The PBX is owned and operated from the organization as opposed to the telephone business (which can become a provider or provider company, however). End users can use their existing VoIP phones or acquire or lease from Nextiva. All buys or rented telephones are pre-configured and prepared to be used. https://zed-training-consultant-i07272.bluxeblog.com/64664103/wiznet-pabx-systems-fundamentals-explained