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Telephony is the technology associated with the electronic transmission of voice, fax, or other information between distant parties using systems histor...
Voice tutorial explaining traditional analog voice technology, Voice over IP,
IP Telephony, G.711, G.729, G.723, PCM, Mea Opinion Score, Class of Service and ADPCM
Direct person-to-person communication includes non-verbal cues expressed in facial and other bodily articulation, that cannot be transmitted in traditional voice telephony. Video telephony restores such interactions to varying degrees. Social Context Cues Theory is a model to measure the success of different types of communication in maintaining the non-verbal cues present in face-to-face interactions.