Because customer relationship is your priority, unlike an operator detailed invoice, the direct interconnection with your PBX allows also to control the incoming calls. Make your statistics on :
VThe number of received calls and determine the impact of your advertising campaigns
VThe missed calls and the ringing time
VThe call traceability
As for incoming traffic, this operating mode allows a more refined analysis of your entire traffic.
VDetermine the totals (outgoing / incoming) by post or by service
VAllocate the consumption to your services
VIdentify your top performers