I am looking for FREE telephone ethics list for a customer service department. Ex: how to answer the phone and how to end a phone call from customer in good greetings

It's quite straightforward really, simple deal with the customers in a way you yourself would like to be dealt with.

A quick Google search on 'Telephone Manners' brings up a load of brilliant information on various areas of this arena, here's just one that I really liked;

Customer Service -- Telephone Manners : published at CarolinaNewswire.com - Stay on top of the day's business & technology news

But I agree with Curlyben's comments too!