27.
the telephone is a special means of communication
it interrupts and demands immediate attention
the other speaker is not present and can not be seen, so disagreement and misunderstanding are easier
give more consideration to the caller because he can not see you and respond to your non-verbal cues.
4.how can these practices annoy a caller
a. Saying the name of the company very quickly
b. holding the mouthpiece away from your mouth