What are the Hardware and software requirements from A to Z to build a home call center to route calls to Europe?

Hi Divya  ,I'm using now elastix technology ,i'm implementing it now ,and planing to increase it's quality and grade ,any advises ?

In terms of Cisco , we need IP Phones , CUCM , Cisco Voice Routers, Cisco PoE switches, UCCX (for Call Center Solution), E1 line, PRI cards, PVDM lines.