PABX system automates the switching position needed to link the calls between extensions by way of IVRs. Every single PABX product linked to the exchange has another extension amount, including computer modems, desk phones, and fax machines. Consumers can use their existing VoIP telephones or buy or lease from Nextiva. https://griffindbvn76433.dbblog.net/5859251/pabx-solutions-for-business-no-further-a-mystery