Video Phones are scaling up the popularity chart with options provided for simultaneous operation of audio and video. Video phones offer one to one telecommunication service where you can see the person you are calling and talk to him at the same time. Video phones do not look similar to the conventional telephones. Video phones are equipped with a monitor where you can see the person on the other hand. You will also have to install a modem through which the bandwidth will flow. Few contemporary mobiles with advanced technology are also providing the service of video phones nowadays.
Video phones in the earlier days worked on H.323 protocol. But nowadays the widely used protocol on regular phone lines is H.324. But one problem persists with this particular protocol since the bandwidth by the modem is confined to only around 33 Kilobits. This low bandwidth leads to poor video quality.
But a slightly modified version of H.324 called 3G-324M is working fine on certain mobile phones allowing video calls.
