Analog phones work on the traditional analog technology to transmit audio signals only. These phones have limited features and are less expensive as compared to other categories. Digital Phones uses digital technology to transmit signals. They are capable of transferring data as well and are rich in features. They are widely used in offices, manufacturing units etc. IP Phones are widely used now a days with the advancement in the technology. These transmit voice and data over the internet. These phones offers high voice quality, rich features, and supports audio and video conferencing.

The consideration for cloud based and on premise based EPABX depends on the nature of every business. On premise EPABX offers you the ownership of the entire setup once installed in your premises. It gives you full freedom to manage your network as per your requirement. It enables more control on the security aspects and reduces the trunking cost. On the other hand cloud based EPABX have some limitations as the control is in the hands of the service provider and the system will be off-site. A cloud-based hosted phone system is up to the service provider to manage the system, which would be only beneficial for small businesses and start-ups lacking in technical expertise or resources.