Differences Between VoIP and IP Telephony, PBX and IP PBX

Telephone is not only a means of communication, it is already an integral part of our daily life. The definition of telephony has expanded greatly today and it can’t be compared with the telephone which invented Alexander Graham Bell in 1876. It is defined as the science of transmitting voice, data, video, or images over a distance that is greater than one can shout. The main reason is th ...