>>Customer service implies that the person has to know or learn something about the business. I need someone who can dial the telephone number and ask "Does Mr. John Smith still work for your company?". If no, ask "What is the name of the person who replaced him (or got this job now)?" That is all.
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>Business Contacts Something (manager, secretary, keeper... whatever you like).
First, thank you for your input. As I mentioned to Kevin, if I put in the ad any word that says "Business" or "Customer" or "Support", whatever, it implies that some business learning would be required. Yet I want the person who has the ability to pick up the phone, dial, and ask an operator of a company a simple question. So I will probably refer to the title of the ad as "Part Time Office Telephone Assistant" and then describe the responsibilities.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham