Telephone Etiquette

Hi Dear all,
I went to one interview recently.They asked me \"what is Telephone Etiquette?\".
I want to know the details of this.Please give me the knowledge for it.
Before this one question i asked you all,thanks for reply.
Thanks & Regards,
Durga

Telephone etiquette refers to a set of rules that apply when people make calls to others or when they are receiving a phone call. There are slightly different rules for a variety of situations. Making and receiving personal calls are not the same as making/receiving business calls. Within this set of rules there can be differences, especially for business calls where companies may want callers or receivers to say certain things.
For personal telephone etiquette, calling someone means doing several things. A caller should identify him/herself when not recognized right away. In calling a friend or relative, for instance, after the initial “Hello,” the caller should come up with a greeting and identification. “Hello/Hi this is John.” Sometimes a last name is needed if the person being called is an acquaintance or a business representative.