Sineris PBX is the Best Business Telephone service in the USA. We Also Provide IP Telephony Services in the USA. The Service called IP Telephony or Hosted PBX service. It's also known as IP PBX Service. The Hosted PBX Service is an all in one Business Communication solution based on IP Telephony. A Phone System that carries all the possible features of traditional VoIP phones along with the special advantage of the cloud. Hosted PBX Service is also known as Cloud PBX, IP PBX, or Virtual PBX Service. A Telephone System from Sineris PBX will give your business a professional outlook, unified communication, and improve the productivity of your Business. Nowadays IP PBX service is an essential Communication System for Internal & External. Sineris PBX service also provide full Call Center Solution in the USA with CRM Software.