Why the teleconference instead of Voice over the Internet (VOIP)?
Technology is not sufficiently advanced to offer VOIP in a quality way to all customers. Even in the USA, several seconds of delay back and forth are common. Outside the US, voice can be particularly choppy and interrupted. Not everyone has an internet microphone and headset. Most people have hands-free telephone headsets or speakerphones for teleconferences, which is recommended.
Technology is not sufficiently advanced to offer VOIP in a quality way to all customers. Even in the USA, several seconds of delay back and forth are common. Outside the US, voice can be particularly choppy and interrupted. Also, not everyone has an internet microphone and headset. Most people have hands-free telephone headsets or speakerphones for teleconferences, which is recommended.