into simpler sentences: Basically, it is an indirect dialling service designed to work seamlessly on POTS and VoIP. It builds on the great value of the e.164 numbers: billons of people knowing how to dial using numbers.