Voice over Internet Protocol, also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol networks, such as the Internet.
Can ONLY work alone. Cannot work together with other phones.
Works as mini-PBX alone, OR together with max 5 secondary wireless phones. (ext phones).
Works ONLY as extension phone together with the previous phone.
Works ONLY as extension phone together with the previous phone.